{"id":1854,"date":"2025-08-11T02:39:46","date_gmt":"2025-08-11T02:39:46","guid":{"rendered":"https:\/\/nbaem.com\/?p=1854"},"modified":"2025-08-11T04:00:49","modified_gmt":"2025-08-11T04:00:49","slug":"which-magnets-can-withstand-high-temperatures","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/which-magnets-can-withstand-high-temperatures\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn c\u00e1c lo\u1ea1i nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao"},"content":{"rendered":"<p>B\u1ea1n c\u00f3 \u0111ang t\u1ef1 h\u1ecfi <strong>nam ch\u00e2m n\u00e0o c\u00f3 th\u1ec3 ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao<\/strong> m\u00e0 kh\u00f4ng m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh c\u1ee7a ch\u00fang? N\u1ebfu b\u1ea1n l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 nhi\u1ec7t l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh\u2014d\u00f9 l\u00e0 trong c\u1ea3m bi\u1ebfn \u00f4 t\u00f4, \u0111i\u1ec1u khi\u1ec3n h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, hay m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p\u2014vi\u1ec7c ch\u1ecdn \u0111\u00fang <strong>nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao<\/strong> l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 nam ch\u00e2m \u0111\u1ec1u ho\u1ea1t \u0111\u1ed9ng t\u1ed1t khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng l\u00ean, v\u00e0 ch\u1ecdn sai c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn th\u1ea5t b\u1ea1i t\u1eeb t\u00ednh v\u00e0 th\u1eddi gian ch\u1ebft t\u1ed1n k\u00e9m.<\/p>\n<p>Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, b\u1ea1n s\u1ebd kh\u00e1m ph\u00e1 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c lo\u1ea1i nam ch\u00e2m ph\u1ed5 bi\u1ebfn ch\u1ecbu nhi\u1ec7t t\u1ed1t, hi\u1ec3u r\u00f5 \u00fd ngh\u0129a c\u1ee7a gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 th\u1ef1c s\u1ef1, v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c c\u00e1c m\u1eb9o t\u1eeb chuy\u00ean gia \u0111\u1ec3 t\u00ecm ra lo\u1ea1i ph\u00f9 h\u1ee3p nh\u1ea5t <strong>v\u1eadt li\u1ec7u t\u1eeb ch\u1ed1ng nhi\u1ec7t<\/strong> cho m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t nh\u1ea5t c\u1ee7a b\u1ea1n. Th\u00eam v\u00e0o \u0111\u00f3, ch\u00fang t\u00f4i s\u1ebd ch\u1ec9 cho b\u1ea1n c\u00e1ch m\u00e0 NBAEM cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady, t\u00f9y ch\u1ec9nh \u0111\u1ec3 gi\u1eef cho c\u00e1c d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng m\u1ea1nh m\u1ebd d\u01b0\u1edbi \u00e1p l\u1ef1c.<\/p>\n<p>H\u00e3y b\u1eaft \u0111\u1ea7u n\u00e0o!<\/p>\n<h2>Nam ch\u00e2m n\u00e0o c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<h3>Hi\u1ec3u r\u00f5 gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a nam ch\u00e2m<\/h3>\n<p>T\u00f4i b\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch ph\u00e2n t\u00e1ch hai nhi\u1ec7t \u0111\u1ed9 ch\u00ednh m\u00e0 b\u1ea1n s\u1ebd th\u1ea5y trong b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn v\u1eadt li\u1ec7u t\u1eeb ch\u1ed1ng nhi\u1ec7t ph\u00f9 h\u1ee3p.<\/p>\n<ul>\n<li><strong>nhi\u1ec7t \u0111\u1ed9 Curie<\/strong> \u2014 \u0111\u00e2y l\u00e0 \u0111i\u1ec3m c\u01a1 b\u1ea3n n\u01a1i nam ch\u00e2m m\u1ea5t t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n v\u00e0 tr\u1edf th\u00e0nh v\u1eadt li\u1ec7u t\u1eeb t\u00ednh thu\u1eadn. Tr\u00ean nhi\u1ec7t \u0111\u1ed9 Curie, tr\u1eadt t\u1ef1 t\u1eeb c\u01a1 b\u1ea3n b\u1ecb ph\u00e1 v\u1ee1. Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, v\u01b0\u1ee3t qua \u0111i\u1ec3m Curie g\u00e2y ra <strong>t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n<\/strong> thi\u1ec7t h\u1ea1i v\u00ec c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a v\u1eadt li\u1ec7u v\u00e0 kh\u1ea3 n\u0103ng t\u1eeb c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 thay \u0111\u1ed5i.<\/li>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/strong> \u2014 \u0111\u00e2y l\u00e0 gi\u1edbi h\u1ea1n an to\u00e0n m\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f4ng b\u1ed1. N\u00f3 th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi nhi\u1ec7t \u0111\u1ed9 Curie v\u00e0 cho bi\u1ebft n\u01a1i nam ch\u00e2m s\u1ebd gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 m\u1ea1nh t\u1eeb ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng b\u00ecnh th\u01b0\u1eddng. Gi\u1eef \u1edf ho\u1eb7c d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u00e0y th\u01b0\u1eddng mang l\u1ea1i <strong>m\u1ea5t t\u1eeb t\u00ednh c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c<\/strong> l\u00e0 m\u1ea5t t\u1eeb t\u00ednh t\u1ea1m th\u1eddi: tr\u01b0\u1eddng t\u1eeb y\u1ebfu \u0111i trong khi n\u00f3ng nh\u01b0ng s\u1ebd ph\u1ee5c h\u1ed3i khi l\u00e0m m\u00e1t.