{"id":3078,"date":"2025-09-26T01:49:27","date_gmt":"2025-09-26T01:49:27","guid":{"rendered":"https:\/\/nbaem.com\/?p=3078"},"modified":"2025-09-26T02:06:41","modified_gmt":"2025-09-26T02:06:41","slug":"are-samarium-cobalt-magnets-stronger-than-neodymium","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/are-samarium-cobalt-magnets-stronger-than-neodymium\/","title":{"rendered":"Nam ch\u00e2m Samarium Cobalt c\u00f3 m\u1ea1nh h\u01a1n nam ch\u00e2m Neodymium kh\u00f4ng"},"content":{"rendered":"<h2>So s\u00e1nh nam ch\u00e2m samarium cobalt (SmCo) v\u00e0 neodymium (NdFeB)<\/h2>\n<p>Khi so s\u00e1nh c\u00e1c lo\u1ea1i nam ch\u00e2m nh\u01b0 nam ch\u00e2m samarium cobalt (SmCo) v\u00e0 nam ch\u00e2m neodymium (NdFeB), vi\u1ec7c hi\u1ec3u v\u1ec1 \u0111\u1ed9 m\u1ea1nh c\u1ee7a ch\u00fang b\u1eaft \u0111\u1ea7u t\u1eeb c\u00e1c ch\u1ec9 s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh. Ch\u1ec9 s\u1ed1 ch\u00ednh l\u00e0 <strong>s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a (BHmax)<\/strong>, cho bi\u1ebft l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng t\u1eeb tr\u01b0\u1eddng m\u00e0 m\u1ed9t nam ch\u00e2m c\u00f3 th\u1ec3 l\u01b0u tr\u1eef. BHmax cao h\u01a1n c\u00f3 ngh\u0129a l\u00e0 nam ch\u00e2m m\u1ea1nh h\u01a1n v\u1edbi k\u00edch th\u01b0\u1edbc nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<p>C\u00e1c y\u1ebfu t\u1ed1 quan tr\u1ecdng kh\u00e1c bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb<\/strong>: Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb t\u00ednh. Coercivity cao h\u01a1n c\u00f3 ngh\u0129a l\u00e0 nam ch\u00e2m gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 m\u1ea1nh t\u1ed1t h\u01a1n d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1eeb tr\u01b0\u1eddng b\u00ean ngo\u00e0i ho\u1eb7c nhi\u1ec7t \u0111\u1ed9.<\/li>\n<li><strong>M\u1eadt \u0111\u1ed9 t\u1eeb d\u01b0 (Br)<\/strong>: M\u1eadt \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng m\u00e0 nam ch\u00e2m t\u1ea1o ra trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4ng c\u00f3 t\u1eeb tr\u01b0\u1eddng b\u00ean ngo\u00e0i. N\u00f3 ph\u1ea3n \u00e1nh \u0111\u1ed9 m\u1ea1nh n\u1ed9i t\u1ea1i c\u1ee7a nam ch\u00e2m.<\/li>\n<li><strong>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t<\/strong>: C\u00e1ch m\u00e0 \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m thay \u0111\u1ed5i khi ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao. M\u1ed9t s\u1ed1 nam ch\u00e2m m\u1ea5t hi\u1ec7u su\u1ea5t nhanh h\u01a1n khi b\u1ecb nung n\u00f3ng.<\/li>\n<li><strong>Ch\u1ed1ng \u0103n m\u00f2n<\/strong>: Kh\u1ea3 n\u0103ng ch\u1ed1ng oxy h\u00f3a ho\u1eb7c h\u01b0 h\u1ecfng m\u00f4i tr\u01b0\u1eddng, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n.<\/li>\n<li><strong>Thu\u1ed9c t\u00ednh c\u01a1 h\u1ecdc<\/strong>: Gi\u00f2n, c\u1ee9ng v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu t\u00e1c \u0111\u1ed9ng ho\u1eb7c gia c\u00f4ng c\u1ee7a nam ch\u00e2m.