{"id":3979,"date":"2026-09-08T08:16:59","date_gmt":"2026-09-08T08:16:59","guid":{"rendered":"https:\/\/nbaem.com\/?p=3979"},"modified":"2026-08-23T04:18:47","modified_gmt":"2026-08-23T04:18:47","slug":"which-metals-are-magnetic-materials","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/which-metals-are-magnetic-materials\/","title":{"rendered":"C\u00e1c kim lo\u1ea1i n\u00e0o l\u00e0 v\u1eadt li\u1ec7u t\u1eeb t\u00ednh Danh s\u00e1ch v\u00e0 h\u01b0\u1edbng d\u1eabn"},"content":{"rendered":"<p>Kh\u00f4ng ph\u1ea3i m\u1ecdi kim lo\u1ea1i \u0111\u1ec1u h\u00fat t\u1eeb t\u00ednh, v\u00e0 bi\u1ebft <strong>kim lo\u1ea1i n\u00e0o l\u00e0 v\u1eadt li\u1ec7u t\u1eeb<\/strong> c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m th\u1eddi gian, c\u00f4ng s\u1ee9c v\u00e0 nh\u1eefng sai l\u1ea7m \u0111\u1eaft ti\u1ec1n v\u1ec1 v\u1eadt li\u1ec7u.<\/p>\n<p>Trong khi c\u00e1c nguy\u00ean t\u1ed1 tinh khi\u1ebft nh\u01b0 <strong>s\u1eaft<\/strong>, <strong>niken<\/strong>, v\u00e0 <strong>cobalt<\/strong> l\u00e0 t\u1ef1 nhi\u00ean <strong>s\u1eaft t\u1eeb<\/strong>, c\u00e1c h\u1ee3p kim ph\u1ed5 bi\u1ebfn nh\u01b0 <strong>th\u00e9p kh\u00f4ng g\u1ec9<\/strong> ho\u1ea1t \u0111\u1ed9ng ho\u00e0n to\u00e0n kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o c\u1ea5u tr\u00fac tinh th\u1ec3 c\u1ee7a ch\u00fang.<\/p>\n<p>Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n s\u1ebd kh\u00e1m ph\u00e1 danh s\u00e1ch x\u00e1c th\u1ef1c c\u1ee7a <strong>kim lo\u1ea1i t\u1eeb<\/strong>, gi\u1ea3i m\u00e3 nh\u1eefng ngo\u1ea1i l\u1ec7 h\u1ee3p kim kh\u00f3 hi\u1ec3u v\u00e0 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c \u0111i\u1ec1u g\u00ec d\u00ednh, \u0111i\u1ec1u g\u00ec \u0111\u1ea9y ra xa, v\u00e0 t\u1ea1i sao.<\/p>\n<p>H\u00e3y b\u1eaft \u0111\u1ea7u ngay th\u00f4i.<\/p>\n<h2>H\u01b0\u1edbng d\u1eabn tham kh\u1ea3o nhanh v\u1ec1 kim lo\u1ea1i t\u1eeb<\/h2>\n<p>Hi\u1ec3u bi\u1ebft <strong>kim lo\u1ea1i n\u00e0o l\u00e0 v\u1eadt li\u1ec7u t\u1eeb<\/strong> l\u00e0 y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu cho t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf \u0111i\u1ec7n t\u1eeb, hi\u1ec7u su\u1ea5t \u0111\u1ed9ng c\u01a1 v\u00e0 l\u1ef1a ch\u1ecdn c\u00e1c th\u00e0nh ph\u1ea7n c\u1ea5u tr\u00fac. Kim lo\u1ea1i r\u01a1i v\u00e0o c\u00e1c lo\u1ea1i t\u1eeb t\u00ednh ri\u00eang bi\u1ec7t d\u1ef1a tr\u00ean spin electron nguy\u00ean t\u1eed v\u00e0 c\u1ea5u tr\u00fac mi\u1ec1n t\u1eeb.<\/p>\n<h3>Nh\u1eefng y\u1ebfu t\u1ed1 ferromagnetic l\u00f5i<\/h3>\n<p>Nh\u1eefng ph\u1ea7n t\u1eed tinh khi\u1ebft n\u00e0y th\u1ec3 hi\u1ec7n s\u1ef1 h\u00fat m\u1ea1nh v\u00e0 t\u1ef1 ph\u00e1t \u0111\u1ed1i v\u1edbi tr\u01b0\u1eddng t\u1eeb v\u00e0 gi\u1eef t\u1eeb t\u00ednh:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>S\u1eaft (Fe):<\/strong> Ti\u00eau chu\u1ea9n c\u01a1 s\u1edf cho \u0111\u1ed9 t\u1eeb th\u1ea9m t\u1eeb v\u00e0 thi\u1ebft k\u1ebf l\u00f5i \u0111i\u1ec7n t\u1eeb c\u00f3 t\u1eeb th\u00f4ng cao.<\/li>\n<li><strong>Nickel (Ni):<\/strong> Duy tr\u00ec t\u00ednh ch\u1ea5t t\u1eeb \u200b\u200btr\u01a1 m\u1ea1nh v\u1edbi kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u1ec9n t\u00edch h\u1ee3p.<\/li>\n<li><strong>Cobalt (Co):<\/strong> Quan tr\u1ecdng cho c\u00e1c \u1ee9ng d\u1ee5ng ch\u1ecbu nhi\u1ec7t cao do \u0111i\u1ec3m Curie c\u1ef1c k\u1ef3 cao c\u1ee7a n\u00f3.<\/li>\n<li><strong>Gadolinium (Gd):<\/strong> Cho th\u1ea5y h\u00e0nh vi ferromagnet \u1edf nhi\u1ec7t \u0111\u1ed9 d\u01b0\u1edbi ph\u00f2ng (d\u01b0\u1edbi 20\u00b0C \/ 68\u00b0F).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>H\u1ee3p kim t\u1eeb ph\u1ed5 bi\u1ebfn<\/h3>\n<p>Ch\u00fang t\u00f4i s\u1eed d\u1ee5ng <strong>h\u1ee3p kim nam ch\u00e2m v\u0129nh c\u1eedu<\/strong> v\u00e0 v\u1eadt li\u1ec7u t\u1eeb m\u1ec1m \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c m\u1ee5c ti\u00eau m\u1eadt \u0111\u1ed9 flux nh\u1ea5t \u0111\u1ecbnh:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Neodymium-Iron-Boron (NdFeB):<\/strong> Nam ch\u00e2m v\u0129nh vi\u1ec5n c\u00f3 s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng cao nh\u1ea5t cho h\u1ec7 truy\u1ec1n \u0111\u1ed9ng EV v\u00e0 robot<\/li>\n<li><strong>Samarium-Cobalt (SmCo):<\/strong> Nam ch\u00e2m c\u00f3 \u0111\u1ed9 c\u01b0\u1ee1ng t\u1eeb l\u1edbn \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a cho nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t v\u00e0 m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n<\/li>\n<li><strong>AlNiCo &amp; Ferrite\/Ceramic:<\/strong> Nguy\u00ean v\u1eadt li\u1ec7u c\u00f3 chi ph\u00ed hi\u1ec7u qu\u1ea3 v\u1edbi \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u00e0 \u0111i\u1ec7n tr\u1edf cao<\/li>\n<li><strong>Carbon Steel &amp; Cast Iron:<\/strong> C\u00e1c v\u1eadt li\u1ec7u t\u1eeb t\u00ednh s\u1eaft ti\u00eau chu\u1ea9n cho d\u1eabn t\u1eeb v\u00e0 khung \u0111\u1ed9ng c\u01a1<\/li>\n<li><strong>FeCrCo:<\/strong> C\u00e1c h\u1ee3p kim ductile, c\u00f3 th\u1ec3 gia c\u00f4ng, \u0111\u01b0\u1ee3c t\u00f9y ch\u1ec9nh cho c\u00e1c h\u00ecnh h\u1ecdc t\u00f9y \u00fd<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Non-Magnetic Metals<\/h3>\n<p>Nh\u1eefng kim lo\u1ea1i n\u00e0y kh\u00f4ng cho l\u1ef1c h\u00fat \u0111\u00e1ng k\u1ec3 t\u1eeb nam ch\u00e2m v\u0129nh vi\u1ec5n d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n