<\/li>\n<\/ul>\n<p>M\u1ea5t t\u1eeb t\u00ednh c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c v\u00e0 kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c<\/p>\n<ul>\n<li>M\u1ea5t t\u1eeb t\u00ednh c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c: gi\u1ea3m flux ho\u1eb7c Br trong th\u1eddi gian ng\u1eafn \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n v\u00e0 tr\u1edf l\u1ea1i khi nam ch\u00e2m ngu\u1ed9i \u0111i. Th\u01b0\u1eddng x\u1ea3y ra khi b\u1ea1n duy tr\u00ec d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a.<\/li>\n<li>M\u1ea5t t\u1eeb t\u00ednh kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c: gi\u1ea3m v\u0129nh vi\u1ec5n \u0111\u1ed9 t\u1eeb h\u00f3a do v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a, chu k\u1ef3 nhi\u1ec7t l\u1eb7p l\u1ea1i, qu\u00e1 nhi\u1ec7t g\u1ea7n \u0111i\u1ec3m Curie ho\u1eb7c oxy h\u00f3a v\u00e0 thay \u0111\u1ed5i c\u1ea5u tr\u00fac.<\/li>\n<\/ul>\n<p>T\u1ea1i sao c\u00e1c m\u1ee9c nhi\u1ec7t \u0111\u1ed9 \u0111\u00e1nh gi\u00e1 l\u1ea1i quan tr\u1ecdng \u0111\u1ed1i v\u1edbi hi\u1ec7u su\u1ea5t v\u00e0 tu\u1ed5i th\u1ecd<\/p>\n<ul>\n<li>Nhi\u1ec7t \u0111\u1ed9 cao l\u00e0m gi\u1ea3m \u0111\u1ed9 m\u1ea1nh t\u1eeb (Br v\u00e0 s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng), \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u00f4-men xo\u1eafn, \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u1ea3m bi\u1ebfn, l\u1ef1c gi\u1eef v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a \u0111\u1ed9ng c\u01a1.<\/li>\n<li>Chu k\u1ef3 nhi\u1ec7t th\u00fac \u0111\u1ea9y <strong>s\u1ef1 suy gi\u1ea3m kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c<\/strong> ngay c\u1ea3 khi<\/li>\n<\/ul>\n<h2>Nam ch\u00e2m n\u00e0o c\u00f3 th\u1ec3 ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<h3>C\u00e1c lo\u1ea1i nam ch\u00e2m ch\u1ecbu nhi\u1ec7t ph\u1ed5 bi\u1ebfn<\/h3>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t t\u00f3m t\u1eaft nhanh, th\u1ef1c t\u1ebf v\u1ec1 lo\u1ea1i nam ch\u00e2m t\u00f4i s\u1eed d\u1ee5ng ho\u1eb7c \u0111\u1ec1 xu\u1ea5t khi nhi\u1ec7t l\u00e0 y\u1ebfu t\u1ed1. T\u00f4i gi\u1eef ng\u1eafn g\u1ecdn \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p cho nhu c\u1ea7u c\u00f4ng nghi\u1ec7p, \u00f4 t\u00f4 ho\u1eb7c thi\u1ebft b\u1ecb gia d\u1ee5ng c\u1ee7a Vi\u1ec7t Nam.<\/p>\n<ul>\n<li>Nam ch\u00e2m Alnico\n<ul>\n<li>Nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a ho\u1ea1t \u0111\u1ed9ng: kho\u1ea3ng 540\u00b0C (\u22481004\u00b0F)<\/li>\n<li>\u01afu \u0111i\u1ec3m: d\u00f2ng flux r\u1ea5t \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 cao, ph\u00f9 h\u1ee3p cho c\u1ea3m bi\u1ebfn v\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t.<\/li>\n<li>\u0110i\u1ec3m y\u1ebfu: n\u0103ng l\u01b0\u1ee3ng t\u1eeb th\u1ea5p h\u01a1n \u0111\u1ea5t hi\u1ebfm, gi\u00f2n, c\u00f3 th\u1ec3 b\u1ecb kh\u1eed t\u1eeb do s\u1ed1c ho\u1eb7c rung.<\/li>\n<li>S\u1eed d\u1ee5ng khi b\u1ea1n c\u1ea7n kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao m\u00e0 kh\u00f4ng t\u1ed1n chi ph\u00ed \u0111\u1eaft \u0111\u1ecf.<\/li>\n<\/ul>\n<\/li>\n<li>Nam ch\u00e2m Samarium Cobalt (SmCo)\n<ul>\n<li>Ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng: x\u1ea5p x\u1ec9 250\u2013350\u00b0C (\u2248482\u2013662\u00b0F) t\u00f9y thu\u1ed9c<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Nam ch\u00e2m n\u00e0o ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m \u1edf nhi\u1ec7t \u0111\u1ed9 cao<\/h3>\n<p>N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n: c\u00f3 ba y\u1ebfu t\u1ed1 ch\u00ednh quy\u1ebft \u0111\u1ecbnh c\u00e1ch nam ch\u00e2m ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u2014 b\u1ea3n th\u00e2n v\u1eadt li\u1ec7u, h\u01b0 h\u1ea1i v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc t\u1eeb nhi\u1ec7t, v\u00e0 c\u00e1ch n\u00f3 \u0111\u01b0\u1ee3c nung n\u00f3ng v\u00e0 l\u00e0m ngu\u1ed9i.