{"id":2016,"date":"2025-08-26T05:08:42","date_gmt":"2025-08-26T05:08:42","guid":{"rendered":"https:\/\/nbaem.com\/?p=2016"},"modified":"2025-08-26T05:23:13","modified_gmt":"2025-08-26T05:23:13","slug":"is-zinc-metal-magnetic","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/is-zinc-metal-magnetic\/","title":{"rendered":"Kim lo\u1ea1i k\u1ebdm c\u00f3 t\u1eeb t\u00ednh - Nh\u1eefng \u0111i\u1ec1u v\u1ec1 \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a n\u00f3"},"content":{"rendered":"<p>Is <strong>kim lo\u1ea1i k\u1ebdm t\u1eeb<\/strong>? B\u1ea1n c\u00f3 th\u1ec3 ngh\u0129 r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c kim lo\u1ea1i \u0111\u1ec1u b\u1ecb h\u00fat b\u1edfi nam ch\u00e2m, nh\u01b0ng s\u1ef1 th\u1eadt c\u00f2n th\u00fa v\u1ecb h\u01a1n nhi\u1ec1u. <strong>K\u1ebdm<\/strong> ho\u1ea1t \u0111\u1ed9ng theo c\u00e1c quy t\u1eafc kh\u00e1c nhau\u2014kh\u00f4ng gi\u1ed1ng nh\u01b0 <strong>s\u1eaft<\/strong> or <strong>niken<\/strong>, v\u00e0 h\u00e0nh vi c\u1ee7a n\u00f3 trong t\u1eeb tr\u01b0\u1eddng c\u00f3 th\u1ec3 l\u00e0m b\u1ea1n ng\u1ea1c nhi\u00ean. D\u00f9 b\u1ea1n \u0111ang trong <strong>s\u1ea3n xu\u1ea5t<\/strong>, <strong>k\u1ef9 thu\u1eadt<\/strong>, ho\u1eb7c ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 t\u00f2 m\u00f2 v\u1ec1 <strong>v\u1eadt li\u1ec7u t\u1eeb t\u00ednh<\/strong>, hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u1ed9c \u0111\u00e1o c\u1ee7a k\u1ebdm c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n tr\u00e1nh nh\u1eefng sai l\u1ea7m t\u1ed1n k\u00e9m v\u00e0 m\u1edf ra nh\u1eefng c\u01a1 h\u1ed9i m\u1edbi cho thi\u1ebft k\u1ebf. H\u00e3y b\u1ecf qua nh\u1eefng suy \u0111o\u00e1n v\u00e0 xem ch\u00ednh x\u00e1c n\u01a1i <strong>t\u1eeb t\u00ednh c\u1ee7a k\u1ebdm<\/strong> \u0111\u1ee9ng v\u1eefng\u2014v\u00e0 t\u1ea1i sao \u0111i\u1ec1u \u0111\u00f3 l\u1ea1i quan tr\u1ecdng.<\/p>\n<h2>Nh\u1eefng nguy\u00ean l\u00fd c\u01a1 b\u1ea3n c\u1ee7a t\u1eeb tr\u01b0\u1eddng<\/h2>\n<p>T\u1eeb tr\u01b0\u1eddng l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00fd n\u01a1i m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u t\u1ea1o ra l\u1ef1c c\u00f3 th\u1ec3 h\u00fat ho\u1eb7c \u0111\u1ea9y c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c do chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a c\u00e1c \u0111i\u1ec7n t\u00edch, ch\u1ee7 y\u1ebfu l\u00e0 electron. V\u1ec1 c\u01a1 b\u1ea3n, t\u1eeb tr\u01b0\u1eddng xu\u1ea5t ph\u00e1t t\u1eeb s\u1ef1 s\u1eafp x\u1ebfp v\u00e0 quay c\u1ee7a electron trong m\u1ed9t nguy\u00ean t\u1eed. T\u00f9y thu\u1ed9c v\u00e0o c\u00e1ch c\u00e1c electron n\u00e0y ho\u1ea1t \u0111\u1ed9ng, c\u00e1c v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 th\u1ec3 hi\u1ec7n c\u00e1c lo\u1ea1i h\u00e0nh vi t\u1eeb kh\u00e1c nhau.