{"id":3889,"date":"2026-07-02T09:11:41","date_gmt":"2026-07-02T09:11:41","guid":{"rendered":"https:\/\/nbaem.com\/?p=3889"},"modified":"2026-06-21T01:42:01","modified_gmt":"2026-06-21T01:42:01","slug":"powerful-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/powerful-magnets\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt v\u1ec1 nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 c\u1ee9ng"},"content":{"rendered":"<h2>Nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 \u0111\u0129a l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/h2>\n<p>N\u1ebfu b\u1ea1n t\u1eebng th\u00e1o r\u1eddi m\u1ed9t m\u00e1y t\u00ednh c\u0169, c\u00f3 th\u1ec3 b\u1ea1n \u0111\u00e3 t\u1ef1 h\u1ecfi v\u1ec1 c\u00e1c th\u00e0nh ph\u1ea7n v\u00f4 c\u00f9ng m\u1ea1nh \u0111ang \u1ea9n ch\u1ee9a b\u00ean trong. Lo\u1ea1i nam ch\u00e2m n\u00e0o \u1edf b\u00ean trong \u1ed5 c\u1ee9ng? \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 nam ch\u00e2m t\u1ee7 l\u1ea1nh th\u00f4ng th\u01b0\u1eddng. C\u00e1c \u1ed5 \u0111\u0129a c\u1ee9ng c\u01a1 h\u1ecdc truy\u1ec1n th\u1ed1ng (HDD) d\u1ef1a v\u00e0o m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u nam ch\u00e2m m\u1ea1nh nh\u1ea5t tr\u00ean h\u00e0nh tinh \u0111\u1ec3 \u0111\u1ecdc, ghi v\u00e0 b\u1ea3o v\u1ec7 cu\u1ed9c s\u1ed1ng s\u1ed1 c\u1ee7a b\u1ea1n.<\/p>\n<h3>Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc v\u00e0 v\u1eadt li\u1ec7u<\/h3>\n<p>S\u1ee9c m\u1ea1nh th\u00f4 c\u1ee7a nh\u1eefng th\u00e0nh ph\u1ea7n n\u00e0y ph\u1ee5 thu\u1ed9c v\u00e0o <strong>v\u1eadt li\u1ec7u nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm<\/strong>. \u1ed4 \u0111\u0129a c\u1ee9ng s\u1eed d\u1ee5ng \u0111\u1ed9c quy\u1ec1n <strong>nam ch\u00e2m v\u0129nh c\u1eedu sintered<\/strong> l\u00e0m t\u1eeb m\u1ed9t h\u1ee3p kim c\u1ee5 th\u1ec3: <strong>Neodymium S\u1eaft Boron (NdFeB)<\/strong>.<\/p>\n<ul>\n<li><strong>Neodymi (Nd):<\/strong> M\u1ed9t y\u1ebfu t\u1ed1 \u0111\u1ea5t hi\u1ebfm cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb t\u00ednh v\u01b0\u1ee3t tr\u1ed9i.<\/li>\n<li><strong>S\u1eaft (Fe):<\/strong> Y\u1ebfu t\u1ed1 ferromagnetic ch\u00ednh t\u0103ng c\u01b0\u1eddng \u0111\u1ea7u ra t\u1eeb t\u00ednh t\u1ed5ng th\u1ec3.<\/li>\n<li><strong>Bo (B):<\/strong> M\u1ed9t y\u1ebfu t\u1ed1 \u1ed5n \u0111\u1ecbnh kh\u00f3a c\u1ea5u tr\u00fac tinh th\u1ec3 v\u00e0o v\u1ecb tr\u00ed cho hi\u1ec7u su\u1ea5t cao.<\/li>\n<\/ul>\n<h3>Ch\u1ec9 s\u1ed1 c\u00f4ng su\u1ea5t (Gauss &amp; Tesla)<\/h3>\n<p>Ch\u00fang t\u00f4i \u0111o kh\u1ea3 n\u0103ng c\u1ee7a nh\u1eefng <strong>nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/strong> s\u1eed d\u1ee5ng hai \u0111\u01a1n v\u1ecb ch\u00ednh: <strong>Gauss<\/strong> v\u00e0 <strong>Tesla<\/strong> (1 TP4T1\\text{ Tesla} = 10,000\\text{ Gauss}$).<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Lo\u1ea1i nam ch\u00e2m<\/th>\n<th style=\"text-align: left;\">M\u1ee9c \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng b\u1ec1 m\u1eb7t trung b\u00ecnh<\/th>\n<th style=\"text-align: left;\">C\u00f4ng c\u1ee5 l\u00f5i trong c\u00f4ng ngh\u1ec7<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\">Nam ch\u00e2m ferrite ti\u00eau chu\u1ea9n<\/td>\n<td style=\"text-align: left;\">T\u1eeb 1,000 \u0111\u1ebfn 2,000 Gauss<\/td>\n<td style=\"text-align: left;\">Nam ch\u00e2m t\u1ee7 l\u1ea1nh, loa c\u01a1 b\u1ea3n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Nam ch\u00e2m Neodymium cho HDD<\/strong><\/td>\n<td style=\"text-align: left;\"><strong>T\u1eeb 4,000 \u0111\u1ebfn 5,500 Gauss<\/strong><\/td>\n<td style=\"text-align: left;\"><strong>V\u1ecb tr\u00ed c\u00e1nh\u2013c\u00e1c b\u1ed9 truy\u1ec1n \u0111\u1ed9ng, VCM<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u00e1c th\u00e0nh ph\u1ea7n NdFeB \u1edf c\u1ea5p c\u00f4ng nghi\u1ec7p c\u1ee7a ch\u00fang t\u00f4i cung c\u1ea5p m\u1ed9t m\u1eadt \u0111\u1ed9 tr\u01b0\u1eddng t\u1eeb c\u1ef1c k\u1ef3 t\u1eadp trung <strong>m\u1ea1nh t\u1eeb tr\u01b0\u1eddng (Gauss)<\/strong>. N\u0103ng l\u01b0\u1ee3ng d\u00e0y \u0111\u1eb7c l\u1edbn \u0111\u1ebfn m\u1ee9c cho ph\u00e9p c\u01a1 c\u1ea5u b\u00ean trong c\u1ee7a \u1ed5 \u0111\u0129a di chuy\u1ec3n v\u1edbi t\u1ed1c \u0111\u1ed9 nhanh nh\u01b0 ch\u1edbp v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c \u1edf m\u1ee9c vi m\u00f4.<\/p>\n<h3>L\u1edbp ph\u1ee7 c\u1ea5u tr\u00fac v\u00e0 b\u1ea3o v\u1ec7 d\u1ec5 v\u1ee1<\/h3>\n<p>Trong khi v\u1eadt li\u1ec7u NdFeB th\u00f4 cung c\u1ea5p s\u1ee9c m\u1ea1nh v\u01b0\u1ee3t tr\u1ed9i, n\u00f3 c\u00f3 hai \u0111i\u1ec3m y\u1ebfu ch\u00ednh: d\u1ec5 b\u1ecb \u0103n m\u00f2n v\u00e0 c\u1ea5u tr\u00fac d\u1ec5 v\u1ee1. N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7, nam ch\u00e2m c\u00f3 th\u1ec3 oxi h\u00f3a th\u00e0nh b\u1ee5i ho\u1eb7c v\u1ee1 v\u1ee5n d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1ea3i tr\u1ecdng c\u01a1 h\u1ecdc.