<\/p>\n<p>Th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a mi\u1ec1n t\u1eeb<\/p>\n<ul>\n<li>C\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t kh\u00e1c nhau. <strong>Nhi\u1ec7t \u0111\u1ed9 cao<span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/products\/samarium-cobalt-magnets\/\" target=\"_blank\" rel=\"noopener\"> nam ch\u00e2m samarium cobalt<\/a><\/span><\/strong> v\u00e0 <strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/products\/alnico-magnet\/\" target=\"_blank\" rel=\"noopener\">Nam ch\u00e2m Alnico<\/a><\/span> kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/strong> t\u1ed1t h\u01a1n nhi\u1ec1u so v\u1edbi NdFeB ti\u00eau chu\u1ea9n.<\/li>\n<li>\u00dd ch\u00ednh: nam ch\u00e2m c\u00f3 c\u00e1c v\u00f9ng nh\u1ecf \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp th\u1eb3ng h\u00e0ng (mi\u1ec1n t\u1eeb). Nhi\u1ec7t l\u00e0m cho c\u00e1c mi\u1ec1n \u0111\u00f3 b\u1ecb x\u00e1o tr\u1ed9n. N\u1ebfu v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng l\u1ea1i s\u1ef1 x\u00e1o tr\u1ed9n \u0111\u00f3 (l\u1ef1c kh\u00e1ng t\u1eeb cao), n\u00f3 s\u1ebd gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u00ecnh.<\/li>\n<li>L\u01b0u \u00fd <strong>\u0111\u1ecbnh m\u1ee9c nhi\u1ec7t \u0111\u1ed9 nam ch\u00e2m NdFeB<\/strong> \u2014 NdFeB th\u00f4ng th\u01b0\u1eddng m\u1ea5t \u0111\u1ed9 b\u1ec1n nhanh h\u01a1n khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng. C\u00e1c lo\u1ea1i cao c\u1ea5p gi\u00fap \u00edch nh\u01b0ng v\u1eabn k\u00e9m h\u01a1n SmCo v\u00e0 Alnico.<\/li>\n<\/ul>\n<p>Oxy h\u00f3a do \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc v\u00e0 \u0103n m\u00f2n<\/p>\n<ul>\n<li>Nhi\u1ec7t l\u00e0m c\u00e1c b\u1ed9 ph\u1eadn gi\u00e3n n\u1edf v\u00e0 c\u00f3 th\u1ec3 g\u00e2y ra \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc ho\u1eb7c c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh.<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 cao l\u00e0m t\u0103ng t\u1ed1c \u0111\u1ed9 \u0103n m\u00f2n v\u00e0 oxy h\u00f3a \u2014 \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi NdFeB \u2014 t\u1ea5n c\u00f4ng b\u1ec1 m\u1eb7t nam ch\u00e2m v\u00e0 l\u00e0m gi\u1ea3m t\u1eeb t\u00ednh.<\/li>\n<li>L\u1edbp ph\u1ee7 v\u00e0 v\u1eadt li\u1ec7u ch\u1ed1ng \u0103n m\u00f2n r\u1ea5t quan tr\u1ecdng. V\u00ed d\u1ee5, SmCo c\u00f3 kh\u1ea3 n\u0103ng <strong>ch\u1ed1ng \u0103n m\u00f2n v\u00e0 \u0111\u1ed9 b\u1ec1n t\u1ed1t h\u01a1n<\/strong> so v\u1edbi nhi\u1ec1u lo\u1ea1i NdFeB.<\/li>\n<\/ul>\n<p>Chu k\u1ef3 nhi\u1ec7t v\u00e0 suy gi\u1ea3m l\u00e2u d\u00e0i<\/p>\n<ul>\n<li>M\u1ed9t s\u1ef1 ki\u1ec7n n\u00f3ng c\u00f3 th\u1ec3 \u1ed5n, nh\u01b0ng vi\u1ec7c l\u00e0m n\u00f3ng v\u00e0 l\u00e0m m\u00e1t l\u1eb7p \u0111i l\u1eb7p l\u1ea1i (chu k\u1ef3 nhi\u1ec7t) th\u01b0\u1eddng g\u00e2y ra m\u1ea5t m\u00e1t t\u00edch t\u1ee5, \u0111\u00f4i khi kh\u00f4ng th\u1ec3 ph\u1ee5c h\u1ed3i.<\/li>\n<li>Chu k\u1ef3 t\u1ea1o ra c\u0103ng th\u1eb3ng, v\u1ebft n\u1ee9t nh\u1ecf, v\u00e0 s\u1ef1 \u0111i\u1ec1u ch\u1ec9nh ho\u1eb7c m\u1ea5t t\u1eeb t\u00ednh c\u1ee7a c\u00e1c mi\u1ec1n t\u1eeb t\u1eeb. Ngay c\u1ea3 khi nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nam ch\u00e2m tr\u00f4ng c\u00f3 v\u1ebb an to\u00e0n, c\u00e1c chu k\u1ef3 th\u01b0\u1eddng xuy\u00ean v\u1eabn c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t.<\/li>\n<li>M\u1eb9o th\u1ef1c t\u1ebf:\n<ul>\n<li>Cho ph\u00e9p m\u1ed9t kho\u1ea3ng an to\u00e0n d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng.<\/li>\n<li>Ch\u1ecdn <strong>v\u1eadt li\u1ec7u t\u1eeb ch\u1ed1ng nhi\u1ec7t<\/strong> khi thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n g\u1eb7p ph\u1ea3i c\u00e1c chu k\u1ef3 l\u1eb7p l\u1ea1i.<\/li>\n<li>S\u1eed d\u1ee5ng l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 v\u00e0 thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u1edbi h\u1ea1n c\u0103ng th\u1eb3ng c\u01a1 h\u1ecdc.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u0110\u00e2y l\u00e0 nh\u1eefng th\u1ef1c t\u1ebf ch\u00ednh \u0111\u1eb1ng sau hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh d\u01b0\u1edbi nhi\u1ec7t. N\u1ebfu b\u1ea1n \u0111ang x\u00e2y d\u1ef1ng c\u00e1c thi\u1ebft b\u1ecb t\u1eeb motor \u0111\u1ebfn c\u1ea3m bi\u1ebfn trong l\u00f2 ho\u1eb7c c\u00e1c th\u00e0nh ph\u1ea7n d\u01b0\u1edbi n\u1eafp \u0111\u1ed9ng c\u01a1, h\u00e3y l\u00ean k\u1ebf ho\u1ea1ch cho v\u1eadt li\u1ec7u, b\u1ea3o v\u1ec7 v\u00e0 chu k\u1ef3 t\u1eeb \u0111\u1ea7u.