<\/p>\n<p><strong>C\u00e1c lo\u1ea1i h\u00e0nh vi t\u1eeb ch\u00ednh bao g\u1ed3m:<\/strong><\/p>\n<ul>\n<li><strong>H\u1ea5p d\u1eabn ferromagnet<\/strong> \u2013 S\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng m\u1ea1nh \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c kim lo\u1ea1i nh\u01b0 s\u1eaft, cobalt v\u00e0 niken, n\u01a1i c\u00e1c spins electron x\u1ebfp h\u00e0ng theo c\u00f9ng m\u1ed9t h\u01b0\u1edbng.<\/li>\n<li><strong>H\u1ea5p d\u1eabn paramagnet<\/strong> \u2013 S\u1ee9c h\u00fat y\u1ebfu v\u1edbi t\u1eeb tr\u01b0\u1eddng do electron kh\u00f4ng gh\u00e9p c\u1eb7p g\u00e2y ra, th\u1ea5y trong c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 nh\u00f4m.<\/li>\n<li><strong>Diamagnet<\/strong> \u2013 S\u1ef1 \u0111\u1ea9y y\u1ebfu kh\u1ecfi t\u1eeb tr\u01b0\u1eddng do electron gh\u00e9p c\u1eb7p, l\u00e0m trung h\u00f2a c\u00e1c moment t\u1eeb, nh\u01b0 trong \u0111\u1ed3ng ho\u1eb7c k\u1ebdm.<\/li>\n<li><strong>Ch\u1ed1ng t\u1eeb<\/strong> \u2013 M\u1ed9t \u0111\u1eb7c t\u00ednh trong \u0111\u00f3 c\u00e1c moment t\u1eeb x\u1ebfp theo h\u01b0\u1edbng ng\u01b0\u1ee3c nhau, trung h\u00f2a l\u1eabn nhau, d\u1eabn \u0111\u1ebfn kh\u00f4ng c\u00f3 t\u1eeb tr\u01b0\u1eddng t\u1ed5ng h\u1ee3p.<\/li>\n<\/ul>\n<p>H\u1ea7u h\u1ebft c\u00e1c kim lo\u1ea1i \u0111\u1ec1u th\u1ec3 hi\u1ec7n m\u1ed9t d\u1ea1ng ph\u1ea3n \u1ee9ng t\u1eeb, nh\u01b0ng c\u01b0\u1eddng \u0111\u1ed9 v\u00e0 lo\u1ea1i ph\u1ea3n \u1ee9ng r\u1ea5t kh\u00e1c nhau. <strong>Kim lo\u1ea1i ferromagnetic<\/strong> c\u00f3 th\u1ec3 gi\u1eef t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n, trong khi <strong>kim lo\u1ea1i diamagnetic v\u00e0 paramagnetic<\/strong> ch\u1ec9 th\u1ec3 hi\u1ec7n hi\u1ec7u \u1ee9ng khi ti\u1ebfp x\u00fac v\u1edbi t\u1eeb tr\u01b0\u1eddng b\u00ean ngo\u00e0i.<\/p>\n<p>Trong khoa h\u1ecdc v\u1eadt li\u1ec7u v\u00e0 k\u1ef9 thu\u1eadt, vi\u1ec7c hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a kim lo\u1ea1i l\u00e0 r\u1ea5t quan tr\u1ecdng. Nh\u1eefng \u0111\u1eb7c t\u00ednh n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn:<\/p>\n<ul>\n<li>L\u1ef1a ch\u1ecdn kim lo\u1ea1i cho <strong>thi\u1ebft b\u1ecb \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n t\u1eed<\/strong><\/li>\n<li>T\u01b0\u01a1ng th\u00edch v\u1edbi <strong>c\u1ea3m bi\u1ebfn t\u1eeb ho\u1eb7c h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/strong><\/li>\n<li>Ph\u00e2n lo\u1ea1i v\u00e0 <strong>quy tr\u00ecnh t\u00e1i ch\u1ebf kim lo\u1ea1i<\/strong> s\u1eed d\u1ee5ng nam ch\u00e2m<\/li>\n<li>Thi\u1ebft k\u1ebf <strong>b\u1ea3o v\u1ec7 t\u1eeb tr\u01b0\u1eddng<\/strong> ho\u1eb7c c\u00e1c th\u00e0nh ph\u1ea7n phi t\u1eeb