<\/p>\n<p>\u0110\u1ec3 gi\u1ea3i quy\u1ebft \u0111i\u1ec1u n\u00e0y, ch\u00fang t\u00f4i thi\u1ebft k\u1ebf nh\u1eefng nam ch\u00e2m n\u00e0y v\u1edbi l\u1edbp b\u1ea3o v\u1ec7 n\u1eb7ng <strong>L\u1edbp ph\u1ee7 Nickel-Copper-Nickel (Ni-Cu-Ni)<\/strong>. L\u1edbp b\u1ea3o v\u1ec7 \u0111i\u1ec7n plating nhi\u1ec1u l\u1edbp n\u00e0y ng\u0103n n\u01b0\u1edbc x\u00e2m nh\u1eadp, ng\u0103n ch\u1ed7 bong tr\u00f3c v\u00e0 \u0111\u1ea3m b\u1ea3o nam ch\u00e2m s\u1ed1ng s\u00f3t trong m\u00f4i tr\u01b0\u1eddng n\u1ed9i b\u1ed9 gay g\u1eaft c\u1ee7a \u1ed5 \u0111\u0129a l\u01b0u tr\u1eef d\u1eef li\u1ec7u \u1edf t\u1ed1c \u0111\u1ed9 cao.<\/p>\n<h2>Hai ch\u1ee9c n\u0103ng then ch\u1ed1t c\u1ee7a nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 c\u1ee9ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/h2>\n<p>C\u00e1c \u1ed5 \u0111\u0129a c\u1ee9ng truy\u1ec1n th\u1ed1ng d\u1ef1a v\u00e0o \u0111\u1ed9 chu\u1ea9n x\u00e1c c\u1ef1c k\u1ef3 cao \u0111\u1ec3 \u0111\u1ecdc v\u00e0 ghi d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng c\u00e1c th\u00e0nh ph\u1ea7n n\u1ed9i b\u1ed9 tinh vi. B\u00ean trong nh\u1eefng \u1ed5 \u0111\u0129a n\u00e0y, <strong>nam ch\u00e2m v\u0129nh c\u1eedu sintered<\/strong> th\u1ef1c hi\u1ec7n hai ch\u1ee9c n\u0103ng then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t d\u1eef li\u1ec7u li\u00ean t\u1ee5c.<\/p>\n<h3>H\u1ec7 th\u1ed1ng \u0110\u1ed9ng c\u01a1 Cu\u1ed9n \u00c2m thanh (VCM)<\/h3>\n<p>Nhi\u1ec7m v\u1ee5 ch\u00ednh c\u1ee7a c\u00e1c nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 c\u1ee9ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u l\u00e0 \u0111i\u1ec1u khi\u1ec3n <strong>\u0110\u1ed9ng c\u01a1 Cu\u1ed9n \u00c2m thanh (VCM)<\/strong>. VCM \u0111i\u1ec1u khi\u1ec3n <strong>v\u1ecb tr\u00ed c\u1ee7a c\u00e1nh tay \u0111i\u1ec1u khi\u1ec3n<\/strong> v\u1edbi t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c tuy\u1ec7t v\u1eddi.<\/p>\n<ul>\n<li><strong>T\u01b0\u01a1ng t\u00e1c \u0111i\u1ec7n t\u1eeb:<\/strong> C\u00e1nh bim rung gi\u1eef m\u1ed9t cu\u1ed9n d\u00e2y. Khi \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n d\u00e2y n\u00e0y, n\u00f3 t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb bi\u1ebfn thi\u00ean.<\/li>\n<li><strong>V\u1ecb tr\u00ed t\u1ed1c \u0111\u1ed9 cao:<\/strong> Tr\u01b0\u1eddng n\u00e0y t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c nam ch\u00e2m neodymium c\u1ed1 \u0111\u1ecbnh v\u00f4 c\u00f9ng m\u1ea1nh, bu\u1ed9c c\u00e1nh tay di chuy\u1ec3n qua l\u1ea1i tr\u00ean c\u00e1c \u0111\u0129a l\u01b0u tr\u1eef t\u1eeb t\u00ednh \u0111ang quay <strong>nh\u1eefng \u0111\u0129a l\u01b0u tr\u1eef t\u1eeb t\u00ednh quay<\/strong>.<\/li>\n<li><strong>Ki\u1ec3m so\u00e1t ch\u00ednh x\u00e1c:<\/strong> C\u00e0i \u0111\u1eb7t n\u00e0y cho ph\u00e9p \u1ed5 \u0111\u0129a \u0111\u1ecbnh v\u1ecb \u0111\u1ea7u \u0111\u1ecdc-ghi tr\u00ean c\u00e1c \u0111\u01b0\u1eddng d\u1eef li\u1ec7u c\u00f3 chi\u1ec1u r\u1ed9ng ch\u1ec9 \u1edf nano m\u00e9t trong mili gi\u00e2y.<\/li>\n<\/ul>\n<h3>\u0110\u1ed9ng c\u01a1 tr\u1ee5c v\u00e0 C\u01a1 h\u1ecdc \u0111\u1ea7u \u0111\u1ecdc-ghi<\/h3>\n<p>Ngo\u00e0i vi\u1ec7c \u0111\u1ecbnh v\u1ecb c\u00e1nh tay, v\u1eadt li\u1ec7u t\u1eeb v\u1eadt li\u1ec7u hi\u1ebfm c\u00f3 vai tr\u00f2 thi\u1ebft y\u1ebfu trong vi\u1ec7c qu\u1ea3n l\u00fd s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u01a1 h\u1ecdc t\u1ed5ng th\u1ec3 b\u00ean trong khung \u1ed5 \u0111\u0129a.<\/p>\n<ul>\n<li><strong>\u0110\u1ed3ng b\u1ed9 h\u00f3a \u0111\u1ed9ng c\u01a1 tr\u1ee5c:<\/strong> Nam ch\u00e2m hi\u1ec7u su\u1ea5t cao gi\u00fap \u1ed5n \u0111\u1ecbnh \u0111\u1ed9ng c\u01a1 tr\u1ee5c, \u0111\u1ea3m b\u1ea3o c\u00e1c \u0111\u0129a l\u01b0u tr\u1eef quay v\u1edbi t\u1ed1c \u0111\u1ed9 ho\u00e0n to\u00e0n \u1ed5n \u0111\u1ecbnh (th\u00f4ng th\u01b0\u1eddng 5.400 ho\u1eb7c 7.200 RPM) m\u00e0 kh\u00f4ng rung l\u1eafc.<\/li>\n<li><strong>Duy tr\u00ec chi\u1ec1u cao bay:<\/strong> C\u01a1 h\u1ecdc \u0111\u1ea9y\u2013k\u00e9o \u0111\u01b0\u1ee3c \u0111i\u1ec1u khi\u1ec3n b\u1edfi VCM gi\u1eef cho \u0111\u1ea7u \u0111\u1ecdc-ghi l\u01a1 l\u1eedng ch\u1ec9 tr\u00ean m\u1ee9c vi m\u00f4 tr\u00ean b\u1ec1 m\u1eb7t \u0111\u0129a. \u0110i\u1ec1u n\u00e0y ng\u0103n ti\u1ebfp x\u00fac v\u1eadt l\u00fd, \u0111i\u1ec1u n\u00e0y s\u1ebd g\u00e2y h\u1ecfng d\u1eef li\u1ec7u v\u00e0 h\u1ecfng \u1ed5 \u0111\u0129a ngay l\u1eadp t\u1ee9c.