<\/li>\n<\/ul>\n<p>C\u00e1c ch\u1ec9 s\u1ed1 ch\u00ednh n\u00e0y gi\u00fap k\u1ef9 s\u01b0 v\u00e0 ng\u01b0\u1eddi mua x\u00e1c \u0111\u1ecbnh nam ch\u00e2m ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3. Trong khi BHmax cung c\u1ea5p m\u1ed9t con s\u1ed1 v\u1ec1 \u0111\u1ed9 m\u1ea1nh t\u1ed5ng th\u1ec3, c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 coercivity v\u00e0 hi\u1ec7u su\u1ea5t nhi\u1ec7t \u0111\u1ed9 h\u00ecnh th\u00e0nh \u0111\u1ed9 tin c\u1eady v\u00e0 hi\u1ec7u qu\u1ea3 th\u1ef1c t\u1ebf. Hi\u1ec3u r\u00f5 c\u00e1c ch\u1ec9 s\u1ed1 n\u00e0y gi\u00fap ch\u00fang ta \u0111i s\u00e2u h\u01a1n v\u00e0o c\u00e1ch nam ch\u00e2m samarium cobalt v\u00e0 nam ch\u00e2m neodymium ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n.<\/p>\n<h2>T\u1ed5ng quan v\u1ec1 nam ch\u00e2m Samarium Cobalt SmCo<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/Samarium_Cobalt_Magnets_Properties_and_Performance.webp\" alt=\"Thu\u1ed9c t\u00ednh v\u00e0 Hi\u1ec7u su\u1ea5t c\u1ee7a Nam ch\u00e2m Samarium Cobalt\" \/><\/p>\n<p>Nam ch\u00e2m samarium cobalt (SmCo) l\u00e0 m\u1ed9t lo\u1ea1i nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm n\u1ed5i ti\u1ebfng v\u1edbi \u0111\u1eb7c t\u00ednh t\u1eeb m\u1ea1nh v\u00e0 \u0111\u1ed9 b\u1ec1n v\u01b0\u1ee3t tr\u1ed9i. Ch\u00fang \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb h\u1ee3p kim c\u1ee7a samarium, cobalt v\u00e0 c\u00e1c nguy\u00ean t\u1ed1 kh\u00e1c, s\u1ea3n xu\u1ea5t qua quy tr\u00ecnh luy\u1ec7n kim b\u1ed9t g\u1ed3m n\u00e9n v\u00e0 nung k\u1ebft th\u00e0nh nam ch\u00e2m r\u1eafn.<\/p>\n<p>V\u1ec1 \u0111\u1ed9 m\u1ea1nh t\u1eeb, nam ch\u00e2m samarium cobalt th\u01b0\u1eddng c\u00f3 s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a (BHmax) dao \u0111\u1ed9ng t\u1eeb <strong>16 \u0111\u1ebfn 30 MGOe<\/strong>, m\u1ea1nh nh\u01b0ng th\u01b0\u1eddng th\u1ea5p h\u01a1n nam ch\u00e2m neodymium. \u0110i\u1ec3m \u0111\u1eb7c bi\u1ec7t c\u1ee7a SmCo l\u00e0 kh\u1ea3 n\u0103ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t xu\u1ea5t s\u1eafc \u2014 ch\u00fang c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00ean t\u1edbi <strong>350\u00b0C (662\u00b0F)<\/strong> m\u00e0 kh\u00f4ng m\u1ea5t nhi\u1ec1u t\u1eeb t\u00ednh.<\/p>\n<p>Nam ch\u00e2m samarium cobalt c\u0169ng n\u1ed5i b\u1eadt v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 oxy h\u00f3a. Kh\u00f4ng gi\u1ed1ng nh\u01b0 nam ch\u00e2m neodymium, ch\u00fang kh\u00f4ng c\u1ea7n l\u1edbp ph\u1ee7 \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ch\u1ed1ng r\u1ec9 s\u00e9t, ph\u00f9 h\u1ee3p cho m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t ho\u1eb7c ngo\u00e0i tr\u1eddi. V\u1ec1 m\u1eb7t c\u01a1 h\u1ecdc, c\u00e1c nam ch\u00e2m n\u00e0y d\u1ec5 v\u1ee1 v\u00e0 c\u00f3 th\u1ec3 b\u1ecb s\u1ee9t m\u1ebb ho\u1eb7c n\u1ee9t n\u1ebfu x\u1eed l\u00fd kh\u00f4ng c\u1ea9n th\u1eadn, do \u0111\u00f3 vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ea3o v\u1ec7 c\u1ea9n th\u1eadn l\u00e0 r\u1ea5t quan tr\u1ecdng.<\/p>\n<p><strong>\u0110i\u1ec3m n\u1ed5i b\u1eadt ch\u00ednh c\u1ee7a nam ch\u00e2m Samarium Cobalt:<\/strong><\/p>\n<ul>\n<li>Th\u00e0nh ph\u1ea7n: Samarium, coban v\u00e0 c\u00e1c nguy\u00ean t\u1ed1 ph\u1ee5 nh\u1ecf kh\u00e1c<\/li>\n<li>S\u1ea3n xu\u1ea5t: C\u00f4ng ngh\u1ec7 luy\u1ec7n kim b\u1ed9t, \u00e9p v\u00e0 nung k\u1ebft<\/li>\n<li>BHmax \u0111i\u1ec3n h\u00ecnh: 16\u201330 MGOe<\/li>\n<li>S\u1eed d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao: L\u00ean \u0111\u1ebfn 350\u00b0C<\/li>\n<li>Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n: Cao, kh\u00f4ng c\u1ea7n ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7<\/li>\n<li>T\u00ednh ch\u1ea5t c\u01a1 h\u1ecdc: Gi\u00f2n, c\u1ea7n x\u1eed l\u00fd c\u1ea9n th\u1eadn<\/li>\n<\/ul>\n<p>Nam ch\u00e2m SmCo r\u1ea5t ph\u00f9 h\u1ee3p khi b\u1ea1n c\u1ea7n s\u1ee9c m\u1ea1nh t\u1ed1t k\u1ebft h\u1ee3p v\u1edbi s\u1ef1 \u1ed5n \u0111\u1ecbnh trong \u0111i\u1ec1u ki\u1ec7n nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111oan v\u00e0 m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n.