c\u00f4ng nghi\u1ec7p chu\u1ea9n<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Aluminum, Copper, Brass, Bronze, Gold, Silver, Titanium, Lead<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Nh\u00f4m, \u0110\u1ed3ng, \u0110\u1ed3ng thau, \u0110\u1ed3ng thau kim lo\u1ea1i, V\u00e0ng, B\u1ea1c, Titanium, Ch\u00ec<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">T\u00ean Kim lo\u1ea1i<\/th>\n<th style=\"text-align: left;\">Danh m\u1ee5c T\u1eeb t\u00ednh<\/th>\n<th style=\"text-align: left;\">\u0110\u1ed9 t\u1eeb th\u1ea9m t\u01b0\u01a1ng \u0111\u1ed1i<\/th>\n<th style=\"text-align: left;\">\u1ee8ng d\u1ee5ng C\u00f4ng nghi\u1ec7p Ch\u00ednh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>S\u1eaft Thu\u1ea7n (Fe)<\/strong><\/td>\n<td style=\"text-align: left;\">S\u1eaft t\u1eeb<\/td>\n<td style=\"text-align: left;\">5.000 \u2013 200.000<\/td>\n<td style=\"text-align: left;\">l\u00f5i bi\u1ebfn \u00e1p, solenoid<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>NdFeB Neodymium<\/strong><\/td>\n<td style=\"text-align: left;\">Phong ferromagnetic v\u0129nh vi\u1ec5n<\/td>\n<td style=\"text-align: left;\">1.05<\/td>\n<td style=\"text-align: left;\">\u0110\u1ed9ng c\u01a1 EV hi\u1ec7u su\u1ea5t cao, c\u01a1 c\u1ea5u ch\u1ea5p h\u00e0nh<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Nickel (Ni)<\/strong><\/td>\n<td style=\"text-align: left;\">S\u1eaft t\u1eeb<\/td>\n<td style=\"text-align: left;\">100 \u2013 600<\/td>\n<td style=\"text-align: left;\">Busbar pin, ch\u1eafn t\u1eeb<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Cobalt (Co)<\/strong><\/td>\n<td style=\"text-align: left;\">S\u1eaft t\u1eeb<\/td>\n<td style=\"text-align: left;\">250<\/td>\n<td style=\"text-align: left;\">L\u1eafp gh\u00e9p t\u1eeb tr\u01b0\u1eddng \u1edf nhi\u1ec7t \u0111\u1ed9 cao<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Th\u00e9p C45<\/strong><\/td>\n<td style=\"text-align: left;\">S\u1eaft t\u1eeb<\/td>\n<td style=\"text-align: left;\">100 \u2013 1,000<\/td>\n<td style=\"text-align: left;\">v\u1ecf \u0111\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p, khung k\u1ebft c\u1ea5u<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Nh\u00f4m<\/strong><\/td>\n<td style=\"text-align: left;\">V\u1eadt li\u1ec7u t\u1eeb thu\u1eadn<\/td>\n<td style=\"text-align: left;\">1.000022<\/td>\n<td style=\"text-align: left;\">C\u1ea5u tr\u00fac h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, b\u1ed9 trao \u0111\u1ed5i nhi\u1ec7t<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u0110\u1ed3ng<\/strong><\/td>\n<td style=\"text-align: left;\">V\u1eadt li\u1ec7u t\u1eeb ch\u1ed1ng<\/td>\n<td style=\"text-align: left;\">0.99999<\/td>\n<td style=\"text-align: left;\">Cu\u1ed9n d\u00e2y \u0111i\u1ec7n d\u1eabn \u0111i\u1ec7n cao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>V\u1eadt l\u00fd c\u1ee7a t\u1eeb t\u00ednh kim lo\u1ea1i<\/h2>\n<p>Hi\u1ec3u t\u1ea1i sao m\u1ed9t s\u1ed1 kim lo\u1ea1i ph\u1ea3n \u1ee9ng v\u1edbi tr\u01b0\u1eddng t\u1eeb t\u00ednh \u0111\u00f2i h\u1ecfi ph\u1ea3i xem x\u00e9t c\u01a1 h\u1ecdc \u1edf c\u1ea5p \u0111\u1ed9 nguy\u00ean t\u1eed. Trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m v\u00e0 s\u1ea3n xu\u1ea5t c\u1ee7a ch\u00fang t\u00f4i, ch\u00fang t\u00f4i \u0111\u00e1nh gi\u00e1 h\u00e0nh vi kim lo\u1ea1i tr\u00ean b\u1ed1n ph\u00e2n lo\u1ea1i khoa h\u1ecdc:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Ferromagnetic:<\/strong> Hi\u1ec3n th\u1ecb l\u1ef1c h\u1ea5p d\u1eabn t\u1eeb m\u1ea1nh v\u00e0 duy tr\u00ec t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n do s\u1ef1 gh\u00e9p song song c\u1ee7a spin.<\/li>\n<li><strong>Paramagnetic:<\/strong> Hi\u1ec3n th\u1ecb m\u1ed9t l\u1ef1c h\u1ea5p d\u1eabn y\u1ebfu v\u00e0 t\u1ea1m th\u1eddi trong c\u00e1c tr\u01b0\u1eddng t\u1eeb b\u00ean ngo\u00e0i nh\u01b0ng gi\u1eef l\u1ea1i t\u1eeb t\u00ednh d\u01b0 zero khi tr\u01b0\u1eddng \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf.<\/li>\n<li><strong>Diamagnetic:<\/strong> C\u00f3 c\u00e1c electron gh\u00e9p t\u1ea1o ra l\u1ef1c \u0111\u1ea9y ng\u01b0\u1ee3c y\u1ebfu \u0111\u1ed1i v\u1edbi c\u00e1c tr\u01b0\u1eddng t\u1eeb b\u00ean ngo\u00e0i.<\/li>\n<li><strong>Ferrimagnetic:<\/strong> Hi\u1ec3n th\u1ecb c\u00e1c moment t\u1eeb c\u1ee7a nguy\u00ean t\u1eed \u0111\u1ed1i l\u1eadp c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t, \u0111i\u1ec3n h\u00ecnh trong c\u00e1c h\u1ee3p ch\u1ea5t oxit s\u1eaft ph\u1ee9c t\u1ea1p.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Nh\u1eefng \u0111\u1ed9ng l\u1ef1c v\u1eadt l\u00fd c\u1ee7a t\u1eeb t\u00ednh kim lo\u1ea1i<\/h3>\n<p>Ba \u0111\u1ed9ng l\u1ef1c v\u1eadt l\u00fd l\u00f5i chi ph\u1ed1i xem kim lo\u1ea1i c\u00f3 tri\u1ec3n khai t\u00ednh ch\u1ea5t t\u1eeb hay kh\u00f4ng:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>C\u0103n ch\u1ec9nh Spin Electron:<\/strong> C\u00e1c electron valence l\u1ebb t\u1ea1o ra c\u00e1c moment t\u1eeb t\u1eeb. C\u00e1c kim lo\u1ea1i t\u1eeb t\u00ednh m\u1ea1nh c\u00f3 c\u00e1c spin song song \u0111\u01b0\u1ee3c gi\u1eef c\u1ed1 \u0111\u1ecbnh b\u1eb1ng c\u00e1c t\u01b0\u01a1ng t\u00e1c trao \u0111\u1ed5i l\u01b0\u1ee3ng t\u1eed.