<\/li>\n<\/ul>\n<p>\u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 ch\u00ednh x\u00e1c c\u01a1 h\u1ecdc n\u00e0y, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t d\u1ef1a v\u00e0o tolerances s\u1ea3n xu\u1ea5t c\u1ef1c k\u1ef3 ch\u00ednh x\u00e1c. C\u00e1c quy tr\u00ecnh ti\u00ean ti\u1ebfn nh\u01b0 c\u00e1c <a href=\"https:\/\/nbaem.com\/vi\/magnet-machining\/\">gia c\u00f4ng nam ch\u00e2m<\/a> \u0111\u1ea3m b\u1ea3o c\u00e1c kh\u1ed1i sintered \u0111\u01b0\u1ee3c c\u1eaft theo c\u00e1c th\u00f4ng s\u1ed1 h\u00ecnh h\u1ecdc ch\u00ednh x\u00e1c c\u1ea7n thi\u1ebft \u0111\u1ec3 v\u1eeba v\u1edbi c\u00e1c h\u1ed9p \u0111\u1ef1ng nh\u1ecf g\u1ecdn m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t \u0111\u1ed3ng nh\u1ea5t tr\u01b0\u1eddng.<\/p>\n<h2>Th\u00f4ng s\u1ed1 K\u1ef9 thu\u1eadt \u0110\u0129a C\u1ee9ng t\u1eeb tr\u01b0\u1eddng t\u1eeb<\/h2>\n<p>Hi\u1ec3u c\u00e1c ch\u1ec9 s\u1ed1 th\u00f4 c\u1ee7a <strong>nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/strong> cho th\u1ea5y v\u00ec sao ch\u00fang hi\u1ec7u qu\u1ea3 \u0111\u1ebfn v\u1eady trong \u0111\u1ecbnh v\u1ecb d\u1eef li\u1ec7u \u1edf t\u1ed1c \u0111\u1ed9 cao. Nh\u1eefng nam ch\u00e2m v\u0129nh vi\u1ec5n k\u1ebft tinh n\u00e0y d\u1ef1a v\u00e0o c\u00e1c tham s\u1ed1 h\u00f3a h\u1ecdc v\u00e0 v\u1eadt l\u00fd ch\u00ednh x\u00e1c \u0111\u1ec3 duy tr\u00ec s\u1ef1 \u1ed5n \u0111\u1ecbnh b\u00ean trong m\u1ed9t \u1ed5 \u0111\u0129a quay<\/p>\n<h3>Chi ti\u1ebft Tham s\u1ed1 Ch\u00ednh<\/h3>\n<p>\u1ed4 c\u1ee9ng nam ch\u00e2m ph\u1ea3i c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ea7u ra t\u1eeb tr\u01b0\u1eddng v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t. C\u00e1c th\u00f4ng s\u1ed1 ch\u00ednh m\u00e0 ch\u00fang t\u00f4i thi\u1ebft k\u1ebf cho c\u00e1c \u1ed5 \u0111\u0129a n\u00e0y bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Remanence ($B_r$):<\/strong> Tr\u01b0\u1eddng t\u1eeb d\u01b0 c\u00f2n l\u1ea1i khi l\u1ef1c t\u1eeb \u0111\u01b0\u1ee3c b\u1ecf \u0111i. Remanence cao cho ph\u00e9p thi\u1ebft k\u1ebf nam ch\u00e2m c\u00f4 \u0111\u1eb7c h\u01a1n.<\/li>\n<li><strong>Coercivity ($H_c$):<\/strong> Kh\u1ea3 n\u0103ng ch\u1ed1ng t\u1eeb b\u1ecb kh\u1eed t\u1eeb c\u1ee7a v\u1eadt li\u1ec7u t\u1eeb. \u0110\u1ed9 c\u01b0\u01a1ng t\u1eeb cao \u0111\u1ea3m b\u1ea3o nam ch\u00e2m gi\u1eef \u0111\u01b0\u1ee3c l\u1ef1c g\u1ea7n c\u00e1c tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb kh\u00e1c.<\/li>\n<li><strong>Maximum Energy Product ($(BH)_{max}$):<\/strong> N\u0103ng l\u01b0\u1ee3ng ri\u00eang t\u1ed5ng th\u1ec3 c\u1ee7a nam ch\u00e2m, quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng n\u00e2ng v\u00e0 gi\u1eef c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Specification Parameter<\/th>\n<th style=\"text-align: left;\">Typical HDD Range<\/th>\n<th style=\"text-align: left;\">Significance in Data Storage<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>Common Grades<\/strong><\/td>\n<td style=\"text-align: left;\">N42 to N52<\/td>\n<td style=\"text-align: left;\">X\u00e1c \u0111\u1ecbnh \u0111\u1ed9 d\u00e0y n\u0103ng l\u01b0\u1ee3ng v\u00e0 k\u00edch th\u01b0\u1edbc thu nh\u1ecf.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Surface Field Strength<\/strong><\/td>\n<td style=\"text-align: left;\">3.500 \u0111\u1ebfn 4.500 Gauss<\/td>\n<td style=\"text-align: left;\">Cung c\u1ea5p lu\u1ed3ng t\u1eeb tr\u01b0\u1eddng cao m\u1ea1nh c\u1ea7n thi\u1ebft cho \u0110\u1ed9ng c\u01a1 Cu\u1ed9n \u00c2m thanh.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>Kh\u1ea3 n\u0103ng c\u01b0\u1ee1ng ($H_{cj}$)<\/strong><\/td>\n<td style=\"text-align: left;\">$\\ge$ 12 kOe (Kilooersted)<\/td>\n<td style=\"text-align: left;\">Ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t t\u1eeb t\u00ednh ngo\u00e0i \u00fd mu\u1ed1n trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>C\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng b\u1ec1 m\u1eb7t v\u00e0 Kh\u1ea3 n\u0103ng c\u01b0\u1ee1ng<\/h3>\n<p>C\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng b\u1ec1 m\u1eb7t c\u1ee7a nh\u1eefng chi\u1ebfc n\u00e0y <strong>nam ch\u00e2m neodymium<\/strong> l\u00e0 r\u1ea5t cao so v\u1edbi k\u00edch th\u01b0\u1edbc c\u1ee7a ch\u00fang, th\u01b0\u1eddng \u0111o \u0111\u01b0\u1ee3c l\u00ean t\u1edbi 0,45 Tesla (4.500 Gauss) ngay t\u1ea1i m\u1eb7t c\u1ef1c. Tr\u01b0\u1eddng t\u1eeb m\u1ea1nh n\u00e0y \u0111\u01b0\u1ee3c t\u1eadp trung ch\u00ednh x\u00e1c b\u00ean trong v\u1ecf \u0111\u1ed9ng c\u01a1 nh\u1eb1m t\u1ed1i \u01b0u h\u00f3a th\u1eddi gian ph\u1ea3n h\u1ed3i c\u1ee7a c\u00e1nh tay t\u00e1c \u0111\u1ed9ng. V\u00ec \u1ed5 c\u1ee9ng t\u1ea1o nhi\u1ec7t n\u1ed9i b\u1ed9 trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng k\u00e9o d\u00e0i, vi\u1ec7c qu\u1ea3n l\u00fd <a href=\"https:\/\/nbaem.com\/vi\/high-temperature-magnets\/\">gi\u1edbi h\u1ea1n nhi\u1ec7t l\u00e0m m\u1ea5t t\u1eeb t\u00ednh<\/a> l\u00e0 m\u1ed9t y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt quan tr\u1ecdng. C\u00e1c c\u1ea5p \u0111\u1ed9 c\u00f3 \u0111\u1ed9 c\u01b0\u1ee1ng cao \u0111\u01b0\u1ee3c ch\u1ecdn c\u1ee5 th\u1ec3 \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t n\u00e0y m\u00e0 kh\u00f4ng l\u00e0m m\u1ea5t flux t\u1eeb, \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u v\u00e0 \u0111\u1ed9 tin c\u1eady c\u01a1 h\u1ecdc l\u00e2u d\u00e0i.