t\u00ednh<\/li>\n<\/ul>\n<p>\u0110\u1ec3 xem x\u00e9t k\u1ef9 h\u01a1n v\u1ec1 nh\u1eefng h\u00e0nh vi n\u00e0y, h\u00e3y xem ph\u1ea7n gi\u1ea3i th\u00edch chi ti\u1ebft trong <span style=\"color: #ff6600;\"><strong><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/type-of-magnetic-materials\/\" target=\"_blank\" rel=\"noopener\">C\u00e1c Lo\u1ea1i V\u1eadt Li\u1ec7u T\u1eeb<\/a><\/strong>,<\/span> n\u00f3i r\u00f5 c\u00e1ch c\u00e1c kim lo\u1ea1i ph\u1ea3n \u1ee9ng v\u1edbi t\u1eeb tr\u01b0\u1eddng trong c\u00e1c b\u1ed1i c\u1ea3nh c\u00f4ng nghi\u1ec7p v\u00e0 khoa h\u1ecdc.<\/p>\n<h2>C\u00e1c t\u00ednh ch\u1ea5t t\u1eeb c\u1ee7a k\u1ebdm<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Zinc_diamagnetism_properties_WJ1hsW5Wy.webp\" alt=\"Thu\u1ed9c t\u00ednh ch\u1ed1ng t\u1eeb c\u1ee7a k\u1ebdm\" \/><\/p>\n<p>K\u1ebdm l\u00e0 m\u1ed9t kim lo\u1ea1i m\u00e0u tr\u1eafng xanh lam, m\u1ea1nh m\u1ebd, ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong l\u1edbp ph\u1ee7 v\u00e0 h\u1ee3p kim. V\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc, n\u00f3 c\u00f3 c\u1ea5u tr\u00fac v\u1ecf electron \u0111\u00e3 \u0111\u1ea7y, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch n\u00f3 ph\u1ea3n \u1ee9ng v\u1edbi t\u1eeb tr\u01b0\u1eddng. <strong>K\u1ebdm kh\u00f4ng ph\u1ea3i l\u00e0 kim lo\u1ea1i ferromagnetic<\/strong>, c\u00f3 ngh\u0129a l\u00e0 n\u00f3 kh\u00f4ng d\u00ednh v\u00e0o nam ch\u00e2m nh\u01b0 s\u1eaft, niken ho\u1eb7c cobalt.<\/p>\n<p>Thay v\u00e0o \u0111\u00f3, k\u1ebdm \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i l\u00e0 m\u1ed9t <strong>kim lo\u1ea1i d\u1ecb t\u1eeb<\/strong>. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 n\u00f3 th\u1ef1c s\u1ef1 t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb y\u1ebfu \u1edbt ph\u1ea3n kh\u00e1ng khi b\u1ecb t\u00e1c \u0111\u1ed9ng b\u1edfi m\u1ed9t tr\u01b0\u1eddng t\u1eeb, mang l\u1ea1i kh\u1ea3 n\u0103ng c\u1ea3m \u1ee9ng t\u1eeb \u00e2m nh\u1eb9. B\u1ea1n kh\u00f4ng th\u1ec3 c\u1ea3m nh\u1eadn ho\u1eb7c nh\u00ecn th\u1ea5y hi\u1ec7u \u1ee9ng n\u00e0y m\u00e0 kh\u00f4ng c\u00f3 c\u00e1c thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m, nh\u01b0ng c\u00e1c nghi\u00ean c\u1ee9u v\u00e0 th\u1eed nghi\u1ec7m trong ph\u00f2ng th\u00ed nghi\u1ec7m x\u00e1c nh\u1eadn \u0111i\u1ec1u \u0111\u00f3. C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 \u0111o kh\u1ea3 n\u0103ng c\u1ea3m \u1ee9ng t\u1eeb c\u1ee7a k\u1ebdm kho\u1ea3ng <strong>-0.000014 (\u0111\u01a1n v\u1ecb SI)<\/strong>, th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi c\u00e1c v\u1eadt li\u1ec7u c\u00f3 l\u1ef1c h\u00fat t\u1eeb r\u00f5 r\u00e0ng.