<\/p>\n<h2>Nam ch\u00e2m n\u00e0o c\u00f3 th\u1ec3 ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<h3>\u1ee8ng d\u1ee5ng y\u00eau c\u1ea7u nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao<\/h3>\n<p>T\u00f4i th\u1ea5y c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn t\u1ea1i Vi\u1ec7t Nam n\u01a1i v\u1eadt li\u1ec7u t\u1eeb ch\u1ed1ng nhi\u1ec7t quan tr\u1ecdng. T\u00f4i gi\u1eef n\u00f3 th\u1ef1c t\u1ebf \u0111\u1ec3 b\u1ea1n bi\u1ebft ch\u1ecdn g\u00ec cho t\u1eebng t\u00ecnh hu\u1ed1ng.<\/p>\n<ul>\n<li>\u00d4 t\u00f4\n<ul>\n<li><strong>C\u1ea3m bi\u1ebfn d\u01b0\u1edbi n\u1eafp \u0111\u1ed9ng c\u01a1<\/strong>, b\u1ed9 truy\u1ec1n \u0111\u1ed9ng HVAC, v\u00e0 <strong>th\u00e0nh ph\u1ea7n \u0111\u1ed9ng c\u01a1<\/strong> trong h\u1ec7 truy\u1ec1n \u0111\u1ed9ng hybrid v\u00e0 xe \u0111i\u1ec7n ph\u1ea3i ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 li\u00ean t\u1ee5c. D\u1ef1 ki\u1ebfn t\u1eeb 120\u00b0C \u0111\u1ebfn 200\u00b0C \u1edf m\u1ed9t s\u1ed1 khu v\u1ef1c\u2014ch\u1ecdn <strong>nam ch\u00e2m samari cobalt ch\u1ecbu nhi\u1ec7t cao<\/strong> or <strong>C\u00e1c lo\u1ea1i nam ch\u00e2m Alnico c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/strong> cao h\u01a1n c\u00e1c lo\u1ea1i NdFeB ti\u00eau chu\u1ea9n.<\/li>\n<li>V\u00f9ng g\u1ea7n \u1ed1ng x\u1ea3 ho\u1eb7c turbo c\u1ea7n c\u00f3 l\u1edbp b\u1ea3o v\u1ec7 nhi\u1ec7t \u0111\u1eb7c bi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n<\/ul>\n<\/li>\n<li>H\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 qu\u1ed1c ph\u00f2ng\n<ul>\n<li>C\u1ea3m bi\u1ebfn \u0111i\u1ec1u khi\u1ec3n bay, b\u1ed9 truy\u1ec1n \u0111\u1ed9ng v\u00e0 thi\u1ebft b\u1ecb \u0111o l\u01b0\u1eddng trong m\u00f4i tr\u01b0\u1eddng n\u00f3ng c\u1ea7n c\u00f3 hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi nhi\u1ec7t v\u00e0 rung \u0111\u1ed9ng. <strong>SmCo<\/strong> th\u00f4ng d\u1ee5ng nh\u1edd <strong>hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh d\u01b0\u1edbi nhi\u1ec7t<\/strong> v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. Chu tr\u00ecnh nhi\u1ec7t v\u00e0 h\u1ea1n ch\u1ebf v\u1ec1 tr\u1ecdng l\u01b0\u1ee3ng r\u1ea5t quan tr\u1ecdng \u1edf \u0111\u00e2y.<\/li>\n<\/ul>\n<\/li>\n<li>M\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p\n<ul>\n<li>\u0110\u1ed9ng c\u01a1 \u0111i\u1ec7n, m\u00e1y ph\u00e1t \u0111i\u1ec7n v\u00e0 thi\u1ebft b\u1ecb x\u1eed l\u00fd nhi\u1ec7t \u0111\u1ed9 cao (l\u00f2 nung, l\u00f2 nung, d\u00e2y chuy\u1ec1n x\u1eed l\u00fd nhi\u1ec7t) y\u00eau c\u1ea7u <strong>nam ch\u00e2m c\u00f4ng nghi\u1ec7p \u0111\u1ec3 ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t<\/strong>. T\u00f4i khuy\u00ean d\u00f9ng c\u00e1c v\u1eadt li\u1ec7u c\u00f3 <strong>gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a nam ch\u00e2m<\/strong> r\u00f5 r\u00e0ng v\u00e0 l\u1ef1c kh\u00e1ng t\u1eeb cao \u0111\u1ec3 ch\u1ed1ng kh\u1eed t\u1eeb trong c\u00e1c \u0111\u1ee3t t\u0103ng nhi\u1ec7t.<\/li>\n<\/ul>\n<\/li>\n<li>Thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t\n<ul>\n<li>C\u1ea3m bi\u1ebfn b\u00ean trong l\u00f2 n\u01b0\u1edbng, thi\u1ebft b\u1ecb n\u1ea5u \u0103n th\u01b0\u01a1ng m\u1ea1i v\u00e0 m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb gia d\u1ee5ng nh\u1ea5t \u0111\u1ecbnh ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t l\u1eb7p \u0111i l\u1eb7p l\u1ea1i. \u0110\u1ed1i v\u1edbi c\u00e1c chu tr\u00ecnh l\u1eb7p l\u1ea1i, h\u00e3y ch\u1ecdn lo\u1ea1i \u0111\u01b0\u1ee3c x\u1ebfp h\u1ea1ng cho \u0111\u1ec9nh v\u00e0 chu tr\u00ecnh d\u1ef1 ki\u1ebfn\u2014<strong>\u0111\u1ecbnh m\u1ee9c nhi\u1ec7t \u0111\u1ed9 nam ch\u00e2m NdFeB<\/strong> ph\u00f9 h\u1ee3p cho nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n, nh\u01b0ng n\u00ean tr\u00e1nh d\u00f9ng cho nhi\u1ec7t \u0111\u1ed9 duy tr\u00ec &gt;150\u2013200\u00b0C.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>M\u1eb9o nhanh ch\u00ednh<\/p>\n<ul>\n<li>\u0110\u1ed1i v\u1edbi &gt;200\u00b0C: h\u00e3y c\u00e2n nh\u1eafc <strong>samari coban<\/strong> or <strong>Alnico<\/strong>.<\/li>\n<li>\u0110\u1ed1i v\u1edbi chi ph\u00ed nh\u1ea1y c\u1ea3m, nhi\u1ec7t \u0111\u1ed9 v\u1eeba ph\u1ea3i: <strong>nam ch\u00e2m ferit g\u1ed1m<\/strong> ho\u1ea1t \u0111\u1ed9ng t\u1ed1t t\u1edbi ~250\u00b0C trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 kh\u00f4ng quan tr\u1ecdng.