<\/p>\n<h2>C\u00e1c nam ch\u00e2m b\u00ean ngo\u00e0i c\u00f3 th\u1ec3 x\u00f3a ho\u1eb7c ph\u00e1 h\u1ee7y \u1ed5 c\u1ee9ng?<\/h2>\n<p>C\u00f3 m\u1ed9t ni\u1ec1m tin ph\u1ed5 bi\u1ebfn cho r\u1eb1ng qu\u1ea9y m\u1ed9t nam ch\u00e2m gia \u0111\u00ecnh g\u1ea7n m\u00e1y t\u00ednh s\u1ebd ngay l\u1eadp t\u1ee9c x\u00f3a d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n. Trong khi \u0111i\u1ec1u n\u00e0y t\u1ea1o k\u1ecbch t\u00ednh cho phim \u1ea3nh, th\u1ef1c t\u1ebf v\u1ec1 c\u00e1ch <strong>nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/strong> t\u01b0\u01a1ng t\u00e1c v\u1edbi t\u1eeb tr\u01b0\u1eddng b\u00ean ngo\u00e0i l\u1ea1i ph\u1ee9c t\u1ea1p h\u01a1n nhi\u1ec1u.<\/p>\n<h3>Huy\u1ec1n tho\u1ea1i so v\u1edbi th\u1ef1c t\u1ebf<\/h3>\n<p>C\u00e1c \u1ed5 c\u1ee9ng hi\u1ec7n \u0111\u1ea1i (HDD) l\u00e0 nh\u1eefng thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt v\u00f4 c\u00f9ng b\u1ec1n b\u1ec9. D\u1eef li\u1ec7u tr\u00ean m\u1ed9t \u1ed5 HDD \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean <strong>nh\u1eefng \u0111\u0129a l\u01b0u tr\u1eef t\u1eeb t\u00ednh quay<\/strong>, \u0111\u00f2i h\u1ecfi l\u1ef1c ch\u00ednh x\u00e1c v\u00e0 t\u1eadp trung c\u1ef1c k\u1ef3 cao \u0111\u1ec3 c\u00f3 th\u1ec3 thay \u0111\u1ed5i. M\u1ed9t nam ch\u00e2m nh\u00e0 b\u1ebfp ti\u00eau chu\u1ea9n ho\u1eb7c th\u1eadm ch\u00ed m\u1ed9t nam ch\u00e2m v\u0103n ph\u00f2ng m\u1ea1nh c\u0169ng kh\u00f4ng c\u00f3 \u0111\u1ee7 c\u01b0\u1eddng \u0111\u1ed9 tr\u01b0\u1eddng t\u1eeb \u0111\u1ec3 xuy\u00ean qua v\u1ecf kim lo\u1ea1i n\u1eb7ng b\u1eb1ng th\u00e9p v\u00e0 nh\u00f4m c\u1ee7a m\u1ed9t \u1ed5 c\u1ee9ng. C\u00e1c t\u1ec7p tin h\u00e0ng ng\u00e0y c\u1ee7a b\u1ea1n ho\u00e0n to\u00e0n an to\u00e0n kh\u1ecfi ti\u1ebfp x\u00fac t\u1eeb t\u00ednh th\u00f4ng th\u01b0\u1eddng.<\/p>\n<h3>Ng\u01b0\u1ee1ng nguy hi\u1ec3m<\/h3>\n<p>\u0110\u1ec3 th\u1ef1c s\u1ef1 g\u00e2y ra <strong>r\u1ee7i ro l\u00e0m h\u1ecfng d\u1eef li\u1ec7u<\/strong> ho\u1eb7c x\u00f3a m\u1ed9t \u1ed5 \u0111\u0129a c\u1ee9ng, m\u1ed9t tr\u01b0\u1eddng t\u1eeb ngo\u00e0i ph\u1ea3i v\u01b0\u1ee3t qua l\u1ef1c kh\u00e1ng t\u1eeb n\u1ed9i t\u1ea1i c\u1ee7a \u1ed5 \u0111\u0129a.<\/p>\n<ul>\n<li>Nam ch\u00e2m neodymium ti\u00eau chu\u1ea9n c\u00f3 th\u1ec3 l\u00e0m r\u1ed1i lo\u1ea1n c\u01a1 h\u1ecdc b\u00ean trong\u2014nh\u01b0 g\u1eadp cong h\u1ec7 th\u1ed1ng <strong>v\u1ecb tr\u00ed c\u1ee7a c\u00e1nh tay \u0111i\u1ec1u khi\u1ec3n<\/strong> h\u1ec7 th\u1ed1ng ho\u1eb7c g\u00e2y h\u1ecfng \u0111\u1ea7u \u0111\u1ecdc-ghi nh\u1ea1y c\u1ea3m\u2014tr\u01b0\u1edbc c\u1ea3 khi ch\u00fang th\u1ef1c s\u1ef1 x\u00f3a d\u1eef li\u1ec7u tr\u00ean c\u00e1c \u0111\u0129a s\u1eed d\u1ee5ng.<\/li>\n<li>\u0110\u1ec3 x\u00f3a d\u1eef li\u1ec7u b\u1eb1ng t\u1eeb t\u00ednh m\u00e0 kh\u00f4ng ch\u1ea1m v\u00e0o c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong, b\u1ea1n c\u1ea7n t\u1ea1o m\u1ed9t tr\u01b0\u1eddng t\u1eeb m\u1ea1nh m\u1ea1\u0302t v\u00e0 c\u00f3 quy m\u00f4 c\u00f4ng nghi\u1ec7p (th\u00f4ng th\u01b0\u1eddng l\u00ean t\u1edbi tr\u00ean 10.000 Gauss) \u0111\u01b0\u1ee3c t\u00e1c d\u1ee5ng tr\u1ef1c ti\u1ebfp l\u00ean \u1ed5 \u0111\u0129a.<\/li>\n<\/ul>\n<h3>Xo\u00e1 t\u1eeb c\u00f4ng nghi\u1ec7p<\/h3>\n<p>Khi y\u00eau c\u1ea7u ph\u00e1 h\u1ee7y d\u1eef li\u1ec7u tuy\u1ec7t \u0111\u1ed1i cho c\u00e1c m\u00f4i tr\u01b0\u1eddng an to\u00e0n cao, c\u00e1c c\u00f4ng ty d\u1ef1a v\u00e0o <strong>x\u00f3a t\u1eeb d\u1eef li\u1ec7u b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p kh\u1eed t\u1eeb (degaussing)<\/strong> thi\u1ebft b\u1ecb. C\u00e1c m\u00e1y kh\u1eed t\u1eeb c\u00f4ng nghi\u1ec7p t\u1ea1o ra m\u1ed9t xung \u0111i\u1ec7n t\u1eeb m\u1ea1nh m\u1ebd, \u00e1p \u0111\u1ea3o, l\u00e0m trung h\u00f2a ho\u00e0n to\u00e0n the <strong>\u0111i\u1ec3m mi\u1ec1n t\u1eeb t\u00ednh c\u00f3 t\u1eeb h\u00f3a cao<\/strong> tr\u00ean \u0111\u0129a. Qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng ch\u1ec9 x\u00f3a c\u00e1c t\u1ec7p; n\u00f3 ho\u00e0n to\u00e0n ph\u00e1 h\u1ee7y c\u00e1c \u0111\u01b0\u1eddng servo \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp b\u1edfi nh\u00e0 s\u1ea3n xu\u1ea5t c\u1ee7a \u1ed5 \u0111\u0129a, khi\u1ebfn \u1ed5 c\u1ee9ng tr\u1edf n\u00ean v\u00f4 d\u1ee5ng v\u0129nh vi\u1ec5n.