<\/p>\n<h2>T\u1ed5ng quan v\u1ec1 nam ch\u00e2m Neodymium NdFeB<\/h2>\n<p>Nam ch\u00e2m neodymium, c\u00f2n g\u1ecdi l\u00e0 nam ch\u00e2m NdFeB, ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb neodymium, s\u1eaft v\u00e0 boron. Ch\u00fang n\u1ed5i ti\u1ebfng v\u1edbi s\u1ee9c m\u1ea1nh t\u1eeb t\u00ednh cao nh\u1ea5t trong c\u00e1c lo\u1ea1i nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm th\u01b0\u01a1ng m\u1ea1i, th\u01b0\u1eddng c\u00f3 s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a (BHmax) v\u01b0\u1ee3t tr\u1ed9i so v\u1edbi nam ch\u00e2m samarium cobalt. \u0110i\u1ec1u n\u00e0y l\u00e0m cho nam ch\u00e2m NdFeB tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u khi b\u1ea1n c\u1ea7n tr\u01b0\u1eddng t\u1eeb m\u1ea1nh nh\u1ea5t trong k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn.<\/p>\n<p>Tuy nhi\u00ean, s\u1ee9c m\u1ea1nh cao c\u1ee7a ch\u00fang c\u0169ng \u0111i k\u00e8m v\u1edbi m\u1ed9t s\u1ed1 nh\u01b0\u1ee3c \u0111i\u1ec3m. Nam ch\u00e2m NdFeB c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t th\u1ea5p h\u01a1n so v\u1edbi samarium cobalt v\u00e0 c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u m\u1ea5t t\u1eeb t\u00ednh khi ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 tr\u00ean kho\u1ea3ng 80 \u0111\u1ebfn 150\u00b0C. Ch\u00fang c\u0169ng d\u1ec5 b\u1ecb kh\u1eed t\u1eeb n\u1ebfu b\u1ecb qu\u00e1 nhi\u1ec7t ho\u1eb7c ch\u1ecbu t\u00e1c \u0111\u1ed9ng t\u1eeb tr\u01b0\u1eddng \u0111\u1ed1i ngh\u1ecbch m\u1ea1nh.<\/p>\n<p>M\u1ed9t y\u1ebfu t\u1ed1 kh\u00e1c l\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. Kh\u00e1c v\u1edbi nam ch\u00e2m SmCo, nam ch\u00e2m neodymium d\u1ec5 b\u1ecb oxy h\u00f3a v\u00e0 c\u1ea7n l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 nh\u01b0 niken, k\u1ebdm ho\u1eb7c epoxy \u0111\u1ec3 ng\u0103n r\u1ec9 s\u00e9t, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c ngo\u00e0i tr\u1eddi.<\/p>\n<p>V\u1ec1 m\u1eb7t c\u01a1 h\u1ecdc, nam ch\u00e2m NdFeB gi\u00f2n v\u00e0 c\u00f3 th\u1ec3 b\u1ecb m\u1ebb ho\u1eb7c n\u1ee9t n\u1ebfu x\u1eed l\u00fd th\u00f4 b\u1ea1o, v\u00ec v\u1eady thi\u1ebft k\u1ebf v\u00e0 l\u1eafp \u0111\u1eb7t c\u1ea9n th\u1eadn r\u1ea5t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 \u00e1p l\u1ef1c c\u01a1 h\u1ecdc.<\/p>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin chi ti\u1ebft v\u1ec1 c\u00e1ch nam ch\u00e2m neodymium so s\u00e1nh v\u1edbi c\u00e1c lo\u1ea1i kh\u00e1c, h\u00e3y xem <span style=\"color: #ff6600;\"><strong><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/neodymium-magnets-vs-ceramic-magnets\/\" target=\"_blank\" rel=\"noopener\">nam ch\u00e2m neodymium so v\u1edbi nam ch\u00e2m ceramic<\/a> <\/strong><\/span>b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i.