<\/p>\n<p>V\u00ec \u0111i\u1ec1u n\u00e0y, k\u1ebdm s\u1ebd kh\u00f4ng g\u00e2y nhi\u1ec5u cho c\u00e1c c\u1ea3m bi\u1ebfn t\u1eeb v\u00e0 kh\u00f4ng b\u1ecb thu h\u00fat b\u1edfi c\u00e1c b\u1ed9 ph\u00e2n t\u00e1ch t\u1eeb, m\u1ed9t th\u1ef1c t\u1ebf \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong s\u1ea3n xu\u1ea5t, t\u00e1i ch\u1ebf v\u00e0 \u1ee9ng d\u1ee5ng \u0111i\u1ec7n t\u1eed.<\/p>\n<h2>T\u1ea1i sao t\u1eeb t\u00ednh c\u1ee7a k\u1ebdm ho\u1eb7c s\u1ef1 thi\u1ebfu h\u1ee5t c\u1ee7a n\u00f3 l\u1ea1i quan tr\u1ecdng<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Zinc_non-magnetic_properties_applications_wNFWnMYS.webp\" alt=\"\u1ee8ng d\u1ee5ng c\u1ee7a t\u00ednh kh\u00f4ng t\u1eeb c\u1ee7a k\u1ebdm\" \/><\/p>\n<p>T\u00ednh phi t\u1eeb c\u1ee7a k\u1ebdm \u0111\u00f3ng vai tr\u00f2 l\u1edbn h\u01a1n trong ng\u00e0nh c\u00f4ng nghi\u1ec7p h\u01a1n nhi\u1ec1u ng\u01b0\u1eddi ngh\u0129. V\u00ec k\u1ebdm l\u00e0 kim lo\u1ea1i d\u1ecb t\u1eeb, n\u00f3 kh\u00f4ng d\u00ednh v\u00e0o nam ch\u00e2m, \u0111i\u1ec1u n\u00e0y l\u00e0m cho n\u00f3 l\u00fd t\u01b0\u1edfng cho m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng n\u01a1i nhi\u1ec5u t\u1eeb c\u00f3 th\u1ec3 g\u00e2y ra v\u1ea5n \u0111\u1ec1.<\/p>\n<p>In <strong>\u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p<\/strong>, \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a k\u1ebdm l\u00e0 m\u1ea1 k\u1ebdm\u2014ph\u1ee7 l\u1edbp ch\u1ed1ng r\u1ec9 cho th\u00e9p. Vi\u1ec7c kh\u00f4ng c\u00f3 t\u00ednh t\u1eeb gi\u00fap c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a th\u00e9p ph\u00eda d\u01b0\u1edbi kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng. Trong <strong>s\u1ea3n xu\u1ea5t h\u1ee3p kim<\/strong>, vi\u1ec7c th\u00eam k\u1ebdm c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n m\u00e0 kh\u00f4ng thay \u0111\u1ed5i c\u00e1ch ph\u1ea3n \u1ee9ng c\u1ee7a s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng v\u1edbi nam ch\u00e2m. Trong <strong>\u0111i\u1ec7n t\u1eed<\/strong>, k\u1ebdm \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao \u0111\u1ec3 l\u00e0m v\u1ecf ho\u1eb7c gi\u00e1 \u0111\u1ee1 phi t\u1eeb kh\u00f4ng g\u00e2y nhi\u1ec5u cho c\u1ea3m bi\u1ebfn, cu\u1ed9n d\u00e2y ho\u1eb7c l\u01b0u tr\u1eef d\u1eef li\u1ec7u t\u1eeb.<\/p>\n<p>Tr\u00ean <strong>b\u00ean c\u1ea1nh t\u00e1i ch\u1ebf<\/strong>, kim lo\u1ea1i kh\u00f4ng t\u1eeb t\u00ednh nh\u01b0 k\u1ebdm d\u1ec5 d\u00e0ng t\u00e1ch ra kh\u1ecfi c\u00e1c v\u1eadt li\u1ec7u s\u1eaft t\u1eeb b\u1eb1ng h\u1ec7 th\u1ed1ng ph\u00e2n lo\u1ea1i t\u1eeb. C\u00e1c b\u00e3i ph\u1ebf li\u1ec7u v\u00e0 nh\u00e0 m\u00e1y x\u1eed l\u00fd qu\u00e9t nam ch\u00e2m qua b\u0103ng chuy\u1ec1n \u0111\u1ec3 k\u00e9o th\u00e9p v\u00e0 s\u1eaft ra, \u0111\u1ec3 l\u1ea1i k\u1ebdm v\u00e0 c\u00e1c kim lo\u1ea1i kh\u00f4ng t\u1eeb t\u00ednh kh\u00e1c \u0111\u1ec3 thu gom ri\u00eang.