<\/li>\n<li><strong>C\u1ea5u tr\u00fac mi\u1ec1n:<\/strong> T\u1ef7 l\u1ec7 h\u00e0ng t\u1ec9 moment nguy\u00ean t\u1eed t\u1eadp h\u1ee3p th\u00e0nh c\u00e1c v\u00f9ng c\u1ee5c b\u1ed9 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 mi\u1ec1n t\u1eeb. \u00c1p d\u1ee5ng m\u1ed9t tr\u01b0\u1eddng ngo\u00e0i s\u1ebd c\u0103n ch\u1ec9nh c\u00e1c mi\u1ec1n theo song song, t\u1ed1i \u0111a h\u00f3a m\u1eadt \u0111\u1ed9 flux t\u1ed5ng. Vi\u1ec7c xem x\u00e9t <a href=\"https:\/\/nbaem.com\/vi\/magnetic-domains-in-samarium-cobalt-magnets\/\">c\u00e1c mi\u1ec1n t\u1eeb trong nam ch\u00e2m samari-crom<\/a> cho th\u1ea5y c\u00e1ch c\u00e1c ranh gi\u1edbi mi\u1ec1n d\u00e0y \u0111\u1eb7c ng\u0103n ng\u1eeba m\u1ea5t t\u1eeb ng\u1eabu nhi\u00ean.<\/li>\n<li><strong>S\u1eafp x\u1ebfp Lattice Tinh th\u1ec3:<\/strong> Lattice tinh th\u1ec3 h\u00ecnh thoi trung t\u00e2m (BCC), nh\u01b0 s\u1eaft alpha, t\u1ef1 nhi\u00ean h\u1ed7 tr\u1ee3 s\u1ef1 s\u1eafp x\u1ebfp ferromagnetic. C\u1ea5u tr\u00fac h\u00ecnh m\u1eb7t ph\u1eb3ng t\u00e2m (FCC), nh\u01b0 th\u00e9p austenitic, \u0111\u1ed1i x\u1ee9ng l\u00e0m m\u1ea5t c\u00e1c moment t\u1eeb nguy\u00ean t\u1eed v\u00e0 \u1edf tr\u1ea1ng th\u00e1i phi t\u1eeb t\u00ednh.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Nhi\u1ec7t \u0111\u1ed9 Curie v\u00e0 gi\u1edbi h\u1ea1n m\u1ea5t t\u1eeb<\/h3>\n<p>N\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t l\u1ef1c \u0111\u1ed1i kh\u00e1ng tr\u1ef1c ti\u1ebfp v\u1edbi s\u1ef1 s\u1eafp x\u1ebfp t\u1eeb. Khi nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u0103ng l\u00ean, s\u1ef1 k\u00edch \u0111\u1ed9ng nhi\u1ec7t l\u00e0m y\u1ebfu c\u00e1c ranh gi\u1edbi mi\u1ec1n v\u00e0 l\u00e0m gi\u1ea3m m\u1eadt \u0111\u1ed9 flux t\u1eeb t\u1ed5ng th\u1ec3.<\/p>\n<p>Khi m\u1ed9t kim lo\u1ea1i \u0111\u1ea1t \u0111\u1ebfn <strong>Nhi\u1ec7t \u0111\u1ed9 Curie<\/strong>, n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t ho\u00e0n to\u00e0n l\u1ea5n \u00e1t s\u1ef1 trao \u0111\u1ed5i. Kim lo\u1ea1i m\u1ea5t \u0111i t\u1eeb t\u00ednh t\u1ef1 ph\u00e1t v\u00e0 chuy\u1ec3n th\u00e0nh v\u1eadt li\u1ec7u para t\u1eeb t\u00ednh.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Cobalt (Co):<\/strong> \u0110i\u1ec3m Curie \u1edf 1.121\u00b0C<\/li>\n<li><strong>S\u1eaft (Fe):<\/strong> \u0110i\u1ec3m Curie \u1edf 770\u00b0C<\/li>\n<li><strong>Nickel (Ni):<\/strong> \u0110i\u1ec3m Curie \u1edf 358\u00b0C<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>V\u01b0\u1ee3t qu\u00e1 c\u00e1c ng\u01b0\u1ee1ng v\u1eadn h\u00e0nh then ch\u1ed1t d\u1eabn \u0111\u1ebfn suy gi\u1ea3m nhi\u1ec7t v\u00e0 kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c. Vi\u1ec7c t\u00ednh to\u00e1n c\u00e1c gi\u1edbi h\u1ea1n nhi\u1ec7t n\u00e0y ng\u0103n ng\u1eeba t\u1ed5n th\u1ea5t nghi\u00eam tr\u1ecdng <a href=\"https:\/\/nbaem.com\/vi\/cause-demagnetization-in-permanent-magnet-motors\/\">demagnetization trong \u0111\u1ed9ng c\u01a1 t\u1eeb v\u0129nh vi\u1ec5n<\/a>, b\u1ea3o to\u00e0n hi\u1ec7u su\u1ea5t m\u00f4-men xo\u1eafn v\u00e0 hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh c\u1ea5u tr\u00fac.<\/p>\n<h2>S\u1ef1 c\u1ed1 c\u1ee7a h\u1ee3p kim t\u1eeb v\u00e0 v\u1eadt li\u1ec7u Nam ch\u00e2m v\u0129nh c\u1eedu<\/h2>\n<p>Vi\u1ec7c ch\u1ecdn h\u1ee3p kim nam ch\u00e2m v\u0129nh c\u1eedu ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh, nhu c\u1ea7u m\u1eadt \u0111\u1ed9 flux v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c c\u01a1 h\u1ecdc. Ch\u00fang t\u00f4i thi\u1ebft k\u1ebf v\u1eadt li\u1ec7u t\u1eeb cho c\u00f4ng nghi\u1ec7p v\u1edbi hi\u1ec7u su\u1ea5t t\u1ed1i \u0111a, t\u1eeb d\u01b0 cao v\u00e0 s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a (BHmax).<\/p>\n<h3>Nam ch\u00e2m hi\u1ebfm (Rare-Earth) v\u0129nh c\u1eedu<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>NdFeB sintered &amp; bonded:<\/strong> \u0110\u01b0a ra s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng cao nh\u1ea5t (BHmax l\u00ean t\u1edbi 52 MGOe). L\u00fd t\u01b0\u1edfng cho \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n hi\u1ec7u su\u1ea5t cao v\u00e0 c\u00e1c b\u1ed9 \u0111i\u1ec1u khi\u1ec3n nh\u1ecf g\u1ecdn y\u00eau c\u1ea7u flux t\u1ed1i \u0111a trong footprint kh\u00f4ng gian t\u1ed1i thi\u1ec3u.<\/li>\n<li><strong>Samarium Cobalt (SmCo):<\/strong> Thi\u1ebft y\u1ebfu cho m\u00f4i tr\u01b0\u1eddng h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 \u00f4 t\u00f4 \u1edf nhi\u1ec7t \u0111\u1ed9 cao. Khi \u0111\u00e1nh gi\u00e1 <a href=\"https:\/\/nbaem.com\/vi\/samarium-cobalt-vs-neodymium-magnets\/\">nam ch\u00e2m samarium cobalt so v\u1edbi nam ch\u00e2m neodymium<\/a>, SmCo cung c\u1ea5p s\u1ef1 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u01b0\u1ee3t tr\u1ed9i (v\u1eadn h\u00e0nh t\u1edbi 350\u00b0C) v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng oxi h\u00f3a v\u1ed1n c\u00f3 m\u00e0 kh\u00f4ng c\u1ea7n m\u1ea1 b\u1ec1 m\u1eb7t. K\u1ef9 s\u01b0 t\u1ef1 h\u1ecfi <a href=\"https:\/\/nbaem.com\/vi\/are-samarium-cobalt-magnets-stronger-than-neodymium\/\">li\u1ec7u nam ch\u00e2m samari cobalt c\u00f3 m\u1ea1nh h\u01a1n neodymium<\/a> n\u00ean l\u01b0u \u00fd r\u1eb1ng trong khi NdFeB v\u01b0\u1ee3t tr\u1ed9i v\u1ec1 l\u1ef1c \u0111\u1ec9nh \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng, SmCo v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c s\u1ee9c m\u1ea1nh t\u1eeb \u1edf nhi\u1ec7t \u0111\u1ed9 cao c\u1ef1c \u0111oan.