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c doanh nghi\u1ec7p t\u00ecm hi\u1ec3u ho\u1eb7c t\u00ecm ngu\u1ed3n v\u1eadt li\u1ec7u t\u1eeb t\u00ednh hi\u1ec7u su\u1ea5t cao kh\u00e1ng l\u1ea1i ho\u1eb7c t\u1eadn d\u1ee5ng c\u00e1c l\u1ef1c ngo\u1ea1i l\u1ec7 n\u00e0y, vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c <a href=\"https:\/\/nbaem.com\/vi\/products\/neodymium-magnet\/\">nam ch\u00e2m neodymium<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho dung sai c\u00f4ng nghi\u1ec7p ch\u00ednh x\u00e1c l\u00e0 r\u1ea5t thi\u1ebft y\u1ebfu.<\/p>\n<h3>C\u00e1c \u1ed4 \u0111\u0129a th\u1ec3 r\u1eafn (SSDs) v\u00e0 S\u1ef1 mi\u1ec5n nhi\u1ec5m t\u1eeb c\u1ee7a t\u1eeb t\u00ednh<\/h3>\n<p>N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng c\u00e1c \u1ed4 \u0111\u0129a th\u1ec3 r\u1eafn hi\u1ec7n \u0111\u1ea1i (SSDs), cu\u1ed9c tr\u00f2 chuy\u1ec7n s\u1ebd ho\u00e0n to\u00e0n thay \u0111\u1ed5i. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y n\u00eau b\u1eadt s\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n \u1edf <strong>Mi\u1ec5n nhi\u1ec5m t\u1eeb gi\u1eefa HDD v\u00e0 SSD<\/strong>:<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">Lo\u1ea1i \u1ed5 \u0111\u0129a<\/th>\n<th style=\"text-align: left;\">C\u00f4ng ngh\u1ec7 l\u01b0u tr\u1eef<\/th>\n<th style=\"text-align: left;\">D\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nam ch\u00e2m<\/th>\n<th style=\"text-align: left;\">Ng\u01b0\u1ee1ng h\u1ecfng h\u00f3c<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>C\u01a1 h\u1ecdc HDD<\/strong><\/td>\n<td style=\"text-align: left;\">\u0110\u0129a t\u1eeb<\/td>\n<td style=\"text-align: left;\">D\u1ec5 b\u1ecb h\u1ecfng v\u1eadt l\u00fd v\u00e0 d\u1eef li\u1ec7u<\/td>\n<td style=\"text-align: left;\">Y\u00eau c\u1ea7u m\u00e1y kh\u1eed t\u1eeb c\u00f4ng nghi\u1ec7p c\u00f4ng su\u1ea5t cao (&gt;10.000 Gauss)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u1ed4 c\u1ee9ng th\u1ec3 r\u1eafn (SSD)<\/strong><\/td>\n<td style=\"text-align: left;\">B\u1ed9 nh\u1edb flash (Chips)<\/td>\n<td style=\"text-align: left;\"><strong>100% Kh\u00e1ng t\u1eeb tr\u01b0\u1eddng<\/strong><\/td>\n<td style=\"text-align: left;\">Kh\u00f4ng th\u1ec3 b\u1ecb x\u00f3a b\u1edfi c\u00e1c tr\u01b0\u1eddng t\u1eeb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>V\u00ec SSD d\u1ef1a v\u00e0o c\u00e1c \u0111i\u1ec7n t\u00edch \u0111i\u1ec7n t\u00edch tr\u1eef trong c\u00e1c m\u1ea1ch t\u00edch h\u1ee3p ch\u1ee9 kh\u00f4ng ph\u1ea3i s\u1ef1 c\u0103n ch\u1ec9nh t\u1eeb t\u00ednh, t\u1eeb tr\u01b0\u1eddng b\u00ean ngo\u00e0i c\u00f3 t\u00e1c \u0111\u1ed9ng b\u1eb1ng kh\u00f4ng \u0111\u1ebfn t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u c\u1ee7a ch\u00fang. Vi\u1ec7c vung th\u1eb3ng l\u00ean SSD b\u1ea5t k\u1ef3 nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm m\u1ea1nh nh\u1ea5t c\u0169ng s\u1ebd kh\u00f4ng l\u00e0m g\u00ec \u0111\u01b0\u1ee3c c\u00e1c t\u1ec7p \u0111\u01b0\u1ee3c l\u01b0u b\u00ean trong.<\/p>\n<h2>Ngu\u1ed3n NdFeB c\u00f4ng nghi\u1ec7p ch\u1ea5t l\u01b0\u1ee3ng: Ti\u00eau chu\u1ea9n NBAEM<\/h2>\n<p>H\u1ec7 th\u1ed1ng d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ef1c cao, \u0111\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao k\u1ef9 thu\u1eadt <strong>nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/strong> \u0111\u00f2i h\u1ecfi c\u00e1c chu\u1ea9n c\u00f4ng nghi\u1ec7p nghi\u00eam ng\u1eb7t. T\u1ea1i NBAEM, ch\u00fang t\u00f4i s\u1ea3n xu\u1ea5t nam ch\u00e2m Neodymium (NdFeB) d\u1ea1ng sintered v\u00e0 bonded ch\u1ea5t l\u01b0\u1ee3ng cao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u0111\u1ed9 dung sai ch\u1eb7t ch\u1ebd c\u1ee7a m\u00f4i tr\u01b0\u1eddng l\u01b0u tr\u1eef m\u1eadt \u0111\u1ed9 cao. L\u00e0 m\u1ed9t nh\u00e0 cung c\u1ea5p c\u00f4ng nghi\u1ec7p h\u00e0ng \u0111\u1ea7u, ch\u00fang t\u00f4i chuy\u00ean v\u1ec1 k\u1ef9 thu\u1eadt h\u00ecnh h\u1ecdc t\u00f9y ch\u1ec9nh, cung c\u1ea5p c\u00e1c h\u00ecnh d\u1ea1ng ch\u00ednh x\u00e1c, h\u01b0\u1edbng t\u1eeb t\u00ednh v\u00e0 l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 c\u1ea7n thi\u1ebft cho \u0111\u1ed9ng c\u01a1 cu\u1ed9n \u00e2m thanh v\u00e0 c\u00e1c c\u01a1 c\u1ea5u truy\u1ec1n \u0111\u1ed9ng hi\u1ec7u su\u1ea5t cao.