<\/p>\n<p>T\u1eeb t\u00ednh c\u1ee7a k\u1ebdm c\u0169ng c\u00f3 th\u1ec3 h\u1eefu \u00edch trong <strong>b\u1ea3o v\u1ec7 t\u1eeb tr\u01b0\u1eddng<\/strong> ho\u1eb7c trong c\u00e1c b\u1ed9 ph\u1eadn c\u1ee7a m\u00e1y m\u00f3c v\u00e0 thi\u1ebft b\u1ecb c\u1ea7n gi\u1eef nguy\u00ean kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi c\u00e1c tr\u01b0\u1eddng t\u1eeb g\u1ea7n \u0111\u00f3. \u0110i\u1ec1u n\u00e0y khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho c\u00e1c d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c, l\u1eafp r\u00e1p h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 thi\u1ebft b\u1ecb s\u1ea3n xu\u1ea5t chuy\u00ean d\u1ee5ng.<\/p>\n<h2>So s\u00e1nh k\u1ebdm v\u1edbi c\u00e1c kim lo\u1ea1i ph\u1ed5 bi\u1ebfn kh\u00e1c<\/h2>\n<p>H\u00e0nh vi t\u1eeb c\u1ee7a k\u1ebdm r\u1ea5t kh\u00e1c so v\u1edbi c\u00e1c kim lo\u1ea1i nh\u01b0 <strong>s\u1eaft, niken v\u00e0 cobalt<\/strong>. Ba kim lo\u1ea1i \u0111\u00f3 l\u00e0 <strong>s\u1eaft t\u1eeb<\/strong>, c\u00f3 ngh\u0129a l\u00e0 ch\u00fang h\u00fat m\u1ea1nh c\u00e1c nam ch\u00e2m v\u00e0 c\u00f3 th\u1ec3 gi\u1eef t\u1eeb t\u00ednh. Trong khi \u0111\u00f3, k\u1ebdm l\u00e0 <strong>kh\u00f4ng t\u1eeb<\/strong>, ngh\u0129a l\u00e0 n\u00f3 y\u1ebfu \u1edbt \u0111\u1ea9y c\u00e1c tr\u01b0\u1eddng t\u1eeb v\u00e0 kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh l\u00e2u d\u00e0i.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t c\u00e1i nh\u00ecn nhanh:<\/p>\n<table>\n<thead>\n<tr>\n<th>Kim lo\u1ea1i<\/th>\n<th>Lo\u1ea1i t\u1eeb t\u00ednh<\/th>\n<th>\u0110\u1ed9 m\u1ea1nh t\u1eeb t\u00ednh<\/th>\n<th>C\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>S\u1eaft<\/td>\n<td>S\u1eaft t\u1eeb<\/td>\n<td>M\u1ea1nh m\u1ebd<\/td>\n<td>Th\u00e9p, d\u1ee5ng c\u1ee5, x\u00e2y d\u1ef1ng<\/td>\n<\/tr>\n<tr>\n<td>Niken<\/td>\n<td>S\u1eaft t\u1eeb<\/td>\n<td>M\u1ea1nh m\u1ebd<\/td>\n<td>Ti\u1ec1n xu, pin, th\u00e9p kh\u00f4ng g\u1ec9<\/td>\n<\/tr>\n<tr>\n<td>Kobal<\/td>\n<td>S\u1eaft t\u1eeb<\/td>\n<td>M\u1ea1nh m\u1ebd<\/td>\n<td>Nam ch\u00e2m, h\u1ee3p kim, pin<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed3ng<\/td>\n<td>V\u1eadt li\u1ec7u t\u1eeb ch\u1ed1ng<\/td>\n<td>S\u1ef1 \u0111\u1ea9y y\u1ebfu r\u1ea5t y\u1ebfu<\/td>\n<td>D\u00e2y \u0111i\u1ec7n, \u0111i\u1ec7n t\u1eed<\/td>\n<\/tr>\n<tr>\n<td>Nh\u00f4m<\/td>\n<td>V\u1eadt li\u1ec7u t\u1eeb thu\u1eadn<\/td>\n<td>H\u00fat nh\u1eb9<\/td>\n<td>H\u00e0ng kh\u00f4ng, lon, khung<\/td>\n<\/tr>\n<tr>\n<td><strong>K\u1ebdm<\/strong><\/td>\n<td><strong>V\u1eadt li\u1ec7u t\u1eeb ch\u1ed1ng<\/strong><\/td>\n<td>S\u1ef1 \u0111\u1ea9y y\u1ebfu r\u1ea5t y\u1ebfu<\/td>\n<td>L\u00e0m m\u1ea1 k\u1ebdm, \u0111\u00fac h\u1ee3p kim, h\u1ee3p kim<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<ul>\n<li><strong>Kim lo\u1ea1i ferromagnetic<\/strong> nh\u01b0 s\u1eaft, niken v\u00e0 cobalt d\u1ec5 d\u00e0ng ph\u00e2n lo\u1ea1i b\u1eb1ng nam ch\u00e2m.