<\/p>\n<h2>So s\u00e1nh tr\u1ef1c ti\u1ebfp v\u1ec1 s\u1ee9c m\u1ea1nh Nam ch\u00e2m Samarium Cobalt c\u00f3 m\u1ea1nh h\u01a1n kh\u00f4ng<\/h2>\n<p>Khi so s\u00e1nh <strong>nam ch\u00e2m samarium cobalt<\/strong> v\u00e0 <strong>nam ch\u00e2m neodymium<\/strong>, th\u01b0\u1edbc \u0111o ch\u00ednh c\u1ee7a s\u1ee9c m\u1ea1nh l\u00e0 s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a, hay <strong>BHmax<\/strong>. \u0110i\u1ec1u n\u00e0y cho bi\u1ebft l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng t\u1eeb m\u00e0 nam ch\u00e2m c\u00f3 th\u1ec3 l\u01b0u tr\u1eef v\u00e0 cung c\u1ea5p.<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i nam ch\u00e2m<\/th>\n<th>BHmax \u0111i\u1ec3n h\u00ecnh (MGOe)<\/th>\n<th>\u0110\u1ed9 c\u01b0\u1ee1ng t\u1eeb (Kh\u00e1ng t\u1eeb m\u1ea5t t\u1eeb)<\/th>\n<th>\u1ed4n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Nam Ch\u00e2m Cobalt Samarium<\/td>\n<td>20 &#8211; 30<\/td>\n<td>R\u1ea5t cao<\/td>\n<td>\u1ed4n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn 300\u00b0C ho\u1eb7c h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>Nam ch\u00e2m Neodymium (NdFeB)<\/td>\n<td>30 &#8211; 52<\/td>\n<td>Cao (nh\u01b0ng th\u1ea5p h\u01a1n SmCo v\u1ec1 nhi\u1ec7t)<\/td>\n<td>\u1ed4n \u0111\u1ecbnh \u0111\u1ebfn 80-150\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Nam ch\u00e2m Neodymium<\/strong> th\u01b0\u1eddng c\u00f3 BHmax cao h\u01a1n, ngh\u0129a l\u00e0 ch\u00fang th\u01b0\u1eddng m\u1ea1nh h\u01a1n v\u1ec1 l\u1ef1c t\u1eeb nguy\u00ean th\u1ee7y. Nh\u01b0ng <strong>nam ch\u00e2m samarium cobalt (SmCo)<\/strong> gi\u1eef l\u1ee3i th\u1ebf v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb (\u0111\u1ed9 c\u1ee9ng t\u1eeb), \u0111\u1eb7c bi\u1ec7t \u1edf nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n.<\/p>\n<h3>\u0110\u1ed9 c\u1ee9ng t\u1eeb v\u00e0 m\u1ea5t t\u1eeb<\/h3>\n<ul>\n<li>Nam ch\u00e2m SmCo duy tr\u00ec \u0111\u1ed9 c\u1ee9ng t\u1eeb t\u1ed1t h\u01a1n khi b\u1ecb nung n\u00f3ng.<\/li>\n<li>Nam ch\u00e2m NdFeB c\u00f3 th\u1ec3 m\u1ea5t t\u1eeb nhanh h\u01a1n khi ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t ho\u1eb7c t\u1eeb tr\u01b0\u1eddng m\u1ea1nh.<\/li>\n<\/ul>\n<h3>\u1ed4n \u0111\u1ecbnh \u1edf nhi\u1ec7t \u0111\u1ed9 cao<\/h3>\n<ul>\n<li>Nam ch\u00e2m SmCo gi\u1eef \u0111\u01b0\u1ee3c s\u1ee9c m\u1ea1nh t\u1eeb c\u1ee7a ch\u00fang \u1edf nhi\u1ec7t \u0111\u1ed9 l\u00ean \u0111\u1ebfn 300\u00b0C.<\/li>\n<li>Nam ch\u00e2m NdFeB b\u1eaft \u0111\u1ea7u y\u1ebfu \u0111i \u1edf nhi\u1ec7t \u0111\u1ed9 tr\u00ean 80-150\u00b0C, t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i v\u00e0 l\u1edbp ph\u1ee7.<\/li>\n<\/ul>\n<h3>Hi\u1ec7u su\u1ea5t th\u1ef1c t\u1ebf<\/h3>\n<ul>\n<li>SmCo \u0111\u01b0\u1ee3c \u01b0u ti\u00ean trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, qu\u00e2n s\u1ef1, v\u00e0 \u0111\u1ed9ng c\u01a1 nhi\u1ec7t \u0111\u1ed9 cao, n\u01a1i kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec7t v\u00e0 \u0103n m\u00f2n quan tr\u1ecdng h\u01a1n s\u1ee9c m\u1ea1nh tuy\u1ec7t \u0111\u1ed1i.<\/li>\n<li>NdFeB chi\u1ebfn th\u1eafng khi \u01b0u ti\u00ean t\u1ed1i \u0111a v\u1ec1 s\u1ee9c m\u1ea1nh t\u1eeb, nh\u01b0 trong \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng ho\u1eb7c \u0111\u1ed9ng c\u01a1 nh\u1ecf g\u1ecdn ho\u1ea1t \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh.<\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, <strong>nam ch\u00e2m samarium cobalt kh\u00f4ng nh\u1ea5t thi\u1ebft m\u1ea1nh h\u01a1n nam ch\u00e2m neodymium v\u1ec1 s\u1ee9c m\u1ea1nh nguy\u00ean th\u1ee7y<\/strong>, nh\u01b0ng ch\u00fang v\u01b0\u1ee3t tr\u1ed9i h\u01a1n nam ch\u00e2m NdFeB v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng nhi\u1ec7t v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i d\u01b0\u1edbi \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/p>\n<h2>C\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u1ef1a ch\u1ecdn nam ch\u00e2m<\/h2>\n<p>Khi ch\u1ecdn gi\u1eefa nam ch\u00e2m samarium cobalt (SmCo) v\u00e0 nam ch\u00e2m neodymium (NdFeB), s\u1ee9c m\u1ea1nh kh\u00f4ng ph\u1ea3i l\u00e0 y\u1ebfu t\u1ed1 duy nh\u1ea5t c\u1ea7n xem x\u00e9t. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 ch\u00ednh th\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn quy\u1ebft \u0111\u1ecbnh:<\/p>\n<p><strong>Chi ph\u00ed v\u00e0 kh\u1ea3 n\u0103ng cung c\u1ea5p<\/strong><\/p>\n<ul>\n<li>Nam ch\u00e2m neodymium th\u01b0\u1eddng c\u00f3 gi\u00e1 th\u00e0nh h\u1ee3p l\u00fd h\u01a1n v\u00e0 ph\u1ed5 bi\u1ebfn r\u1ed9ng r\u00e3i, khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho s\u1ea3n xu\u1ea5t quy m\u00f4 l\u1edbn.<\/li>\n<li>Nam ch\u00e2m samari-cobalt \u0111\u1eaft h\u01a1n do nguy\u00ean li\u1ec7u hi\u1ebfm v\u00e0 quy tr\u00ecnh s\u1ea3n xu\u1ea5t ph\u1ee9c t\u1ea1p nh\u01b0ng mang l\u1ea1i l\u1ee3i \u00edch \u0111\u1eb7c bi\u1ec7t.<\/li>\n<\/ul>\n<p><strong>\u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng<\/strong><\/p>\n<ul>\n<li>Nam ch\u00e2m samari-cobalt n\u1ed5i b\u1eadt trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t\u2014ch\u00fang ch\u1ed1ng \u0103n m\u00f2n v\u00e0 ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao l\u00ean t\u1edbi 300\u00b0C m\u00e0 kh\u00f4ng m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng.<\/li>\n<li>Nam ch\u00e2m NdFeB ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t \u1edf nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh nh\u01b0ng c\u1ea7n l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 v\u00ec d\u1ec5 b\u1ecb \u0103n m\u00f2n v\u00e0 y\u1ebfu \u0111i khi tr\u00ean 80-150\u00b0C.<\/li>\n<\/ul>\n<p><strong>Nhu c\u1ea7u \u1ee8ng d\u1ee5ng<\/strong><\/p>\n<ul>\n<li>\u0110\u1ed1i v\u1edbi \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn, thi\u1ebft b\u1ecb y t\u1ebf v\u00e0 linh ki\u1ec7n h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5, m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a nam ch\u00e2m r\u1ea5t quan tr\u1ecdng.<\/li>\n<li>SmCo l\u00fd t\u01b0\u1edfng \u1edf nh\u1eefng n\u01a1i c\u1ea7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao, nh\u01b0 h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 ho\u1eb7c c\u1ea3m bi\u1ebfn nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n<li>NdFeB ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng t\u1ed1i \u0111a v\u1edbi chi ph\u00ed th\u1ea5p h\u01a1n, nh\u01b0 \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n ho\u1eb7c \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng.<\/li>\n<\/ul>\n<p><strong>Tu\u1ed5i th\u1ecd v\u00e0 \u0111\u1ed9 tin c\u1eady<\/strong><\/p>\n<ul>\n<li>Nam ch\u00e2m samari-cobalt duy tr\u00ec s\u1ee9c m\u1ea1nh t\u1eeb v\u00e0 t\u00ednh to\u00e0n v\u1eb9n v\u1eadt l\u00fd l\u00e2u h\u01a1n trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/li>\n<li>Nam ch\u00e2m NdFeB c\u00f3 th\u1ec3 suy gi\u1ea3m theo th\u1eddi gian n\u1ebfu ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t ho\u1eb7c \u0111\u1ed9 \u1ea9m m\u00e0 kh\u00f4ng c\u00f3 l\u1edbp ph\u1ee7 ho\u1eb7c thi\u1ebft k\u1ebf ph\u00f9 h\u1ee3p.<\/li>\n<\/ul>\n<p>C\u00e1c y\u1ebfu t\u1ed1 n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn l\u1ef1a ch\u1ecdn c\u1ee7a b\u1ea1n c\u0169ng nh\u01b0 s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng ban \u0111\u1ea7u. Xem x\u00e9t c\u00e1ch v\u00e0 n\u01a1i nam ch\u00e2m s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng gi\u00fap \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1t nh\u1ea5t theo th\u1eddi gian. \u0110\u1ec3 c\u00f3 c\u00e1i nh\u00ecn chi ti\u1ebft v\u1ec1 c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o h\u01b0\u1edbng d\u1eabn c\u1ee7a NBAEM v\u1ec1 c\u00e1c lo\u1ea1i nam ch\u00e2m v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng kh\u00e1c nhau.<\/p>\n<h2>Khi n\u00e0o n\u00ean ch\u1ecdn nam ch\u00e2m samari-cobalt thay v\u00ec neodymium<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/Samarium_Cobalt_Magnets_High_Temp_Use_P5xP6RjAI.webp\" alt=\"Nam ch\u00e2m Samarium Cobalt s\u1eed d\u1ee5ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao\" \/><\/p>\n<p>Nam ch\u00e2m samari-cobalt (SmCo) th\u1ef1c s\u1ef1 n\u1ed5i b\u1eadt trong nh\u1eefng t\u00ecnh hu\u1ed1ng \u0111\u1eb7c bi\u1ec7t m\u00e0 nam ch\u00e2m neodymium (NdFeB) kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 khi b\u1ea1n n\u00ean ch\u1ecdn SmCo thay v\u00ec NdFeB:<\/p>\n<ul>\n<li>\n<h3>S\u1eed d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao tr\u00ean 150\u00b0C<\/h3>\n<p>Nam ch\u00e2m SmCo duy tr\u00ec hi\u1ec7u su\u1ea5t t\u1eeb tr\u01b0\u1eddng m\u1ea1nh \u1edf nhi\u1ec7t \u0111\u1ed9 m\u00e0 nam ch\u00e2m NdFeB b\u1eaft \u0111\u1ea7u y\u1ebfu \u0111i ho\u1eb7c m\u1ea5t t\u1eeb t\u00ednh.<\/li>\n<li>\n<h3>Ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i m\u00e0 kh\u00f4ng c\u1ea7n l\u1edbp ph\u1ee7<\/h3>\n<p>Kh\u00e1c v\u1edbi nam ch\u00e2m neodymium, c\u1ea7n l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 \u0111\u1ec3 tr\u00e1nh r\u1ec9 s\u00e9t, nam ch\u00e2m SmCo t\u1ef1 nhi\u00ean ch\u1ed1ng \u0103n m\u00f2n v\u00e0 oxy h\u00f3a, l\u00fd t\u01b0\u1edfng cho m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t ho\u1eb7c \u1ea9m \u01b0\u1edbt.<\/li>\n<li>\n<h3>\u0110\u1ed9 \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u00e0 t\u1eeb tr\u01b0\u1eddng l\u00e2u d\u00e0i<\/h3>\n<p>Nam ch\u00e2m SmCo gi\u1eef h\u00ecnh d\u1ea1ng v\u00e0 s\u1ee9c m\u1ea1nh t\u1eeb l\u00e2u h\u01a1n so v\u1edbi NdFeB, \u0111\u1eb7c bi\u1ec7t d\u01b0\u1edbi chu k\u1ef3 nhi\u1ec7t ho\u1eb7c \u0111i\u1ec1u ki\u1ec7n c\u0103ng th\u1eb3ng.