<\/li>\n<li>H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn chu tr\u00ecnh nhi\u1ec7t, qu\u00e1 tr\u00ecnh oxy h\u00f3a v\u00e0 \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc \u2014 t\u1ea5t c\u1ea3 \u0111\u1ec1u l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd ngay c\u1ea3 khi \u0111\u1ecbnh m\u1ee9c nhi\u1ec7t t\u0129nh c\u1ee7a nam ch\u00e2m c\u00f3 v\u1ebb \u1ed5n.<\/li>\n<\/ul>\n<h2>Nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao c\u1ee7a Gi\u1ea3i ph\u00e1p NBAEM<\/h2>\n<p>Ch\u00fang t\u00f4i gi\u00fap kh\u00e1ch h\u00e0ng t\u1ea1i Vi\u1ec7t Nam ch\u1ecdn v\u1eadt li\u1ec7u t\u1eeb t\u00ednh ch\u1ecbu nhi\u1ec7t ch\u1ed1ng nhi\u1ec7t th\u1eadt s\u1ef1 ho\u1ea1t \u0111\u1ed9ng trong th\u1ef1c t\u1ebf. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1i nh\u00ecn r\u00f5 r\u00e0ng v\u1ec1 ph\u1ea1m vi s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i, c\u00e1c t\u00f9y ch\u1ecdn t\u00f9y ch\u1ec9nh, ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 c\u00e1c v\u00ed d\u1ee5 th\u1ef1c t\u1ebf \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 ph\u00f9 h\u1ee3p gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 v\u1edbi d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh.<\/p>\n<h3>D\u00f2ng s\u1ea3n ph\u1ea9m v\u00e0 v\u1eadt li\u1ec7u c\u00f3 s\u1eb5n<\/h3>\n<p>Ch\u00fang t\u00f4i l\u01b0u kho v\u00e0 s\u1ea3n xu\u1ea5t c\u00e1c lo\u1ea1i nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao ph\u1ed5 bi\u1ebfn:<\/p>\n<ul>\n<li>Samarium cobalt (Nam ch\u00e2m samarium cobalt ch\u1ecbu nhi\u1ec7t cao) \u2014 \u1ed5n \u0111\u1ecbnh v\u00e0 ch\u1ed1ng \u0103n m\u00f2n l\u00ean \u0111\u1ebfn kho\u1ea3ng 250\u2013350\u00b0C. T\u1ed1t nh\u1ea5t khi hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh ph\u1ea3i duy tr\u00ec \u1ed5n \u0111\u1ecbnh.<\/li>\n<li>Alnico (Nam ch\u00e2m Alnico ch\u1ecbu nhi\u1ec7t) \u2014 ch\u1ecbu nhi\u1ec7t r\u1ea5t cao (\u0111\u1ebfn ~540\u00b0C) nh\u01b0ng c\u00f3 \u0111\u1ed9 c\u01b0\u1ee1ng t\u1eeb th\u1ea5p h\u01a1n; ph\u00f9 h\u1ee3p cho c\u1ea3m bi\u1ebfn v\u00e0 \u0111\u1ed9ng c\u01a1 \u0111\u01a1n gi\u1ea3n.<\/li>\n<li>NdFeB ch\u1ecbu nhi\u1ec7t cao (\u0110\u00e1nh gi\u00e1 nhi\u1ec7t \u0111\u1ed9 nam ch\u00e2m NdFeB) \u2014 c\u00f3 s\u1eb5n c\u00e1c lo\u1ea1i x\u1ebfp h\u1ea1ng l\u00ean \u0111\u1ebfn ~200\u00b0C cho nhu c\u1ea7u c\u01b0\u1eddng \u0111\u1ed9 cao nh\u1ecf g\u1ecdn; tr\u00e1nh n\u01a1i nhi\u1ec7t \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n.<\/li>\n<li>Ferrite g\u1ed1m (Nam ch\u00e2m ferrite g\u1ed1m) \u2014 ti\u1ebft ki\u1ec7m chi ph\u00ed, ch\u1ecbu nhi\u1ec7t trung b\u00ecnh l\u00ean \u0111\u1ebfn ~250\u00b0C.<\/li>\n<\/ul>\n<h3>Gi\u1ea3i ph\u00e1p nam ch\u00e2m t\u00f9y ch\u1ec9nh ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u1ee7a b\u1ea1n<\/h3>\n<p>Ch\u00fang t\u00f4i thi\u1ebft k\u1ebf nam ch\u00e2m ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh th\u1ef1c t\u1ebf:<\/p>\n<ul>\n<li>X\u00e1c \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a, chu k\u1ef3 nhi\u1ec7t v\u00e0 m\u00f4i tr\u01b0\u1eddng (\u0111\u1ed9 \u1ea9m, ch\u1ea5t \u0103n m\u00f2n).<\/li>\n<li>Ch\u1ecdn v\u1eadt li\u1ec7u, c\u1ea5p \u0111\u1ed9 v\u00e0 l\u1edbp ph\u1ee7 (k\u1ebdm, epoxy, m\u1ea1 \u0111\u1eb7c bi\u1ec7t) \u0111\u1ec3 ch\u1ed1ng oxy h\u00f3a v\u00e0 \u0103n m\u00f2n.<\/li>\n<li>Cung c\u1ea5p h\u00ecnh d\u1ea1ng, k\u00edch th\u01b0\u1edbc v\u00e0 l\u1eafp r\u00e1p t\u00f9y ch\u1ec9nh cho c\u00e1c h\u00ecnh d\u1ea1ng ch\u1eb7t ch\u1ebd trong \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn ho\u1eb7c l\u00f2 nung.<\/li>\n<li>Cung c\u1ea5p nguy\u00ean m\u1eabu v\u00e0 c\u00e1c l\u00f4 m\u1eabu \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 x\u00e1c nh\u1eadn hi\u1ec7u su\u1ea5t tr\u01b0\u1edbc khi s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t.<\/li>\n<\/ul>\n<h3>Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng nh\u1eafm v\u00e0o \u0111\u1ed9 tin c\u1eady nhi\u1ec7t<\/h3>\n<p>Ch\u00fang t\u00f4i ki\u1ec3m tra hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh l\u00e2u d\u00e0i d\u01b0\u1edbi nhi\u1ec7t:<\/p>\n<ul>\n<li>Ki\u1ec3m tra chu k\u1ef3 nhi\u1ec7t v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n<li>\u0110o flux \u1edf nhi\u1ec7t \u0111\u1ed9 v\u00e0 sau khi l\u00e0m m\u00e1t \u0111\u1ec3 ph\u00e1t hi\u1ec7n m\u1ea5t t\u1eeb t\u00ednh c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c ho\u1eb7c kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c \u2014 ki\u1ec3m tra \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc, ki\u1ec3m tra k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 b\u00e1m d\u00ednh l\u1edbp ph\u1ee7.