<\/li>\n<li><strong>Kim lo\u1ea1i ch\u1ed1ng t\u1eeb<\/strong> nh\u01b0 k\u1ebdm v\u00e0 \u0111\u1ed3ng s\u1ebd kh\u00f4ng d\u00ednh v\u00e0o nam ch\u00e2m, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 h\u1eefu \u00edch trong c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng t\u1eeb t\u00ednh.<\/li>\n<li><strong>Kim lo\u1ea1i paramagnetic<\/strong> nh\u01b0 nh\u00f4m c\u00f3 l\u1ef1c h\u00fat nh\u1eb9 nh\u01b0ng kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 ph\u00e2n lo\u1ea1i b\u1eb1ng nam ch\u00e2m th\u1ef1c t\u1ebf.<\/li>\n<\/ul>\n<p>Nh\u1eefng kh\u00e1c bi\u1ec7t n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn <strong>\u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p<\/strong>\u2014t\u1eeb s\u1ea3n xu\u1ea5t \u0111\u1ebfn t\u00e1i ch\u1ebf\u2014v\u00ec t\u1eeb t\u00ednh c\u00f3 th\u1ec3 quy\u1ebft \u0111\u1ecbnh c\u00e1ch c\u00e1c v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c x\u1eed l\u00fd, ph\u00e2n t\u00e1ch ho\u1eb7c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft b\u1ecb m\u00e0 nhi\u1ec5u t\u1eeb l\u00e0 m\u1ed1i quan t\u00e2m.<\/p>\n<h2>\u1ee8ng d\u1ee5ng v\u00e0 h\u1ea1n ch\u1ebf c\u1ee7a k\u1ebdm li\u00ean quan \u0111\u1ebfn t\u1eeb t\u00ednh<\/h2>\n<p>T\u00ednh ch\u1ea5t ch\u1ed1ng t\u1eeb c\u1ee7a k\u1ebdm c\u00f3 ngh\u0129a l\u00e0 n\u00f3 kh\u00f4ng b\u1ecb h\u00fat b\u1edfi nam ch\u00e2m, l\u00e0m cho n\u00f3 h\u1eefu \u00edch trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p n\u01a1i nhi\u1ec5u t\u1eeb l\u00e0 v\u1ea5n \u0111\u1ec1. Trong \u0111i\u1ec7n t\u1eed, v\u00ed d\u1ee5, c\u00e1c b\u1ed9 ph\u1eadn b\u1eb1ng k\u1ebdm s\u1ebd kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u1ea3m bi\u1ebfn t\u1eeb ho\u1eb7c l\u00e0m gi\u00e1n \u0111o\u1ea1n tr\u01b0\u1eddng t\u1eeb trong c\u00e1c thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m. \u0110\u00e2y c\u0169ng l\u00e0 l\u1ee3i th\u1ebf trong c\u00e1c thi\u1ebft b\u1ecb ch\u00ednh x\u00e1c, thi\u1ebft b\u1ecb y t\u1ebf v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 y\u00eau c\u1ea7u v\u1eadt li\u1ec7u kh\u00f4ng t\u1eeb t\u00ednh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 an to\u00e0n.<\/p>\n<p>Trong s\u1ea3n xu\u1ea5t, \u0111\u1eb7c t\u00ednh kh\u00f4ng t\u1eeb c\u1ee7a k\u1ebdm kh\u00f4ng quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 m\u1ea1 k\u1ebdm, n\u01a1i t\u1eadp trung v\u00e0o kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, kh\u00f4ng ph\u1ea3i t\u1eeb t\u00ednh. N\u00f3 c\u0169ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong c\u00e1c h\u1ee3p kim m\u00e0 \u0111\u1eb7c t\u00ednh kh\u00f4ng t\u1eeb t\u00ednh l\u00e0 mong mu\u1ed1n.