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>H\u1ee3p kim th\u00f4ng th\u01b0\u1eddng v\u00e0 c\u00f4ng nghi\u1ec7p<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>H\u1ee3p kim AlNiCo:<\/strong> T\u00ednh t\u1eeb t\u00ednh d\u01b0 cao Br v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t l\u00ean t\u1edbi 520\u00b0C. S\u1ef1 kh\u00e1ng c\u01b0\u1ee1ng t\u1eeb y\u1ebfu h\u01a1n y\u00eau c\u1ea7u thi\u1ebft k\u1ebf m\u1ea1ch c\u1ee5 th\u1ec3 \u0111\u1ec3 ng\u0103n ng\u1eeba m\u1ea5t t\u1eeb t\u00ednh.<\/li>\n<li><strong>Nam ch\u00e2m g\u1ed1m \/ Ferrite:<\/strong> Nguy\u00ean v\u1eadt li\u1ec7u c\u00f4ng nghi\u1ec7p ti\u1ebft ki\u1ec7m chi ph\u00ed v\u1edbi \u0111i\u1ec7n tr\u1edf \u0111i\u1ec7n cao, lo\u1ea1i b\u1ecf t\u1ed5n th\u1ea5t d\u00f2ng xo\u00e1y \u1edf c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea7n s\u1ed1 cao.<\/li>\n<li><strong>Nam ch\u00e2m FeCrCo &amp; Linh ho\u1ea1t:<\/strong> Tu\u1ef3 ch\u1ecdn gia c\u00f4ng v\u00e0 t\u00f9y ch\u1ec9nh ph\u00f9 h\u1ee3p v\u1edbi h\u00ecnh h\u1ecdc ph\u1ee9c t\u1ea1p, chi ti\u1ebft d\u1eadp g\u00e1y sai s\u1ed1 h\u1eb9p, ho\u1eb7c \u0111\u00fac \u00e9p.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Ma tr\u1eadnHi\u1ec7u su\u1ea5t H\u1ee3p kim Nam ch\u00e2m<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">V\u1eadt li\u1ec7u H\u1ee3p kim<\/th>\n<th style=\"text-align: left;\">S\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a (BHmax)<\/th>\n<th style=\"text-align: left;\">Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/th>\n<th style=\"text-align: left;\">\u01afu th\u1ebf C\u00f4ng nghi\u1ec7p Ch\u00ednh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>NdFeB nung sintered<\/strong><\/td>\n<td style=\"text-align: left;\">35 \u2013 52 MGOe<\/td>\n<td style=\"text-align: left;\">80\u00b0C \u2013 220\u00b0C<\/td>\n<td style=\"text-align: left;\">\u0110\u1ed9 m\u1ea1nh tr\u01b0\u1eddng v\u00e0 \u0111\u1ed9 kh\u00e1ng t\u1eeb kh\u00f4ng \u0111\u1ed1i th\u1ee7<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Cobalt Samari (SmCo)<\/strong><\/td>\n<td style=\"text-align: left;\">18 \u2013 32 MGOe<\/td>\n<td style=\"text-align: left;\">250\u00b0C \u2013 350\u00b0C<\/td>\n<td style=\"text-align: left;\">\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t cao v\u00e0 kh\u00e1ng \u0103n m\u00f2n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>AlNiCo<\/strong><\/td>\n<td style=\"text-align: left;\">5 \u2013 10 MGOe<\/td>\n<td style=\"text-align: left;\">520\u00b0C<\/td>\n<td style=\"text-align: left;\">L\u01b0u ya\u0303ng d\u1ef1 ph\u00f2ng n\u1ed5i b\u1eadt \u1edf nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111oan<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Ferrite \/ Ceramic<\/strong><\/td>\n<td style=\"text-align: left;\">1.1 \u2013 4.5 MGOe<\/td>\n<td style=\"text-align: left;\">250\u00b0C<\/td>\n<td style=\"text-align: left;\">Chi ph\u00ed v\u1eadt li\u1ec7u th\u1ea5p v\u00e0 \u0111i\u1ec7n tr\u1edf \u0111i\u1ec7n h\u1ecdc cao<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Ngo\u1ea1i l\u1ec7 c\u1ee7a th\u00e9p kh\u00f4ng g\u1ec9: T\u1ea1i sao m\u1ed9t s\u1ed1 Grades d\u00ednh v\u00e0 nh\u1eefng lo\u1ea1i kh\u00e1c th\u00ec kh\u00f4ng<\/h2>\n<p>Khi ng\u01b0\u1eddi mua h\u1ecfi ch\u00fang t\u00f4i <strong>kim lo\u1ea1i n\u00e0o l\u00e0 v\u1eadt li\u1ec7u t\u1eeb<\/strong>, th\u00e9p kh\u00f4ng g\u1ec9 th\u01b0\u1eddng g\u00e2y nh\u1ea7m l\u1eabn. M\u1ed9t quan ni\u1ec7m sai l\u1ea7m ph\u1ed5 bi\u1ebfn l\u00e0 t\u1ea5t c\u1ea3 th\u00e9p kh\u00f4ng g\u1ec9 \u0111\u1ec1u kh\u00f4ng t\u1eeb t\u00ednh, nh\u01b0ng c\u00e2u tr\u1ea3 l\u1eddi th\u1ef1c s\u1ef1 ph\u1ee5 thu\u1ed9c ho\u00e0n to\u00e0n v\u00e0o c\u1ea5u tr\u00fac tinh th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp trong qu\u00e1 tr\u00ecnh h\u1ee3p kim<\/p>\n<h3>Th\u00e9p kh\u00f4ng g\u1ec9 Austenitic (D\u00f2ng 300)<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>C\u1ea5u tr\u00fac:<\/strong> Lattice tinh th\u1ec3 h\u00ecnh kh\u1ed1i t\u00e2m m\u1eb7t (FCC).<\/li>\n<li><strong>H\u00e0nh vi t\u1eeb t\u00ednh:<\/strong> Kh\u00f4ng t\u1eeb t\u00ednh \u1edf tr\u1ea1ng th\u00e1i anneal ho\u00e0n to\u00e0n.<\/li>\n<li><strong>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:<\/strong> C\u00e1c h\u1ee3p kim nh\u01b0 304 v\u00e0 316 c\u00f3 h\u00e0m l\u01b0\u1ee3ng nickel cao, \u1ed5n \u0111\u1ecbnh h\u00f3a pha FCC kh\u00f4ng t\u1eeb t\u00ednh.<\/li>\n<li><strong>T\u00e1c \u0111\u1ed9ng c\u1ee7a qu\u00e1 tr\u00ecnh:<\/strong> Gia c\u00f4ng l\u1ea1nh m\u1ea1nh, gia c\u00f4ng ho\u1eb7c h\u00e0n l\u00e0m bi\u1ebfn d\u1ea1ng c\u1ea5u tr\u00fac nguy\u00ean t\u1eed th\u00e0nh martensite, g\u00e2y ra l\u1ef1c t\u1eeb \u0111\u1ecba ph\u01b0\u01a1ng nh\u1ecf. Ch\u00fang t\u00f4i th\u01b0\u1eddng khuy\u00ean d\u00f9ng c\u00e1c lo\u1ea1i d\u00f2ng 300 cho c\u00e1c v\u1ecf b\u1ecdc nh\u1ea1y c\u1ea3m \u0111\u1ec3 ng\u0103n nhi\u1ec5u t\u1eeb ho\u1eb7c t\u1eeb t\u00ednh ph\u1ee5 tr\u1ee3 <a href=\"https:\/\/nbaem.com\/vi\/what-is-magnetic-coupling-in-transformer\/\">gh\u00e9p t\u1eeb tr\u01b0\u1eddng trong h\u1ec7 th\u1ed1ng bi\u1ebfn \u00e1p<\/a> v\u00e0 \u0111i\u1ec7n t\u1eed ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Th\u00e9p kh\u00f4ng g\u1ec9 ferritic (Chu\u1ed7i 400)<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>C\u1ea5u tr\u00fac:<\/strong> Lattice tinh th\u1ec3 h\u00ecnh kh\u1ed1i t\u00e2m th\u00e2n (BCC).