<\/li>\n<\/ul>\n<h3>C\u00e1c \u1ee9ng d\u1ee5ng t\u1eeb danh m\u1ee5c c\u1ee7a NBAEM<\/h3>\n<ul>\n<li>C\u00e1c linh ki\u1ec7n h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao<\/li>\n<li>\u0110\u1ed9ng c\u01a1 v\u00e0 m\u00e1y ph\u00e1t ho\u1ea1t \u0111\u1ed9ng trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao<\/li>\n<li>C\u1ea3m bi\u1ebfn trong m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n ho\u1eb7c ngo\u00e0i tr\u1eddi m\u00e0 kh\u00f4ng c\u1ea7n l\u1edbp ph\u1ee7 b\u1ed5 sung<\/li>\n<li>Thi\u1ebft b\u1ecb y t\u1ebf b\u1ec1n b\u1ec9 y\u00eau c\u1ea7u tr\u01b0\u1eddng t\u1eeb \u1ed5n \u0111\u1ecbnh trong th\u1eddi gian d\u00e0i<\/li>\n<\/ul>\n<p>Ch\u1ecdn samarium cobalt h\u1ee3p l\u00fd khi b\u1ea1n c\u1ea7n nam ch\u00e2m \u0111\u00e1ng tin c\u1eady s\u1eb5n s\u00e0ng ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t m\u00e0 kh\u00f4ng c\u1ea7n b\u1ea3o tr\u00ec th\u00eam ho\u1eb7c r\u1ee7i ro h\u1ecfng h\u00f3c.<\/p>\n<h2>Khi n\u00e0o n\u00ean ch\u1ecdn Neodymium h\u01a1n Samarium Cobalt<\/h2>\n<p>Nam ch\u00e2m Neodymium (NdFeB) n\u1ed5i b\u1eadt khi b\u1ea1n c\u1ea7n <strong>\u0111\u1ed9 m\u1ea1nh t\u1eeb t\u1ed1i \u0111a \u1edf nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh<\/strong>\u2014th\u01b0\u1eddng d\u01b0\u1edbi 150\u00b0C. N\u1ebfu d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n y\u00eau c\u1ea7u tr\u01b0\u1eddng m\u1ea1nh nh\u1ea5t cho c\u00e1c b\u1ed9 ph\u1eadn nh\u1ecf g\u1ecdn ho\u1eb7c thi\u1ebft k\u1ebf nh\u1eb9, NdFeB th\u01b0\u1eddng l\u00e0 l\u1ef1a ch\u1ecdn h\u00e0ng \u0111\u1ea7u.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng l\u00fd do ch\u00ednh \u0111\u1ec3 ch\u1ecdn neodymium h\u01a1n samarium cobalt:<\/p>\n<ul>\n<li>\n<h3>S\u1ee9c m\u1ea1nh t\u1eeb cao h\u01a1n<\/h3>\n<p>Nam ch\u00e2m NdFeB th\u01b0\u1eddng c\u00f3 s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a (BHmax) cao h\u01a1n SmCo, c\u00f3 ngh\u0129a l\u00e0 l\u1ef1c t\u1eeb m\u1ea1nh h\u01a1n trong k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n.<\/li>\n<li>\n<h3>Hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed<\/h3>\n<p>Nam ch\u00e2m neodymium c\u00f3 gi\u00e1 th\u00e0nh ph\u1ea3i ch\u0103ng h\u01a1n samarium cobalt, l\u00fd t\u01b0\u1edfng cho <strong>d\u1ef1 \u00e1n ti\u1ebft ki\u1ec7m ng\u00e2n s\u00e1ch<\/strong> ho\u1eb7c c\u00e1c l\u00f4 s\u1ea3n xu\u1ea5t quy m\u00f4 l\u1edbn.<\/li>\n<li>\n<h3>\u0110\u1ecbnh h\u00ecnh v\u00e0 L\u1edbp ph\u1ee7<\/h3>\n<p>Nam ch\u00e2m NdFeB c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng \u0111\u1ecbnh h\u00ecnh v\u00e0 ph\u1ee7 l\u1edbp (nh\u01b0 nickel ho\u1eb7c epoxy) \u0111\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n. T\u00ednh linh ho\u1ea1t n\u00e0y r\u1ea5t ph\u00f9 h\u1ee3p cho <strong>s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t v\u00e0 c\u00e1c b\u1ed9 ph\u1eadn t\u00f9y ch\u1ec9nh<\/strong>.<\/li>\n<li>\n<h3>S\u1ea3n xu\u1ea5t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn<\/h3>\n<p>Chi ph\u00ed th\u1ea5p h\u01a1n v\u00e0 t\u00ednh linh ho\u1ea1t khi\u1ebfn nam ch\u00e2m neodymium tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho c\u00e1c ng\u00e0nh c\u1ea7n <strong>s\u1ed1 l\u01b0\u1ee3ng l\u1edbn<\/strong>\u2014nh\u01b0 \u0111\u1ed9ng c\u01a1 \u00f4 t\u00f4, \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng v\u00e0 c\u1ea3m bi\u1ebfn.<\/li>\n<\/ul>\n<h3>V\u00ed d\u1ee5 th\u00e0nh c\u00f4ng c\u1ee7a kh\u00e1ch h\u00e0ng NBAEM<\/h3>\n<ul>\n<li>\n<h3>\u0110\u1ed9ng c\u01a1 xe \u0111i\u1ec7n<\/h3>\n<p>Nam ch\u00e2m NdFeB cung c\u1ea5p m\u1eadt \u0111\u1ed9 n\u0103ng l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft cho c\u00e1c \u0111\u1ed9ng c\u01a1 hi\u1ec7u su\u1ea5t cao v\u1edbi chi ph\u00ed h\u1ee3p l\u00fd.