<\/li>\n<li>C\u00e1c b\u00e0i ki\u1ec3m tra m\u00f4i tr\u01b0\u1eddng nh\u01b0 phun mu\u1ed1i theo y\u00eau c\u1ea7u cho c\u00e1c b\u1ed9 ph\u1eadn d\u1ec5 \u0103n m\u00f2n.<\/li>\n<li>H\u1ed7 tr\u1ee3 t\u00e0i li\u1ec7u v\u1ec1 tu\u00e2n th\u1ee7 v\u1eadt li\u1ec7u (RoHS\/REACH) v\u00e0 b\u00e1o c\u00e1o ki\u1ec3m tra \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u chu\u1ed7i cung \u1ee9ng t\u1ea1i Vi\u1ec7t Nam.<\/li>\n<\/ul>\n<h3>Nghi\u00ean c\u1ee9u \u0111i\u1ec3n h\u00ecnh v\u00e0 v\u00ed d\u1ee5 th\u1ef1c t\u1ebf<\/h3>\n<ul>\n<li>C\u1ea3m bi\u1ebfn \u00f4 t\u00f4: Thay th\u1ebf nam ch\u00e2m NdFeB ti\u00eau chu\u1ea9n b\u1eb1ng SmCo cho c\u1ea3m bi\u1ebfn d\u01b0\u1edbi n\u1eafp \u0111\u1ed9ng c\u01a1 ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 180\u2013220\u00b0C. K\u1ebft qu\u1ea3: \u0111\u1ea7u ra \u1ed5n \u0111\u1ecbnh, \u00edt l\u1ed7i trong tr\u01b0\u1eddng t\u1eeb.<\/li>\n<li>C\u00f4ng t\u1eafc l\u00f2 c\u00f4ng nghi\u1ec7p: S\u1eed d\u1ee5ng Alnico cho b\u1ed9 truy\u1ec1n \u0111\u1ed9ng ch\u1ecbu nhi\u1ec7t cao ho\u1ea1t \u0111\u1ed9ng g\u1ea7n 350\u00b0C \u2014 gi\u1eef t\u1eeb \u0111\u01a1n gi\u1ea3n, \u0111\u00e1ng tin c\u1eady m\u00e0 kh\u00f4ng c\u1ea7n l\u00e0m m\u00e1t ph\u1ee9c t\u1ea1p.<\/li>\n<li>\u0110\u1ed9ng c\u01a1 ch\u1ecbu nhi\u1ec7t nh\u1ecf: Cung c\u1ea5p lo\u1ea1i NdFeB ch\u1ecbu nhi\u1ec7t cao c\u00f3 l\u1edbp ph\u1ee7 \u0111\u1eb7c bi\u1ec7t v\u00e0 ki\u1ec3m tra chu k\u1ef3 nhi\u1ec7t \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi b\u0103ng t\u1ea3i c\u00f3 nhi\u1ec7t \u0111\u1ed9 \u0111\u00e1nh gi\u00e1 l\u00ean \u0111\u1ebfn 180\u00b0C.<\/li>\n<\/ul>\n<p>N\u1ebfu b\u1ea1n c\u1ea7n gi\u00fap \u0111\u1ee1 ch\u1ecdn l\u1ef1a gi\u1eefa nam ch\u00e2m Alnico ch\u1ecbu nhi\u1ec7t, nam ch\u00e2m samarium cobalt ch\u1ecbu nhi\u1ec7t cao, ho\u1eb7c c\u00e1c t\u00f9y ch\u1ecdn x\u1ebfp h\u1ea1ng nhi\u1ec7t c\u1ee7a nam ch\u00e2m NdFeB cho \u1ee9ng d\u1ee5ng t\u1ea1i Vi\u1ec7t Nam, ch\u00fang t\u00f4i s\u1ebd t\u00ednh to\u00e1n, t\u1ea1o m\u1eabu th\u1eed v\u00e0 ki\u1ec3m tra \u0111\u1ec3 nam ch\u00e2m b\u1ea1n ch\u1ecdn c\u00f3 \u0111\u1ed9 b\u1ec1n \u1edf n\u01a1i c\u1ea7n thi\u1ebft.<\/p>\n<h2>Nam ch\u00e2m n\u00e0o ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/high-temperature_magnet_selection_sGV.webp\" alt=\"L\u1ef1a ch\u1ecdn nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao\" \/><\/p>\n<h3>M\u1eb9o ch\u1ecdn nam ch\u00e2m ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao<\/h3>\n<p>T\u00f4i gi\u1eef ng\u1eafn g\u1ecdn v\u00e0 th\u1ef1c t\u1ebf \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 \u0111\u01b0a ra l\u1ef1a ch\u1ecdn \u0111\u00fang nhanh ch\u00f3ng.<\/p>\n<ul>\n<li><strong>B\u1eaft \u0111\u1ea7u v\u1edbi nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a th\u1ef1c t\u1ebf<\/strong>\n<ul>\n<li>Bi\u1ebft nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh li\u00ean t\u1ee5c, c\u00e1c \u0111\u1ec9nh ng\u1eafn v\u00e0 bi\u00ean \u0111\u1ed9 an to\u00e0n (th\u01b0\u1eddng l\u00e0 +20\u201350\u00b0C).<\/li>\n<li>Nh\u1edb nhi\u1ec7t \u0111\u1ed9 Curie: ch\u1ecdn nam ch\u00e2m c\u00f3 \u0111i\u1ec3m Curie v\u00e0 kh\u1ea3 n\u0103ng gi\u1eef nhi\u1ec7t v\u1eadn h\u00e0nh cao h\u01a1n nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a c\u1ee7a b\u1ea1n.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Ngh\u0129 v\u1ec1 chu k\u1ef3 nhi\u1ec7t thay v\u00ec ch\u1ec9 nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec9nh<\/strong>\n<ul>\n<li>Nhi\u1ec7t \u0111\u1ed9 l\u1eb7p l\u1ea1i g\u00e2y m\u1ea5t m\u00e1t l\u00e2u d\u00e0i nhi\u1ec1u h\u01a1n so v\u1edbi m\u1ed9t \u0111\u1ec9nh nhi\u1ec7t \u0111\u01a1n l\u1ebb.<\/li>\n<li>Ch\u1ecdn v\u1eadt li\u1ec7u c\u00f3 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh trong chu k\u1ef3 nhi\u1ec7t (v\u00ed d\u1ee5, nam ch\u00e2m samarium cobalt ch\u1ecbu nhi\u1ec7t cao h\u01a1n NdFeB qua nhi\u1ec1u chu k\u1ef3).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Ki\u1ec3m tra kh\u1ea3 n\u0103ng gi\u1eef l\u1ef1c t\u1eeb qua ph\u1ea1m vi c\u1ee7a b\u1ea1n<\/strong>\n<ul>\n<li>Y\u00eau c\u1ea7u \u0111\u01b0\u1eddng cong BH ho\u1eb7c d\u1eef li\u1ec7u h\u1ec7 s\u1ed1 nhi\u1ec7t t\u1eeb nh\u00e0 cung c\u1ea5p.