<\/li>\n<li><strong>H\u00e0nh vi t\u1eeb t\u00ednh:<\/strong> C\u00f3 t\u1eeb t\u00ednh n\u1ed9i t\u1ea1i.<\/li>\n<li><strong>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:<\/strong> Lo\u1ea1i th\u00e9p 430 ch\u1ee9a crom cao m\u00e0 kh\u00f4ng b\u1ed5 sung Nikel, duy tr\u00ec c\u1ea5u tr\u00fac BCC \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng. N\u00f3 cung c\u1ea5p s\u1ee9c h\u00fat t\u1eeb m\u1ea1nh, kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t v\u00e0 hi\u1ec7u su\u1ea5t chi ph\u00ed hi\u1ec7u qu\u1ea3 cho vi\u1ec1n \u00f4 t\u00f4 v\u00e0 b\u1ea3ng thi\u1ebft b\u1ecb gia d\u1ee5ng.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Th\u00e9p kh\u00f4ng g\u1ec9 martensitic (Chu\u1ed7i 400)<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>C\u1ea5u tr\u00fac:<\/strong> Lattice h\u00ecnh t\u1ee9 di\u1ec7n t\u00e2m th\u00e2n (BCT) ho\u1eb7c BCC.<\/li>\n<li><strong>H\u00e0nh vi t\u1eeb t\u00ednh:<\/strong> To\u00e0n ph\u1ea7n t\u1eeb t\u00ednh ferromagnetic.<\/li>\n<li><strong>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh:<\/strong> C\u00e1c lo\u1ea1i nh\u01b0 410 v\u00e0 420 ch\u1ee9a m\u1ee9c carbon cao h\u01a1n, l\u00e0m ch\u00fang c\u00f3 th\u1ec3 nhi\u1ec7t luy\u1ec7n \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc cao, \u0111\u1ed9 c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u00e0i m\u00f2n trong khi v\u1eabn b\u1ea3o to\u00e0n s\u1ee9c h\u00fat t\u1eeb m\u1ea1nh.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>Ma tr\u1eadn so s\u00e1nh c\u00e1c Series th\u00e9p kh\u00f4ng g\u1ec9<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">L\u1edbp h\u1ee3p kim<\/th>\n<th style=\"text-align: left;\">C\u1ea5u tr\u00fac tinh th\u1ec3<\/th>\n<th style=\"text-align: left;\">T\u1eeb t\u00ednh \u1edf tr\u1ea1ng th\u00e1i annealed<\/th>\n<th style=\"text-align: left;\">\u1ea2nh h\u01b0\u1edfng c\u1ee7a qu\u00e1 tr\u00ecnh gia c\u00f4ng<\/th>\n<th style=\"text-align: left;\">C\u00e1c c\u1ea5p \u0111\u1ed9 ban \u0111\u1ea7u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Austenitic<\/strong><\/td>\n<td style=\"text-align: left;\">Lattice m\u1eb7t \u2013 l\u1eadp th\u1ec3 \u0111\u01a1n v\u1ecb m\u1eb7t t\u00e2m (FCC)<\/td>\n<td style=\"text-align: left;\">Kh\u00f4ng t\u1eeb t\u00ednh<\/td>\n<td style=\"text-align: left;\">Ph\u00e1t tri\u1ec3n t\u1eeb t\u00ednh nh\u1eb9 khi gia c\u00f4ng l\u1ea1nh<\/td>\n<td style=\"text-align: left;\">304, 316<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Ferritic<\/strong><\/td>\n<td style=\"text-align: left;\">Lattice t\u00e2m-chi\u1ebfu kh\u1ed1i c\u01a1 th\u1ec3 (BCC)<\/td>\n<td style=\"text-align: left;\">M\u1ea1nh t\u1eeb t\u00ednh ferromagnetic<\/td>\n<td style=\"text-align: left;\">Gi\u1eef nguy\u00ean t\u00ednh t\u1eeb ferromagnetism; ch\u1ecbu nhi\u1ec7t luy\u1ec7n<\/td>\n<td style=\"text-align: left;\">430<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Martensitic<\/strong><\/td>\n<td style=\"text-align: left;\">Tetrahedral t\u00e2m-chi\u1ebfu kh\u1ed1i c\u01a1 th\u1ec3<\/td>\n<td style=\"text-align: left;\">M\u1ea1nh t\u1eeb t\u00ednh ferromagnetic<\/td>\n<td style=\"text-align: left;\">Gi\u1eef nguy\u00ean t\u00ednh t\u1eeb ferromagnetism; r\u00e8n luy\u1ec7n b\u1eb1ng nhi\u1ec7t<\/td>\n<td style=\"text-align: left;\">410, 420<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u1ee8ng d\u1ee5ng c\u00f4ng nghi\u1ec7p: Nh\u1eefng kim lo\u1ea1i n\u00e0o l\u00e0 v\u1eadt li\u1ec7u t\u1eeb t\u00ednh trong c\u00f4ng ngh\u1ec7 B2B?<\/h2>\n<p>Ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c h\u1ec7 th\u1ed1ng h\u1ee3p kim chuy\u00ean d\u1ee5ng tr\u00ean nhi\u1ec1u l\u0129nh v\u1ef1c s\u1ea3n xu\u1ea5t to\u00e0n c\u1ea7u, n\u01a1i vi\u1ec7c l\u1ef1a ch\u1ecdn <strong>kim lo\u1ea1i n\u00e0o l\u00e0 v\u1eadt li\u1ec7u t\u1eeb<\/strong> quy \u0111\u1ecbnh thi\u1ebft k\u1ebf c\u1ea5u tr\u00fac, hi\u1ec7u su\u1ea5t v\u00e0 truy\u1ec1n \u0111\u1ed9ng m\u00f4-men xo\u1eafn.<\/p>\n<h3>\u00d4 t\u00f4 &amp; Xe \u0111i\u1ec7n (EV)<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>J\u1ecdng v\u00e0 l\u00f5i lam c\u1ee7a stato v\u00e0 r\u00f4to:<\/strong> Ch\u00fang t\u00f4i x\u1eed l\u00fd c\u00e1c lam b\u1eb1ng th\u00e9p silicon c\u00f3 \u0111\u1ed9 d\u1eabn t\u1eeb th\u1ea5p v\u00e0 m\u1ecfng \u0111\u1ec3 h\u1ea1n ch\u1ebf t\u1ed5n th\u1ea5t d\u00f2ng xo\u00e1y trong c\u00e1c \u0111\u01a1n v\u1ecb truy\u1ec1n \u0111\u1ed9ng \u0111i\u1ec7n \u1edf t\u1ed1c \u0111\u1ed9 cao.<\/li>\n<li><strong>\u0110\u1ed9ng c\u01a1 \u0111\u1ed3ng b\u1ed9 nam ch\u00e2m v\u0129nh c\u1eedu (PMSM):<\/strong> Hi\u1ec7u su\u1ea5t truy\u1ec1n \u0111\u1ed9ng ph\u1ee5 thu\u1ed9c v\u00e0o NdFeB sintered c\u00f3 \u0111\u1ed9 t\u1eeb th\u1ecd cao. L\u1ef1a ch\u1ecdn <a href=\"https:\/\/nbaem.com\/vi\/what-motor-magnets-used-in-permanent-magnet-motors\/\">c\u00e2u nam ch\u00e2m \u0111\u1ed9ng c\u01a1 ph\u00f9 h\u1ee3p \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111\u1ed9ng c\u01a1 nam ch\u00e2m v\u0129nh c\u1eedu<\/a> \u0111\u1ea3m b\u1ea3o m\u1eadt \u0111\u1ed9 m\u00f4-men xo\u1eafn t\u1ed1i \u0111a v\u00e0 s\u1ef1 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t d\u01b0\u1edbi t\u1ea3i tr\u1ecdng n\u1eb7ng.