<\/p>\n<h3>\u0110\u00e1p \u1ee9ng Y\u00eau c\u1ea7u \u0110\u1ed9 M\u1eadt \u0110\u1ed9 Cao<\/h3>\n<p>\u0110\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 c\u1ed1 d\u1eef li\u1ec7u v\u00e0 duy tr\u00ec s\u1ef1 c\u0103n ch\u1ec9nh c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng track, c\u00e1c th\u00e0nh ph\u1ea7n \u1ed5 c\u1ee9ng \u0111\u00f2i h\u1ecfi tr\u01b0\u1eddng t\u1eeb \u1ed5n \u0111\u1ecbnh \u0111\u1eb7c bi\u1ec7t. Quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ea3m b\u1ea3o both \u0111\u1ed9 xuy\u00ean t\u1eeb cao v\u00e0 ph\u00e2n h\u1ee7y nhi\u1ec7t t\u1ed1i thi\u1ec3u, gi\u1eef cho hi\u1ec7u su\u1ea5t \u0111\u00e1ng tin c\u1eady d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c. Ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p chuy\u00ean bi\u1ec7t cho c\u00e1c \u0111\u1ecbnh d\u1ea1ng t\u1eeb t\u00ednh kh\u00e1c nhau, m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 trong <a href=\"https:\/\/nbaem.com\/vi\/bonded-magnet-data-sheet\/\">b\u1ea3ng thuy\u1ebft d\u1eef li\u1ec7u nam ch\u00e2m bonded<\/a> \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi ti\u00eau ch\u00ed hi\u1ec7u su\u1ea5t ch\u00ednh x\u00e1c c\u1ee7a b\u1ea1n.<\/p>\n<h3>L\u1ee3i th\u1ebf NBAEM<\/h3>\n<p>Ch\u00fang t\u00f4i x\u1eed l\u00fd to\u00e0n b\u1ed9 chu tr\u00ecnh s\u1ea3n xu\u1ea5t\u2014from x\u1eed l\u00fd v\u1eadt li\u1ec7u \u0111\u1ea5t hi\u1ebfm th\u00f4 \u0111\u1ebfn gia c\u00f4ng ho\u00e0n thi\u1ec7n v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c cao. Ph\u01b0\u01a1ng ph\u00e1p t\u00f9y ch\u1ec9nh c\u1ee7a ch\u00fang t\u00f4i \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng nghi\u00eam ng\u1eb7t c\u1ea7n thi\u1ebft cho c\u00e1c th\u00e0nh ph\u1ea7n quan tr\u1ecdng trong quy m\u00f4 h\u00e0ng lo\u1ea1t <a href=\"https:\/\/nbaem.com\/vi\/magnets-used-in-consumer-electronics\/\">nam ch\u00e2m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng<\/a>.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: left;\">\u0110\u1eb7c \u0111i\u1ec3m<\/th>\n<th style=\"text-align: left;\">Ti\u00eau chu\u1ea9n C\u00f4ng nghi\u1ec7p NBAEM<\/th>\n<th style=\"text-align: left;\">T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn Hi\u1ec7u su\u1ea5t \u1ed4 c\u1ee9ng<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: left;\"><strong>C\u1ea5p ch\u1ea5t li\u1ec7u<\/strong><\/td>\n<td style=\"text-align: left;\">NdFeB c\u00f3 \u0111\u1ed9 xuy\u00ean t\u1eeb cao (\u0111\u1ebfn N55, d\u00f2ng AH)<\/td>\n<td style=\"text-align: left;\">L\u1ef1c t\u1eeb t\u1ed1i \u0111a trong kh\u00f4ng gian chi\u1ebfm d\u1ee5ng t\u1ed1i thi\u1ec3u.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u0110\u1ed9 Ch\u00ednh x\u00e1c H\u00ecnh H\u1ecdc<\/strong><\/td>\n<td style=\"text-align: left;\">CH\u00ednh x\u00e1c \u0111\u1ebfn \u00b10,01 mm<\/td>\n<td style=\"text-align: left;\">\u0110\u1ea3m b\u1ea3o v\u1eeba v\u1eb7n ho\u00e0n h\u1ea3o trong t\u1ed5 h\u1ee3p VCM nh\u1ecf g\u1ecdn.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u0110\u1ed9 B\u1ec1n L\u1edbp Ph\u1ee7<\/strong><\/td>\n<td style=\"text-align: left;\">Ni-Cu-Ni nhi\u1ec1u l\u1edbp ho\u1eb7c Epoxy ti\u00ean ti\u1ebfn<\/td>\n<td style=\"text-align: left;\">Ng\u0103n ng\u1eeba oxi h\u00f3a v\u00e0 n\u1ee9t gi\u00f2n b\u00ean trong \u1ed5 \u0111\u0129a.<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left;\"><strong>\u1ed4n \u0111\u1ecbnh nhi\u1ec7t<\/strong><\/td>\n<td style=\"text-align: left;\">C\u00e1c t\u00f9y ch\u1ecdn rated l\u00ean t\u1edbi 220\u00b0C<\/td>\n<td style=\"text-align: left;\">Duy tr\u00ec \u0111\u1ed3ng nh\u1ea5t l\u01b0u l\u01b0\u1ee3ng t\u1eeb tr\u01b0\u1eddng trong t\u1ea3i tr\u1ecdng l\u00e0m vi\u1ec7c c\u1ee7a \u1ed5 \u0111\u0129a<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>An to\u00e0n khi l\u1ea5y ra nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 c\u1ee9ng d\u1eef li\u1ec7u<\/h2>\n<p>L\u1ea5y ra <strong>nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/strong> l\u00e0 m\u1ed9t nhi\u1ec7m v\u1ee5 t\u00e1i ch\u1ebf c\u1ef1c k\u1ef3 rewarded, nh\u01b0ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c. Nh\u1eefng nam ch\u00e2m neodymium \u0111\u1ea5t hi\u1ebfm (NdFeB) n\u00e0y c\u1ef1c k\u1ef3 m\u1ea1nh m\u1ebd v\u00e0 \u0111\u00f2i h\u1ecfi s\u1ef1 x\u1eed l\u00fd c\u1ea9n th\u1eadn trong qu\u00e1 tr\u00ecnh th\u00e1o b\u1ecf.<\/p>\n<h3>Th\u00e1o l\u1eafp c\u01a1 h\u1ecdc theo t\u1eebng b\u01b0\u1edbc<\/h3>\n<p>\u0110\u1ec3 thu ho\u1ea1ch an to\u00e0n nh\u1eefng nam ch\u00e2m n\u00e0y t\u1eeb m\u1ed9t HDD b\u1ecf \u0111i, h\u00e3y l\u00e0m theo quy tr\u00ecnh c\u00f3 c\u1ea5u tr\u00fac sau:<\/p>\n<ol>\n<li><strong>Lo\u1ea1i b\u1ecf v\u1ecf ngo\u00e0i:<\/strong> S\u1eed d\u1ee5ng d\u1ee5ng c\u1ee5 v\u1eb7n Torx (th\u01b0\u1eddng l\u00e0 T6 ho\u1eb7c T8) \u0111\u1ec3 th\u00e1o to\u00e0n b\u1ed9 \u1ed1c v\u00edt hi\u1ec7n di\u1ec7n tr\u00ean t\u1ea5m kim lo\u1ea1i \u1edf tr\u00ean c\u00f9ng. \u0110\u1eebng qu\u00ean \u1ed1c v\u00edt \u1ea9n th\u01b0\u1eddng b\u1ecb ch\u00f4n d\u01b0\u1edbi mi\u1ebfng d\u00e1n b\u1ea3o h\u00e0nh b\u1eb1ng m\u00e0u b\u1ea1c.