<\/p>\n<p><strong>V\u00ed d\u1ee5 v\u1ec1 nh\u1eefng n\u01a1i \u01b0u ti\u00ean t\u00ednh kh\u00f4ng t\u1eeb c\u1ee7a k\u1ebdm:<\/strong><\/p>\n<ul>\n<li>V\u1ecf v\u00e0 gi\u00e1 \u0111\u1ee1 g\u1ea7n c\u1ea3m bi\u1ebfn t\u1eeb ho\u1eb7c la b\u00e0n<\/li>\n<li>C\u00e1c b\u1ed9 ph\u1eadn trong thi\u1ebft b\u1ecb an to\u00e0n MRI<\/li>\n<li>C\u00e1c b\u1ed9 ph\u1eadn trong h\u1ec7 th\u1ed1ng \u0111\u1ecbnh v\u1ecb n\u01a1i th\u00e9p c\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u<\/li>\n<\/ul>\n<p><strong>Nh\u1eefng th\u00e1ch th\u1ee9c ti\u1ec1m n\u0103ng c\u1ee7a k\u1ebdm trong m\u00f4i tr\u01b0\u1eddng t\u1eeb t\u00ednh:<\/strong><\/p>\n<ul>\n<li>Kh\u00f4ng th\u1ec3 ph\u00e2n lo\u1ea1i kh\u1ecfi r\u00e1c th\u1ea3i ho\u1eb7c ph\u1ebf li\u1ec7u b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n lo\u1ea1i t\u1eeb<\/li>\n<li>S\u1ebd kh\u00f4ng gi\u00fap trong c\u00e1c \u1ee9ng d\u1ee5ng ch\u1eafn t\u1eeb tr\u01b0\u1eddng n\u01a1i c\u1ea7n kim lo\u1ea1i ferromagnetic<\/li>\n<li>Kh\u00f4ng ph\u00f9 h\u1ee3p n\u01a1i l\u1ef1c h\u00fat t\u1eeb l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a thi\u1ebft k\u1ebf ho\u1eb7c ch\u1ee9c n\u0103ng<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t t\u1ea1i Vi\u1ec7t Nam, \u0111\u1eb7c bi\u1ec7t trong l\u0129nh v\u1ef1c \u0111i\u1ec7n t\u1eed, qu\u1ed1c ph\u00f2ng v\u00e0 d\u1ee5ng c\u1ee5 chuy\u00ean d\u1ee5ng, vi\u1ec7c ch\u1ecdn k\u1ebdm v\u00ec kh\u00f4ng c\u00f3 t\u1eeb t\u00ednh c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 nhi\u1ec5u v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u nghi\u00eam ng\u1eb7t c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p.<\/p>\n<h2>Vai tr\u00f2 v\u00e0 chuy\u00ean m\u00f4n c\u1ee7a NBAEM<\/h2>\n<p>T\u1ea1i NBAEM, ch\u00fang t\u00f4i l\u00e0m vi\u1ec7c v\u1edbi c\u1ea3 <strong>kim lo\u1ea1i<\/strong> v\u00e0 <strong>kh\u00f4ng t\u1eeb t\u00ednh<\/strong>, bao g\u1ed3m c\u00e1c l\u1ef1a ch\u1ecdn ch\u1ed1ng t\u1eeb nh\u01b0 k\u1ebdm. Danh m\u1ee5c c\u1ee7a ch\u00fang t\u00f4i bao g\u1ed3m nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u \u2014 t\u1eeb c\u00e1c nam ch\u00e2m ferromagnetic m\u1ea1nh nh\u01b0 s\u1eaft, niken, cobalt \u0111\u1ebfn c\u00e1c kim lo\u1ea1i c\u00f3 ph\u1ea3n \u1ee9ng t\u1eeb th\u1ea5p ho\u1eb7c b\u1eb1ng kh\u00f4ng cho c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p \u0111\u1eb7c th\u00f9. S\u1ef1 \u0111a d\u1ea1ng n\u00e0y gi\u00fap kh\u00e1ch h\u00e0ng t\u1ea1i Vi\u1ec7t Nam ch\u1ecdn ch\u00ednh x\u00e1c nh\u1eefng g\u00ec ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a h\u1ecd, d\u00f9 h\u1ecd c\u1ea7n l\u1ef1c h\u00fat t\u1eeb hay ho\u00e0n to\u00e0n trung l\u1eadp t\u1eeb t\u00ednh.