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u0110i\u1ec7n t\u1eed ch\u00ednh x\u00e1c &amp; Robot<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>L\u00f5i \u0111\u1ed9ng c\u01a1 servo:<\/strong> C\u00e1c h\u1ee3p kim s\u1eaft m\u1ec1m c\u00f3 t\u1eeb t\u00ednh ph\u1ee5c h\u1ed3i th\u1ea5p cho ph\u00e9p ph\u1ea3n h\u1ed3i v\u1ecb tr\u00ed ch\u00ednh x\u00e1c m\u00e0 kh\u00f4ng b\u1ecb nhi\u1ec5u t\u1eeb h\u00e0o d\u01b0.<\/li>\n<li><strong>C\u1ea3m bi\u1ebfn &amp; Assemblies Actuator:<\/strong> C\u00e1c h\u1ee3p kim NdFeB v\u00e0 SmCo \u0111\u01b0\u1ee3c gia c\u00f4ng ch\u00ednh x\u00e1c d\u1eabn \u0111\u1ed9ng c\u00e1c b\u1ed9 truy\u1ec1n \u0111\u1ed9ng mini, k\u00edch ho\u1ea1t c\u1ea3m bi\u1ebfn v\u00e0 loa vi m\u00f4 \u0111\u00f2i h\u1ecfi s\u1ef1 chuy\u1ec3n \u0111\u1ed5i t\u1eeb t\u00ednh s\u1eafc n\u00e9t.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>N\u0103ng l\u01b0\u1ee3ng &amp; C\u00f4ng nghi\u1ec7p n\u1eb7ng<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>M\u00e1y ph\u00e1t gi\u00f3<\/strong> Tuabin tr\u1ef1c ti\u1ebfp truy\u1ec1n \u0111\u1ed9ng quy m\u00f4 ti\u1ec7n \u00edch d\u1ef1a v\u00e0o rotor nam ch\u00e2m v\u0129nh c\u1eedu c\u00f3 h\u00e0m l\u01b0\u1ee3ng t\u1eeb tr\u01b0\u1eddng cao. K\u1ebft h\u1ee3p nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm v\u00e0o <a href=\"https:\/\/nbaem.com\/vi\/magnetic-wind-power\/\">gi\u00f3 c\u00f3 t\u1eeb t\u00ednh<\/a> n\u1ec1n t\u1ea3ng t\u1ed1i \u01b0u h\u00f3a c\u00f4ng su\u1ea5t \u0111\u1ea7u ra \u0111\u1ed3ng th\u1eddi gi\u1ea3m th\u1eddi gian ng\u1eebng b\u1ea3o tr\u00ec.<\/li>\n<li><strong>M\u00e1y t\u1eeb ph\u00e2n t\u00e1ch t\u1eeb v\u00e0 \u0111\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p:<\/strong> S\u1ef1 nung ceramic ferrites v\u00e0 h\u1ee3p kim AlNiCo chi\u1ebft xu\u1ea5t c\u00e1c t\u1ea1p ch\u1ea5t s\u1eaft t\u1eeb c\u00e1c \u0111\u01b0\u1eddng v\u1eadn chuy\u1ec3n v\u00e0 duy tr\u00ec chu k\u1ef3 l\u00e0m vi\u1ec7c m\u1ea1nh m\u1ebd \u1edf c\u00e1c b\u01a1m c\u00f4ng nghi\u1ec7p t\u1ea3i tr\u1ecdng n\u1eb7ng.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Y t\u1ebf &amp; C\u00f4ng ngh\u1ec7 chuy\u00ean d\u1ee5ng<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>C\u00e1c th\u00e0nh ph\u1ea7n NMR &amp; MRI:<\/strong> C\u00e1c tr\u01b0\u1eddng t\u1eeb \u0111\u1ed3ng nh\u1ea5t c\u1ef1c k\u1ef3 \u0111\u1eb3ng c\u1ea5p \u0111\u00f2i h\u1ecfi c\u00e1c ch\u1ecfm s\u1eaft m\u1ec1m chuy\u00ean d\u1ee5ng l\u00e0m vi\u1ec7c c\u00f9ng v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng si\u00eau d\u1eabn.<\/li>\n<li><strong>C\u00f4ng c\u1ee5 ph\u1eabu thu\u1eadt kh\u00f4ng nhi\u1ec5u:<\/strong> Ch\u00fang t\u00f4i k\u1ebft n\u1ed1i c\u00e1c d\u1ee5ng c\u1ee5 l\u00e0m t\u1eeb titanium kh\u00f4ng t\u1eeb ho\u1eb7c th\u00e9p kh\u00f4ng g\u1ec9 Austenitic 316L v\u1edbi nam ch\u00e2m m\u1ee5c ti\u00eau c\u1ee5c b\u1ed9 \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng c\u00e1c thi\u1ebft b\u1ecb ph\u1eabu thu\u1eadt robot an to\u00e0n quanh thi\u1ebft b\u1ecb h\u00ecnh \u1ea3nh.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn k\u1ef9 thu\u1eadt v\u00e0 thi\u1ebft k\u1ebf l\u1eafp r\u00e1p t\u00f9y ch\u1ec9nh<\/h2>\n<p>Vi\u1ec7c ch\u1ecdn kim lo\u1ea1i n\u00e0o l\u00e0 v\u1eadt li\u1ec7u t\u1eeb cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n \u0111\u00f2i h\u1ecfi s\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt l\u00fd th\u00f4 v\u00e0 gi\u1edbi h\u1ea1n c\u1ea5u tr\u00fac. Ch\u00fang t\u00f4i \u0111\u00e1nh gi\u00e1 c\u00e1c tham s\u1ed1 m\u00f4i tr\u01b0\u1eddng v\u00e0 c\u01a1 h\u1ecdc c\u1ee5 th\u1ec3 \u0111\u1ec3 gh\u00e9p \u0111\u00fang h\u1ee3p kim t\u1eeb v\u1edbi th\u00f4ng s\u1ed1 hi\u1ec7u su\u1ea5t m\u1ee5c ti\u00eau c\u1ee7a b\u1ea1n.<\/p>\n<h3>C\u00e1c bi\u1ebfn thi\u1ebft k\u1ebf ch\u00ednh<\/h3>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Bi\u1ebfn \u0111\u1ed5i<\/th>\n<th style=\"text-align: left;\">T\u00e1c \u0111\u1ed9ng k\u1ef9 thu\u1eadt<\/th>\n<th style=\"text-align: left;\">C\u00e1c xem x\u00e9t Primary<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh<\/strong><\/td>\n<td style=\"text-align: left;\">Ki\u1ec3m so\u00e1t r\u1ee7i ro m\u1ea5t t\u1eeb<\/td>\n<td style=\"text-align: left;\">\u0110i\u1ec3m Curie gi\u1edbi h\u1ea1n, h\u1ec7 s\u1ed1 nhi\u1ec7t c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Nguy c\u01a1 \u0103n m\u00f2n<\/strong><\/td>\n<td style=\"text-align: left;\">\u0110\u1ecdc ph\u1ed1i h\u1ee3p l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7<\/td>\n<td style=\"text-align: left;\">Ti\u1ebfp x\u00fac h\u00f3a ch\u1ea5t, \u0111\u1ed9 \u1ea9m, kh\u00e1ng x\u1ed1c mu\u1ed1i<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Y\u00eau c\u1ea7u L\u1ef1c N\u1eafm gi\u1eef<\/strong><\/td>\n<td style=\"text-align: left;\">X\u00e1c \u0111\u1ecbnh h\u00ecnh h\u1ecdc v\u1eadt l\u00fd<\/td>\n<td style=\"text-align: left;\">Dung l\u01b0\u1ee3ng ch\u1ecbu t\u1ea3i c\u01a1 h\u1ecdc, kho\u1ea3ng c\u00e1ch kh\u00f4ng kh\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>M\u1eadt \u0111\u1ed9 l\u01b0u l\u01b0\u1ee3ng t\u1eeb<\/strong><\/td>\n<td style=\"text-align: left;\">\u0110\u01b0a hi\u1ec7u su\u1ea5t ho\u1ea1t \u0111\u1ed9ng l\u00ean<\/td>\n<td style=\"text-align: left;\">M\u1ee9c Gauss\/Tesla m\u1ee5c ti\u00eau, b\u00e3o h\u00f2a m\u1ea1ch<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>H\u1ee3p nh\u1ea5t kim lo\u1ea1i v\u00e0o c\u1ea5u ki\u1ec7n t\u00f9y ch\u1ec9nh<\/h3>\n<p>Ch\u00fang