<\/li>\n<li>So s\u00e1nh ph\u1ea7n tr\u0103m m\u1ea5t flux d\u1ef1 ki\u1ebfn t\u1ea1i nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a c\u1ee7a b\u1ea1n \u2014 c\u00e1c lo\u1ea1i c\u1ea5p kh\u00e1c nhau ho\u1ea1t \u0111\u1ed9ng r\u1ea5t kh\u00e1c nhau.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Ph\u00f9 h\u1ee3p v\u1eadt li\u1ec7u v\u1edbi m\u00f4i tr\u01b0\u1eddng v\u00e0 t\u1ea3i tr\u1ecdng<\/strong>\n<ul>\n<li>\u0102n m\u00f2n ho\u1eb7c oxy h\u00f3a? Ch\u1ecdn v\u1eadt li\u1ec7u ch\u1ed1ng \u0103n m\u00f2n ho\u1eb7c s\u1eed d\u1ee5ng l\u1edbp ph\u1ee7 ph\u00f9 h\u1ee3p.<\/li>\n<li>\u00c1p l\u1ef1c c\u01a1 h\u1ecdc ho\u1eb7c rung \u0111\u1ed9ng? C\u00e2n nh\u1eafc v\u1eadt li\u1ec7u b\u1ec1n h\u01a1n v\u00e0 l\u1eafp \u0111\u1eb7t ch\u1eafc ch\u1eafn.<\/li>\n<li>Th\u01b0\u01a1ng l\u01b0\u1ee3ng \u0111i\u1ec3n h\u00ecnh: nam ch\u00e2m Alnico ch\u1ecbu nhi\u1ec7t cao nh\u01b0ng c\u00f3 \u0111\u1ed9 c\u01b0\u1ee1ng t\u1eeb th\u1ea5p h\u01a1n; x\u1ebfp h\u1ea1ng nhi\u1ec7t c\u1ee7a nam ch\u00e2m NdFeB thay \u0111\u1ed5i theo c\u1ea5p v\u00e0 c\u00f3 th\u1ec3 c\u1ea7n b\u1ea3o v\u1ec7; g\u1ed1m s\u1ee9 ferrite v\u00e0 SmCo cung c\u1ea5p kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 \u1ed5n \u0111\u1ecbnh t\u1ed1t.<\/li>\n<\/ul>\n<\/li>\n<li><strong>L\u1eadp k\u1ebf ho\u1ea1ch l\u1edbp ph\u1ee7 v\u00e0 v\u1ecf b\u1ecdc c\u1ea9n th\u1eadn<\/strong>\n<ul>\n<li>Nhi\u1ec1u l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 th\u1ea5t b\u1ea1i \u1edf nhi\u1ec7t \u0111\u1ed9 cao. C\u00e2n nh\u1eafc v\u1ecf th\u00e9p kh\u00f4ng g\u1ec9 ho\u1eb7c ni\u00eam phong ch\u1ecbu nhi\u1ec7t cao thay v\u00ec m\u1ea1 ti\u00eau chu\u1ea9n.<\/li>\n<li>\u0110\u1ed1i v\u1edbi l\u00f2 n\u01b0\u1edbng th\u1ef1c ph\u1ea9m, \u0111\u1ed9ng c\u01a1 ho\u1eb7c thi\u1ebft b\u1ecb tr\u00ean t\u00e0u trong th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam, h\u1ecfi v\u1ec1 l\u1edbp ho\u00e0n thi\u1ec7n \u0111\u1ea1t chu\u1ea9n NSF ho\u1eb7c h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 khi c\u1ea7n thi\u1ebft.<\/li>\n<\/ul>\n<\/li>\n<li><strong>L\u00e0m vi\u1ec7c v\u1edbi nh\u00e0 cung c\u1ea5p th\u1eed nghi\u1ec7m v\u00e0 t\u1ea1o m\u1eabu<\/strong>\n<ul>\n<li>T\u00f4i \u0111\u1ec1 xu\u1ea5t h\u1ee3p t\u00e1c v\u1edbi \u0111\u1ed1i t\u00e1c nh\u01b0 NBAEM \u0111\u1ec3:\n<ul>\n<li>l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u (SmCo, Alnico, NdFeB nhi\u1ec7t \u0111\u1ed9 cao, ferrite)<\/li>\n<li>c\u00e1c lo\u1ea1i v\u00e0 h\u00ecnh d\u1ea1ng t\u00f9y ch\u1ec9nh<\/li>\n<li>ki\u1ec3m tra chu k\u1ef3 nhi\u1ec7t v\u00e0 hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 cao<\/li>\n<li>nghi\u00ean c\u1ee9u m\u1eabu nh\u1ecf v\u00e0 ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>Danh s\u00e1ch ki\u1ec3m tra nhanh tr\u01b0\u1edbc khi mua<\/strong>\n<ul>\n<li>Nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u1ed9t bi\u1ebfn nhi\u1ec7t<\/li>\n<li>S\u1ed1 chu k\u1ef3 nhi\u1ec7t d\u1ef1 ki\u1ebfn<\/li>\n<li>Ph\u1ea7n tr\u0103m gi\u1eef t\u1eeb tr\u01b0\u1eddng y\u00eau c\u1ea7u t\u1ea1i nhi\u1ec7t \u0111\u1ed9<\/li>\n<li>M\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n ho\u1eb7c oxy h\u00f3a<\/li>\n<li>T\u1ea3i c\u01a1 h\u1ecdc v\u00e0 ph\u01b0\u01a1ng ph\u00e1p g\u1eafn k\u1ebft<\/li>\n<li>C\u1ea7n ph\u1ee7 ho\u1eb7c v\u1ecf b\u1ea3o v\u1ec7 cho nhi\u1ec7t \u0111\u1ed9 cao<\/li>\n<li>Y\u00eau c\u1ea7u nh\u00e0 cung c\u1ea5p cung c\u1ea5p d\u1eef li\u1ec7u th\u1eed nghi\u1ec7m v\u00e0 m\u1eabu th\u1eed<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>Xu h\u01b0\u1edbng t\u01b0\u01a1ng lai c\u1ee7a nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao<\/h2>\n<p>T\u00f4i \u0111ang theo d\u00f5i m\u1ed9t s\u1ed1 xu h\u01b0\u1edbng r\u00f5 r\u00e0ng quan tr\u1ecdng \u0111\u1ed1i v\u1edbi kh\u00e1ch h\u00e0ng t\u1ea1i Vi\u1ec7t Nam c\u1ea7n v\u1eadt li\u1ec7u t\u1eeb ch\u1ed1ng nhi\u1ec7t trong thi\u1ebft b\u1ecb th\u1ef1c t\u1ebf.<\/p>\n<ul>\n<li>C\u00f4ng ngh\u1ec7 nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm ti\u00ean ti\u1ebfn\n<ul>\n<li><strong>Ph\u00e2n t\u00e1n qua gi\u1edbi h\u1ea1n tinh th\u1ec3 v\u00e0 \u0111\u1ed9 c\u01b0\u1ee1ng t\u1eeb NdFeB<\/strong> n\u00e2ng cao nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c c\u1ee7a nam ch\u00e2m NdFeB m\u00e0 kh\u00f4ng gi\u1ea3m \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 m\u1ea1nh. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 m\u1ed9t s\u1ed1 lo\u1ea1i NdFeB c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng g\u1ea7n 200\u00b0C v\u1edbi kh\u1ea3 n\u0103ng gi\u1eef t\u1eeb t\u1ed1t h\u01a1n<\/li>\n<li><strong>C\u1ea3i ti\u1ebfn SmCo<\/strong> t\u1eadp trung v\u00e0o kh\u1ea3 n\u0103ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t t\u1ed1t h\u01a1n n\u1eefa cho m\u00f4i tr\u01b0\u1eddng 250\u2013350\u00b0C.<\/li>\n<\/ul>\n<\/li>\n<li>V\u1eadt li\u1ec7u m\u1edbi v\u00e0 composite\n<ul>\n<li>Nghi\u00ean c\u1ee9u v\u00e0o <strong>h\u1ee3p kim t\u1eeb t\u00ednh ch\u1ecbu nhi\u1ec7t v\u00e0 composite li\u00ean k\u1ebft<\/strong> nh\u1eafm \u0111\u1ebfn \u0111\u1ea9y nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh v\u01b0\u1ee3t qua gi\u1edbi h\u1ea1n hi\u1ec7n t\u1ea1i trong khi v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n<\/ul>\n<\/li>\n<li>T\u1ed1t h\u01a1n v\u00e0 k\u00edn kh\u00ed\n<ul>\n<li><strong>L\u1edbp ph\u1ee7 c\u1ea3i ti\u1ebfn (g\u1ed1m, nickel, ni\u00eam phong k\u00edn kh\u00ed)<\/strong> gi\u1ea3m oxy h\u00f3a v\u00e0 ph\u00e2n h\u1ee7y nhi\u1ec7t, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng cho \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i trong l\u00f2 nung, khoang \u0111\u1ed9ng c\u01a1 v\u00e0 quy tr\u00ecnh nhi\u1ec7t c\u00f4ng nghi\u1ec7p.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Ti\u1ebfn b\u1ed9 trong s\u1ea3n xu\u1ea5t<\/p>\n<ul>\n<li><strong>S\u1ea3n xu\u1ea5t c\u1ed9ng th\u00eam v\u00e0 \u00e9p n\u00f3ng<\/strong> gi\u00fap ch\u00fang ta t\u1ea1o ra c\u00e1c h\u00ecnh d\u1ea1ng ph\u1ee9c t\u1ea1p v\u00e0 c\u1ea5u tr\u00fac vi t\u1ed1i \u01b0u ch\u1ecbu \u0111\u01b0\u1ee3c chu k\u1ef3 nhi\u1ec7t. \u0110i\u1ec1u n\u00e0y h\u1ed7 tr\u1ee3 \u0111\u1ed9ng c\u01a1 v\u00e0 c\u1ea3m bi\u1ebfn trong h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 xe \u0111i\u1ec7n.<\/li>\n<li>X\u1eed l\u00fd \u0111\u1ea5t hi\u1ebfm g\u1ea7n ngu\u1ed3n h\u01a1n t\u1ea1i Vi\u1ec7t Nam c\u0169ng \u0111ang c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh cho c\u00e1c nam ch\u00e2m samari-cobalt nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 c\u00e1c lo\u1ea1i NdFeB \u0111\u1eb7c bi\u1ec7t.<\/li>\n<li>Ki\u1ec3m tra v\u00e0 t\u1eadp trung v\u00e0o v\u00f2ng \u0111\u1eddi\n<ul>\n<li>D\u1ef1 ki\u1ebfn s\u1ebd c\u00f3 nhi\u1ec1u b\u00e0i ki\u1ec3m tra chu k\u1ef3 nhi\u1ec7t t\u0103ng t\u1ed1c nghi\u00eam ng\u1eb7t h\u01a1n v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n x\u1ebfp h\u1ea1ng \u0111\u1ec3 k\u1ef9 s\u01b0 bi\u1ebft \u0111\u01b0\u1ee3c hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m qua nhi\u1ec1u n\u0103m, kh\u00f4ng ch\u1ec9 \u1edf m\u1ed9t nhi\u1ec7t \u0111\u1ed9.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>N\u1ebfu b\u1ea1n thi\u1ebft k\u1ebf cho nhi\u1ec7t, c\u00e1c xu h\u01b0\u1edbng n\u00e0y mang l\u1ea1i nhi\u1ec1u l\u1ef1a ch\u1ecdn h\u01a1n: hi\u1ec7u su\u1ea5t cao h\u01a1n \u1edf nhi\u1ec7t \u0111\u1ed9 cao, l\u1edbp ph\u1ee7 t\u1ed1t h\u01a1n v\u00e0 s\u1ea3n xu\u1ea5t th\u00f4ng minh h\u01a1n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p Vi\u1ec7t Nam.<\/p>","protected":false},"excerpt":{"rendered":"<p>C\u00e1c lo\u1ea1i nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao T\u00ecm hi\u1ec3u c\u00e1c lo\u1ea1i nam ch\u00e2m Alnico SmCo NdFeB v\u00e0 ferrite ch\u1ecbu nhi\u1ec7t l\u00ean \u0111\u1ebfn 540\u00b0C xem c\u00e1c gi\u1ea3i ph\u00e1p c\u1ee7a NBAEM<\/p>","protected":false},"author":1,"featured_media":1853,"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-1854","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\/high-temperature_permanent_Qeh.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1854","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=1854"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1854\/revisions"}],"predecessor-version":[{"id":1859,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1854\/revisions\/1859"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1853"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1854"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1854"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1854"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}