<\/p>\n<p>Hi\u1ec3u r\u00f5 c\u00e1ch m\u1ed7i kim lo\u1ea1i ph\u1ea3n \u1ee9ng v\u1edbi t\u1eeb tr\u01b0\u1eddng l\u00e0 ch\u00eca kh\u00f3a khi l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u cho s\u1ea3n xu\u1ea5t, \u0111i\u1ec7n t\u1eed, x\u00e2y d\u1ef1ng ho\u1eb7c t\u00e1i ch\u1ebf. V\u00ed d\u1ee5, bi\u1ebft r\u1eb1ng k\u1ebdm kh\u00f4ng t\u1eeb t\u00ednh c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n nhi\u1ec5u trong thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m, n\u00e2ng cao an to\u00e0n s\u1ea3n ph\u1ea9m v\u00e0 t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh ph\u00e2n lo\u1ea1i.<\/p>\n<p>Ch\u00fang t\u00f4i cung c\u1ea5p h\u01b0\u1edbng d\u1eabn t\u00f9y ch\u1ec9nh \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n. N\u1ebfu b\u1ea1n \u1edf Vi\u1ec7t Nam v\u00e0 c\u1ea7n t\u01b0 v\u1ea5n chuy\u00ean m\u00f4n v\u1ec1 <strong>v\u1eadt li\u1ec7u t\u1eeb t\u00ednh<\/strong> or <strong>kim lo\u1ea1i kh\u00f4ng t\u1eeb t\u00ednh cho s\u1ea3n xu\u1ea5t<\/strong>, nh\u00f3m c\u1ee7a ch\u00fang t\u00f4i s\u1eb5n s\u00e0ng h\u1ed7 tr\u1ee3 v\u1ec1 ngu\u1ed3n cung \u1ee9ng, h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 cung c\u1ea5p s\u1ed1 l\u01b0\u1ee3ng l\u1edbn. Li\u00ean h\u1ec7 NBAEM \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n ho\u1eb7c l\u1ea5y th\u00f4ng s\u1ed1 v\u1eadt li\u1ec7u nh\u1eb1m \u0111\u1ea3m b\u1ea3o b\u1ea1n ch\u1ecdn \u0111\u00fang lo\u1ea1i ph\u00f9 h\u1ee3p v\u1edbi ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00ecnh.<\/p>","protected":false},"excerpt":{"rendered":"<p>K\u1ebdm l\u00e0 kim lo\u1ea1i phi t\u1eeb t\u00ednh kh\u00f4ng t\u1eeb v\u00e0 c\u00f3 t\u00ednh ch\u1ea5t diamagnetic, t\u00ecm hi\u1ec3u \u0111\u1eb7c t\u00ednh, \u1ee9ng d\u1ee5ng v\u00e0 c\u00e1ch t\u1eeb tr\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p<\/p>","protected":false},"author":1,"featured_media":2015,"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-2016","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/is_zinc_metal_magnetic_1GZBDxLYX.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2016","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=2016"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2016\/revisions"}],"predecessor-version":[{"id":2019,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2016\/revisions\/2019"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/2015"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=2016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=2016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=2016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}