<\/li>\n<li><strong>M\u1edf r\u1ed9ng Kh\u1ed1i T\u00e1c \u0111\u1ed9ng:<\/strong> X\u00e1c \u0111\u1ecbnh ph\u1ea7n Motor Cu\u1ed9n Gi\u1ecdng n\u00f3i (VCM) \u1edf g\u00f3c sau c\u1ee7a \u1ed5 c\u1ee9ng. C\u00e1c nam ch\u00e2m \u0111\u01b0\u1ee3c \u0111\u1eb7t b\u00ean trong c\u00e1c gi\u00e1 \u0111\u1ee1 b\u1eb1ng th\u00e9p \u1edf tr\u00ean v\u00e0 d\u01b0\u1edbi nh\u1eb1m t\u1eadp trung tr\u01b0\u1eddng t\u1eeb.<\/li>\n<li><strong>T\u00e1ch C\u00e1c Gi\u00e1 \u0110\u1ee1 Nam Ch\u00e2m:<\/strong> Lo\u1ea1i b\u1ecf c\u00e1c \u1ed1c v\u00edt gi\u1eef gi\u00e1 \u0111\u1ee1 tr\u00ean \u1edf v\u1ecb tr\u00ed c\u1ed1 \u0111\u1ecbnh. D\u00f9ng tua v\u00edt \u0111\u1ea7u ph\u1eb3ng \u0111\u1ec3 nh\u1eb9 nh\u00e0ng t\u00e1ch gi\u00e1 \u0111\u1ee1 \u1edf tr\u00ean ra.<\/li>\n<li><strong>Ng\u1eaft Nam Ch\u00e2m kh\u1ecfi T\u1ea5m N\u1ec1n:<\/strong> C\u00e1c nam ch\u00e2m \u0111\u01b0\u1ee3c d\u00e1n ch\u1eafc v\u00e0o c\u00e1c t\u1ea5m th\u00e9p c\u1ee7a ch\u00fang. Tr\u01b0\u1ee3t m\u1ed9t l\u01b0\u1ee1i dao m\u1ecfng gi\u1eefa nam ch\u00e2m v\u00e0 t\u1ea5m, ho\u1eb7c d\u00f9ng hai c\u1eb7p k\u00ecm \u0111\u1ec3 u\u1ed1n cong khung \u0111\u1ee1 m\u1ed9t ch\u00fat cho \u0111\u1ebfn khi li\u00ean k\u1ebft b\u1ecb \u0111\u1ee9t.<\/li>\n<\/ol>\n<h3>C\u1ea3nh B\u00e1o An To\u00e0n C\u00f4ng Nghi\u1ec7p<\/h3>\n<blockquote><p><strong>C\u1ea3nh b\u00e1o:<\/strong> Nam ch\u00e2m neodymium r\u1ea5t gi\u00f2n v\u00e0 sinh ra l\u1ef1c k\u1eb9p c\u1ef1c m\u1ea1nh.<\/p><\/blockquote>\n<ul>\n<li><strong>Nguy c\u01a1 K\u1eb9t Tay:<\/strong> C\u00e1c nam ch\u00e2m HDD l\u1edbn h\u01a1n c\u00f3 th\u1ec3 va v\u00e0o nhau v\u1edbi l\u1ef1c \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 l\u00e0m ph\u1ed3ng m\u00e1 ho\u1eb7c l\u00e0m r\u00e1ch da. Lu\u00f4n gi\u1eef c\u00e1c nam ch\u00e2m \u0111\u00e3 t\u00e1ch ra c\u00e1ch nhau v\u00e0i inch.<\/li>\n<li><strong>B\u1ea3o v\u1ec7 m\u1eaft:<\/strong> V\u00ec c\u00e1c v\u1eadt li\u1ec7u sintered n\u00e0y r\u1ea5t gi\u00f2n, vi\u1ec7c gh\u00e9p ch\u00fang l\u1ea1i c\u00f3 th\u1ec3 l\u00e0m ch\u00fang b\u1ecb n\u1ee9t, ph\u00f3ng ra c\u00e1c m\u1ea3nh kim lo\u1ea1i nh\u1ecf s\u1eafc nh\u1ecdn. Lu\u00f4n \u0111eo k\u00ednh b\u1ea3o h\u1ed9.<\/li>\n<li><strong>S\u1ef1 Ph\u00e1 V\u1ee1 Nhi\u1ec7t<\/strong> Kh\u00f4ng bao gi\u1edd d\u00f9ng b\u1ecdc kh\u00f2 \u0111\u1ec3 l\u00e0m l\u1ecfng keo d\u00e1n. Nam ch\u00e2m neodymium ti\u00eau chu\u1ea9n s\u1ebd m\u1ea5t t\u00ednh t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n khi b\u1ecb nung qu\u00e1 m\u1ee9c <a href=\"https:\/\/nbaem.com\/vi\/how-long-do-magnets-last\/\">gi\u1edbi h\u1ea1n nhi\u1ec7t l\u00e0m m\u1ea5t t\u1eeb t\u00ednh<\/a>.<\/li>\n<\/ul>\n<h3>\u00dd t\u01b0\u1edfng T\u00e1i s\u1eed d\u1ee5ng S\u00e1ng t\u1ea1o<\/h3>\n<p>M\u1ed9t khi \u0111\u01b0\u1ee3c khai th\u00e1c, nh\u1eefng nam ch\u00e2m si\u00eau m\u1ea1nh n\u00e0y c\u1ef1c k\u1ef3 h\u1eefu \u00edch cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea1i x\u01b0\u1edfng v\u00e0 c\u00f4ng nghi\u1ec7p \u1edf c\u00e1c giai \u0111o\u1ea1n sau:<\/p>\n<ul>\n<li><strong>Gi\u00e1 \u0111\u1ec3 d\u1ee5ng c\u1ee5 c\u00f3 t\u1eeb t\u00ednh:<\/strong> R\u00f3ng \u0111\u1ebf t\u1ea5m backing b\u1eb1ng th\u00e9p tr\u1ef1c ti\u1ebfp l\u00ean t\u01b0\u1eddng x\u01b0\u1edfng \u0111\u1ec3 gi\u1eef c\u00e1c d\u1ee5ng c\u1ee5 v\u1eb7n, tua v\u00edt v\u00e0 m\u0169i khoan n\u1eb7ng.<\/li>\n<li><strong>Kh\u00f3a nam ch\u00e2m DIY:<\/strong> S\u1eed d\u1ee5ng ch\u00fang \u0111\u1ec3 t\u1ea1o c\u00e1c \u0111\u00f3ng k\u00edn ch\u1eafc ch\u1eafn cho c\u1eeda t\u1ee7, c\u1ed5ng ho\u1eb7c c\u00e1c b\u1ea3ng \u1ea9n trong x\u01b0\u1edfng.<\/li>\n<li><strong>M\u00e1y d\u00f2 kim lo\u1ea1i (Stud Finder):<\/strong> Tr\u01b0\u1ee3t m\u1ed9t nam ch\u00e2m d\u1ecdc theo th\u1ea1ch cao; n\u00f3 s\u1ebd d\u1ec5 d\u00e0ng b\u00e1m v\u00e0o c\u00e1c v\u00edt kim lo\u1ea1i n\u1eb1m d\u01b0\u1edbi l\u1edbp s\u01a1n, x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c c\u00e1c thanh g\u1ed7 \u1edf ph\u00eda sau.<\/li>\n<li><strong>V\u1ec7 sinh s\u1eaft t\u1eeb:<\/strong> G\u1eafn m\u1ed9t chi\u1ebfc \u1edf d\u01b0\u1edbi \u0111\u1ea7u ch\u1ed5i x\u01b0\u1edfng \u0111\u1ec3 thu th\u1eadp nhanh c\u00e1c c\u00e1i \u0111inh r\u01a1i, bu l\u00f4ng v\u00e0 m\u1ea1t kim lo\u1ea1i kh\u1ecfi s\u00e0n.