t\u00f4i t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u qu\u1ea3 m\u1ea1ch b\u1eb1ng c\u00e1ch t\u00edch h\u1ee3p nam ch\u00e2m hi\u1ec7u su\u1ea5t cao v\u00e0o b\u1ea3ng l\u01b0ng th\u00e9p t\u00f9y ch\u1ec9nh, cao su b\u1ea3o v\u1ec7, nh\u1ef1a \u0111\u00fac ho\u1eb7c v\u1ecf kim lo\u1ea1i ch\u00ednh x\u00e1c. K\u1ebft h\u1ee3p c\u00e1c t\u1ea5m th\u00e9p m\u1ec1m t\u1eeb tr\u01b0\u1eddng v\u1edbi nam ch\u00e2m v\u0129nh vi\u1ec5n d\u1eabn \u0111\u01b0\u1eddng flux \u0111\u1ec3 t\u1eadp trung l\u1ef1c gi\u1eef \u0111\u00fang n\u01a1i b\u1ea1n c\u1ea7n<\/p>\n<p>\u0110\u1ed1i v\u1edbi tr\u01b0\u1eddng t\u1eeb c\u00f3 h\u01b0\u1edbng \u0111\u1eb7c bi\u1ec7t, ch\u00fang t\u00f4i h\u1ee3p t\u00e1c v\u1edbi m\u1ed9t <a href=\"https:\/\/nbaem.com\/vi\/custom-halbach-array-permanent-magnet-manufacturer\/\">m\u1ea3ng Halbach t\u00f9y ch\u1ec9nh \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t nam ch\u00e2m<\/a> \u0111\u1ec3 t\u1eadp trung flux t\u1eeb v\u00e0o m\u1ed9t ph\u00eda l\u00e0m vi\u1ec7c trong khi gi\u1ea3m tr\u01b0\u1eddng nhi\u1ec5u v\u1ec1 g\u1ea7n b\u1eb1ng 0 \u1edf ph\u00eda \u0111\u1ed1i di\u1ec7n<\/p>\n<h3>Ti\u00eau chu\u1ea9n s\u1ea3n xu\u1ea5t &amp; Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng<\/h3>\n<p>C\u00e1c qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ee7a ch\u00fang t\u00f4i tu\u00e2n th\u1ee7 nghi\u00eam ng\u1eb7t c\u00e1c y\u00eau c\u1ea7u c\u00f4ng nghi\u1ec7p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh l\u1eb7p l\u1ea1i gi\u1eefa c\u00e1c l\u00f4 v\u00e0 sai s\u1ed1 k\u00edch th\u01b0\u1edbc ch\u1eb7t ch\u1ebd:<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>ISO 9001 &amp; ISO 14001:<\/strong> Qu\u1ea3n l\u00fd ch\u1ea5t l\u01b0\u1ee3ng chu\u1ea9n h\u00f3a v\u00e0 tr\u00e1ch nhi\u1ec7m m\u00f4i tr\u01b0\u1eddng.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng ISO\/TS16949:<\/strong> Quy tr\u00ecnh s\u1ea3n xu\u1ea5t \u1edf c\u1ea5p \u0111\u1ed9 \u00f4 t\u00f4 nghi\u00eam ng\u1eb7t.<\/li>\n<li><strong>X\u00e1c minh c\u1ea5p \u0111\u1ed9 PPAP 3:<\/strong> T\u00e0i li\u1ec7u Quy tr\u00ecnh ph\u00ea duy\u1ec7t chi ti\u1ebft S\u1ea3n ph\u1ea9m s\u1ea3n xu\u1ea5t (Production Part Approval Process), bao g\u1ed3m b\u00e1o c\u00e1o \u0111o l\u01b0\u1eddng \u0111\u1ea7y \u0111\u1ee7 v\u00e0 ch\u1ee9ng nh\u1eadn th\u1eed nghi\u1ec7m v\u1eadt li\u1ec7u.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>\u0110\u01b0\u1eddng d\u1eabn Ngu\u1ed3n cung \u1ee9ng &amp; L\u1ed9 tr\u00ecnh Prototyping<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Th\u00f4ng s\u1ed1 v\u1eadt li\u1ec7u t\u00f9y ch\u1ec9nh:<\/strong> \u0110i\u1ec1u ch\u1ec9nh c\u1ea5p \u0111\u1ed9 h\u1ee3p kim d\u1ef1a tr\u00ean y\u00eau c\u1ea7u nhi\u1ec7t, c\u01a1 h\u1ecdc v\u00e0 flux.<\/li>\n<li><strong>M\u00f4 h\u00ecnh CAD &amp; M\u00f4 ph\u1ecfng FEA:<\/strong> M\u00f4 ph\u1ecfng \u0111\u01b0\u1eddng \u0111i m\u1eadt \u0111\u1ed9 flux \u0111\u1ec3 ng\u0103n th\u1ea5t tho\u00e1t l\u1ec7ch v\u00e0 t\u1ed1i \u01b0u hi\u1ec7u su\u1ea5t.<\/li>\n<li><strong>\u0110\u00e1nh gi\u00e1 nguy\u00ean m\u1eabu:<\/strong> S\u1ea3n xu\u1ea5t m\u1eabu nhanh, x\u00e1c nh\u1eadn c\u01a1 h\u1ecdc v\u00e0 th\u1eed nghi\u1ec7m Gauss.<\/li>\n<li><strong>S\u1ea3n xu\u1ea5t quy m\u00f4:<\/strong> C\u00f4ng c\u1ee5 v\u00e0 l\u1ecbch tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o th\u1eddi gian d\u1eabn ng\u1eafn.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>Li\u1ec7u kim lo\u1ea1i phi t\u1eeb c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh t\u1eeb t\u00ednh d\u01b0\u1edbi m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n hay kh\u00f4ng?<\/h3>\n<p>C\u00f3. Inox austenitic phi t\u1eeb t\u00ednh (lo\u1ea1i 300) tr\u1edf n\u00ean t\u1eeb t\u00ednh y\u1ebfu khi b\u1ecb gia c\u00f4ng l\u1ea1nh, u\u1ed1n cong m\u1ea1nh ho\u1eb7c gia c\u00f4ng. Nhi\u1ec5m \u1ee9ng c\u01a1 h\u1ecdc bi\u1ebfn m\u1ea1ng tinh th\u1ec3 m\u1eb7t vu\u00f4ng l\u1eadp (FCC) c\u1ee7a n\u00f3 th\u00e0nh m\u1ed9t c\u1ea5u tr\u00fac martensitic t\u1eeb t\u00ednh. Ngo\u00e0i ra, kim lo\u1ea1i paramagnetic nh\u01b0 nh\u00f4m th\u1ec3 hi\u1ec7n s\u1ef1 h\u1ea5p d\u1eabn t\u1eeb t\u00ednh t\u1ea1m th\u1eddi khi ti\u1ebfp x\u00fac v\u1edbi tr\u01b0\u1eddng t\u1eeb m\u1ea1nh c\u00f3 n\u0103ng l\u01b0\u1ee3ng cao ho\u1eb7c \u1edf nhi\u1ec7t \u0111\u1ed9 cryogenic.<\/p>\n<h3>Nh\u1eefng kim lo\u1ea1i t\u1eeb t\u00ednh c\u00f3 kh\u1ea3 n\u0103ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec7t nh\u01b0 th\u1ebf n\u00e0o khi \u0111\u01b0\u1ee3c nung?<\/h3>\n<p>N\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t l\u00e0m r\u1ed1i lo\u1ea1n s\u1ef1 c\u0103n ch\u1ec9nh c\u1ee7a c\u00e1c mi\u1ec1n t\u1eeb. Khi nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u0103ng, m\u1eadt \u0111\u1ed9 t\u1eeb th\u00f4ng v\u00e0 d\u01b0 t\u1eeb gi\u1ea3m. Khi m\u1ed9t v\u1eadt li\u1ec7u \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c \u0111\u1eb7c bi\u1ec7t c\u1ee7a n\u00f3 <strong>Nhi\u1ec7t \u0111\u1ed9 Curie<\/strong>, s\u1eaft t\u1eeb b\u1ecb ph\u00e1 h\u1ee7y ho\u00e0n to\u00e0n, bi\u1ebfn kim lo\u1ea1i th\u00e0nh paramagnetic:<br \/>\n<strong>S\u1eaft tinh khi\u1ebft (Fe):<\/strong> 770\u00b0C<br \/>\n<strong>Cobalt (Co):<\/strong> 1121\u00b0C<br \/>\n<strong>Nam ch\u00e2m Neodymium (NdFeB):<\/strong> 310\u00b0C \u0111\u1ebfn 400\u00b0C (t\u00f9y v\u00e0o ph\u1ee5 gia \u1edf m\u1ee9c \u0111\u1ed9 dysprosium\/terbium)<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa v\u1eadt li\u1ec7u t\u1eeb c\u1ee9ng v\u00e0 m\u1ec1m trong l\u00f5i \u0111\u1ed9ng c\u01a1 l\u00e0 g\u00ec?