<\/li>\n<\/ul>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 c\u1ee9ng d\u1eef li\u1ec7u<\/h2>\n<h3>Nam ch\u00e2m trong \u1ed5 c\u1ee9ng c\u00f3 m\u1ea1nh \u0111\u1ebfn m\u1ee9c n\u00e0o?<\/h3>\n<p>c\u1ea3 <strong>nam ch\u00e2m m\u1ea1nh b\u00ean trong \u1ed5 l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/strong> \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb neodymium c\u1ea5p cao (NdFeB). Nh\u1eefng nam ch\u00e2m v\u0129nh vi\u1ec5n sintered n\u00e0y c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng m\u1eb7t l\u00ean t\u1edbi <strong>4.000 \u0111\u1ebfn 5.000 Gauss<\/strong>. Tr\u00ean th\u1ef1c t\u1ebf, ch\u00fang c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng n\u00e2ng c\u00e1c v\u1eadt c\u00f3 tr\u1ecdng l\u01b0\u1ee3ng g\u1ea5p h\u01a1n 1.300 l\u1ea7n so v\u1edbi ch\u00ednh ch\u00fang. M\u1ee9c t\u1eeb tr\u01b0\u1eddng t\u1eeb t\u00ednh c\u1ef1c m\u1ea1nh n\u00e0y l\u00e0 c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u1eed l\u00fd v\u1ecb tr\u00ed c\u00e1nh tay actuator nhanh trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i.<\/p>\n<h3>M\u1ed9t magnet c\u00f3 l\u00e0m h\u1ecfng SSD kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng. Khi so s\u00e1nh kh\u1ea3 n\u0103ng mi\u1ec5n nhi\u1ec5m t\u1eeb c\u1ee7a HDD v\u00e0 SSD, \u1ed5 \u0111\u0129a th\u1ec3 r\u1eafn ho\u00e0n to\u00e0n mi\u1ec5n nhi\u1ec5m v\u1edbi tr\u01b0\u1eddng t\u1eeb t\u0129nh. SSD kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u0129a l\u01b0u tr\u1eef t\u1eeb t\u00ednh; thay v\u00e0o \u0111\u00f3, ch\u00fang d\u1ef1a v\u00e0o chip b\u1ed9 nh\u1edb flash \u0111\u1ec3 gi\u1eef d\u1eef li\u1ec7u. Trong khi m\u1ed9t m\u00e1y kh\u1eed t\u1eeb c\u00f4ng nghi\u1ec7p kh\u1ed5ng l\u1ed3 c\u00f3 th\u1ec3 ph\u00e1 h\u1ee7y m\u1ed9t HDD, n\u00f3 s\u1ebd kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn SSD. Tuy nhi\u00ean, nam ch\u00e2m m\u1ea1nh v\u1eabn c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng ph\u1ea7n m\u1ea1ch n\u1ed9i b\u1ed9 nh\u1ea1y c\u1ea3m n\u1ebfu ch\u00fang g\u00e2y cong v\u00eanh th\u00e0nh ph\u1ea7n.<\/p>\n<h3>T\u00f4i c\u00f3 th\u1ec3 t\u00e1i s\u1eed d\u1ee5ng nam ch\u00e2m c\u1ee9ng c\u0169 m\u1ed9t c\u00e1ch an to\u00e0n kh\u00f4ng?<\/h3>\n<p>V\u00e2ng, t\u00e1i ch\u1ebf th\u00e1o r\u1eddi \u1ed5 c\u1ee9ng l\u00e0 m\u1ed9t c\u00e1ch tuy\u1ec7t v\u1eddi \u0111\u1ec3 khai th\u00e1c nh\u1eefng v\u1eadt li\u1ec7u t\u1eeb t\u00ednh \u0111\u1ea5t hi\u1ebfm cao c\u1ea5p n\u00e0y cho c\u00e1c d\u1ef1 \u00e1n DIY, t\u1ed5 ch\u1ee9c workshop ho\u1eb7c gi\u00e1 \u0111\u1ee1 d\u1ee5ng c\u1ee5. V\u00ec c\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y c\u00f3 nhi\u1ec1u h\u00ecnh d\u1ea1ng \u0111\u1ed9c \u0111\u00e1o, b\u1ea1n c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh ch\u00fang cho nhi\u1ec1u nhu c\u1ea7u l\u1eafp \u0111\u1eb7t. N\u1ebfu b\u1ea1n quan t\u00e2m \u0111\u1ebfn c\u00e1ch c\u00e1c h\u00ecnh h\u1ecdc kh\u00e1c nhau \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u1ef1c t\u1eeb, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c <a href=\"https:\/\/nbaem.com\/vi\/different-shape-of-magnet\/\">h\u00ecnh d\u1ea1ng nam ch\u00e2m kh\u00e1c nhau<\/a> t\u00f9y ch\u1ecdn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong thi\u1ebft k\u1ebf c\u00f4ng nghi\u1ec7p.<\/p>\n<blockquote><p><strong>C\u1ea3nh b\u00e1o an to\u00e0n:<\/strong> Lu\u00f4n \u0111eo g\u0103ng d\u00e0y khi x\u1eed l\u00fd nh\u1eefng m\u1ea3nh \u0111\u00e3 salvaged n\u00e0y. Ch\u00fang c\u00f3 th\u1ec3 gh\u00e9p l\u1ea1i v\u1edbi l\u1ef1c \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 k\u1eb9p da ho\u1eb7c l\u00e0m v\u1ee1 l\u1edbp ph\u1ee7 Ni-Cu-Ni (niken).<\/p><\/blockquote>","protected":false},"excerpt":{"rendered":"<p>Engineering guide to powerful neodymium magnets inside HDDs covering VCM design Gauss strength safety recycling and HDD vs SSD magnet effects<\/p>","protected":false},"author":1,"featured_media":3888,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-3889","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2026\/06\/Hard_Drive_Magnetic_Storage_Magnets_l730K6fmc.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3889","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=3889"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3889\/revisions"}],"predecessor-version":[{"id":3901,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3889\/revisions\/3901"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/3888"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=3889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=3889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=3889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}