<\/h3>\n<p>Ch\u00fang t\u00f4i ph\u00e2n lo\u1ea1i v\u1eadt li\u1ec7u t\u1eeb th\u00e0nh hai lo\u1ea1i c\u1ee9ng v\u00e0 m\u1ec1m d\u1ef1a tr\u00ean \u0111\u1ed9 d\u01b0 t\u1eeb v\u00e0 kh\u1ea3 n\u0103ng gi\u1eef n\u0103ng l\u01b0\u1ee3ng t\u1eeb.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th style=\"text-align: left;\">V\u1eadt li\u1ec7u t\u1eeb m\u1ec1m<\/th>\n<th style=\"text-align: left;\">V\u1eadt li\u1ec7u t\u1eeb c\u1ee9ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Ch\u1ee9c n\u0103ng ch\u1ee7 \u0111\u1ea1o<\/strong><\/td>\n<td style=\"text-align: left;\">D\u1eabn h\u01b0\u1edbng v\u00e0 khu\u1ebfch \u0111\u1ea1i t\u1eeb l\u01b0\u1ee3ng v\u1edbi t\u1ed5n th\u1ea5t n\u0103ng l\u01b0\u1ee3ng t\u1ed1i thi\u1ec3u<\/td>\n<td style=\"text-align: left;\">T\u1ea1o ra tr\u01b0\u1eddng t\u1eeb t\u00ednh li\u00ean t\u1ee5c, b\u1ec1n b\u1ec9<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb<\/strong><\/td>\n<td style=\"text-align: left;\">Th\u1ea5p (l\u00e0m t\u1eeb h\u00f3a v\u00e0 m\u1ea5t t\u1eeb t\u00ednh nhanh ch\u00f3ng)<\/td>\n<td style=\"text-align: left;\">Cao (kh\u00e1ng m\u1ea5t t\u1eeb r\u1ea5t m\u1ea1nh)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>H\u1ee3p kim ph\u1ed5 bi\u1ebfn<\/strong><\/td>\n<td style=\"text-align: left;\">Th\u00e9p silic l\u00e0 th\u00e9p silicon, s\u1eaft m\u1ec1m, l\u00f5i ferrite<\/td>\n<td style=\"text-align: left;\">NdFeB (D\u00f2ng NdFeB), Samarium-Cobalt, AlNiCo<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u1ee8ng d\u1ee5ng ch\u00ednh<\/strong><\/td>\n<td style=\"text-align: left;\">L\u00f5i \u0111\u1ed3ng b\u1ed9 h\u00f3a \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n, bi\u1ebfn \u00e1p, <a href=\"https:\/\/nbaem.com\/vi\/what-is-mining-magnetic-coupling-and-how-it-works\/\">kh\u1edbp n\u1ed1i t\u1eeb tr\u01b0\u1eddng t\u1eeb t\u00ednh<\/a> \u0111i\u1ec7n \u0111\u1ed9ng c\u01a1<\/td>\n<td style=\"text-align: left;\">Rotor nam ch\u00e2m v\u0129nh c\u1eedu, b\u1ed9 t\u00e1ch t\u1eeb, c\u1ea3m bi\u1ebfn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>B\u1ea1n ki\u1ec3m tra kim lo\u1ea1i h\u1ee3p kim\u672a\u77e5 c\u00f3 t\u1eeb t\u00ednh m\u00e0 kh\u00f4ng c\u00f3 d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Ki\u1ec3m tra nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm:<\/strong> Ch\u1ea1m m\u1ed9t nam ch\u00e2m Neodymium m\u1ea1nh l\u00ean m\u1eabu kim lo\u1ea1i. L\u1ef1c h\u00fat ngay l\u1eadp t\u1ee9c v\u00e0 m\u1ea1nh cho th\u1ea5y kim lo\u1ea1i t\u1eeb (th\u00e9p cacbon, th\u00e9p kh\u00f4ng g\u1ec9 400-series). L\u1ef1c h\u00fat y\u1ebfu cho th\u1ea5y th\u00e9p kh\u00f4ng g\u1ec9 304 ho\u1eb7c 316 \u0111\u01b0\u1ee3c gia c\u00f4ng l\u1ea1nh.<\/li>\n<li><strong>Ki\u1ec3m tra ma s\u00e1t d\u00f2ng xo\u00e1y:<\/strong> G\u00f3c \u0111\u1eb7t t\u1ea5m kim lo\u1ea1i kh\u00f4ng t\u1eeb t\u00ednh unknown \u1edf 45 \u0111\u1ed9 v\u00e0 tr\u01b0\u1ee3t nam ch\u00e2m d\u1ecdc theo b\u1ec1 m\u1eb7t. C\u00e1c kim lo\u1ea1i kh\u00f4ng t\u1eeb t\u00ednh c\u00f3 \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n cao (\u0111\u1ed3ng, nh\u00f4m) t\u1ea1o ra d\u00f2ng xo\u00e1y \u0111\u1ed1i kh\u00e1ng khi\u1ebfn nam ch\u00e2m tr\u01b0\u1ee3t xu\u1ed1ng ch\u1eadm.<\/li>\n<li><strong>Ki\u1ec3m tra tia l\u1eeda m\u00e1y m\u00e0i:<\/strong> Ch\u1ea1m nh\u1eb9 kim lo\u1ea1i l\u00ean b\u00e1nh xe m\u00e0i. C\u00e1c kim lo\u1ea1i t\u1eeb t\u00ednh d\u1ef1a tr\u00ean s\u1eaft t\u1ea1o ra tia l\u1eeda v\u00e0ng to v\u00e0 d\u00e0i, trong khi kim lo\u1ea1i kh\u00f4ng t\u1eeb t\u00ednh nh\u01b0 nh\u00f4m, \u0111\u1ed3ng v\u00e0 titanium s\u1ebd kh\u00f4ng t\u1ea1o tia l\u1eeda.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<div id=\"references\">\n<h2>Ngu\u1ed3n li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.magnet4sale.com\/what-is-the-strongest-permanent-magnet-comparison-of-neodymium-ceramic-smco-and-alnico-magnets\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.magnet4sale.com\/what-is-the-strongest-permanent-magnet-comparison-of-neodymium-ceramic-smco-and-alnico-magnets\/<\/a><\/li>\n<\/ul>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>C\u00e1c kim lo\u1ea1i n\u00e0o l\u00e0 v\u1eadt li\u1ec7u t\u1eeb t\u00ednh H\u1ecdc v\u1ec1 s\u1eaft, niken, coban, th\u00e9p v\u00e0 kim lo\u1ea1i phi t\u1eeb t\u00ednh m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng, nhanh ch\u00f3ng<\/p>","protected":false},"author":1,"featured_media":3978,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3979","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2026\/08\/Ferromagnetic_metals_diagram_ZS1.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/comments?post=3979"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3979\/revisions"}],"predecessor-version":[{"id":3994,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3979\/revisions\/3994"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/3978"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=3979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=3979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=3979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}