<\/li>\n<li>\n<h3>Thi\u1ebft b\u1ecb loa v\u00e0 \u00e2m thanh<\/h3>\n<p>Kh\u00e1ch h\u00e0ng d\u1ef1a v\u00e0o NdFeB \u0111\u1ec3 c\u00f3 nam ch\u00e2m nh\u1ecf g\u1ecdn, m\u1ea1nh m\u1ebd gi\u00fap c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng \u00e2m thanh m\u00e0 kh\u00f4ng l\u00e0m t\u0103ng k\u00edch th\u01b0\u1edbc.<\/li>\n<li>\n<h3>C\u1ea3m bi\u1ebfn c\u00f4ng nghi\u1ec7p<\/h3>\n<p>C\u00e1c \u0111\u01a1n h\u00e0ng l\u1edbn h\u01a1n v\u1edbi h\u00ecnh d\u1ea1ng t\u00f9y ch\u1ec9nh t\u1eadn d\u1ee5ng l\u1ee3i th\u1ebf c\u1ee7a NdFeB trong vi\u1ec7c d\u1ec5 d\u00e0ng ph\u1ee7 l\u1edbp v\u00e0 gia c\u00f4ng.<\/li>\n<\/ul>\n<p>N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh v\u00e0 y\u00eau c\u1ea7u \u0111\u1ed9 m\u1ea1nh t\u1eeb tr\u01b0\u1eddng cao nh\u1ea5t v\u1edbi hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed, nam ch\u00e2m neodymium t\u1eeb NBAEM l\u00e0 l\u1ef1a ch\u1ecdn th\u00f4ng minh.<\/p>\n<h2>v\u00e0 Khuy\u1ebfn ngh\u1ecb<\/h2>\n<p>Khi n\u00f3i \u0111\u1ebfn \u0111\u1ed9 m\u1ea1nh, nam ch\u00e2m neodymium (NdFeB) th\u01b0\u1eddng d\u1eabn \u0111\u1ea7u v\u1edbi s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng cao h\u01a1n. Tuy nhi\u00ean, ch\u00fang c\u00f3 xu h\u01b0\u1edbng m\u1ea5t \u1ed5n \u0111\u1ecbnh d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao v\u00e0 \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t. Ng\u01b0\u1ee3c l\u1ea1i, nam ch\u00e2m samarium cobalt (SmCo) cung c\u1ea5p s\u1ee9c m\u1ea1nh tuy\u1ec7t v\u1eddi trong m\u00f4i tr\u01b0\u1eddng kh\u00f3 kh\u0103n, duy tr\u00ec \u0111\u1eb7c t\u00ednh t\u1eeb t\u1ed1t ngay c\u1ea3 \u1edf nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 ch\u1ed1ng \u0103n m\u00f2n m\u00e0 kh\u00f4ng c\u1ea7n l\u1edbp ph\u1ee7 b\u1ed5 sung.<\/p>\n<p>L\u1ef1a ch\u1ecdn lo\u1ea1i nam ch\u00e2m ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n:<\/p>\n<ul>\n<li><strong>Ch\u1ecdn nam ch\u00e2m NdFeB<\/strong> n\u1ebfu \u01b0u ti\u00ean c\u1ee7a b\u1ea1n l\u00e0 \u0111\u1ed9 m\u1ea1nh t\u1eeb tr\u01b0\u1eddng t\u1ed1i \u0111a \u1edf nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed, \u0111\u1eb7c bi\u1ec7t cho s\u1ea3n xu\u1ea5t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn.<\/li>\n<li><strong>Ch\u1ecdn nam ch\u00e2m SmCo<\/strong> n\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 cao (tr\u00ean 150\u00b0C), ti\u1ebfp x\u00fac v\u1edbi m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n ho\u1eb7c y\u00eau c\u1ea7u \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh t\u1eeb v\u00e0 k\u00edch th\u01b0\u1edbc l\u00e2u d\u00e0i.<\/li>\n<\/ul>\n<p>\u0110\u1ec3 \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn chuy\u00ean nghi\u1ec7p ph\u00f9 h\u1ee3p v\u1edbi d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n v\u00e0 truy c\u1eadp v\u00e0o c\u00e1c lo\u1ea1i nam ch\u00e2m ch\u1ea5t l\u01b0\u1ee3ng cao, h\u00e3y li\u00ean h\u1ec7 v\u1edbi c\u00e1c chuy\u00ean gia c\u1ee7a NBAEM. H\u1ecd c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n quy\u1ebft \u0111\u1ecbnh lo\u1ea1i nam ch\u00e2m ph\u00f9 h\u1ee3p nh\u1ea5t v\u1edbi y\u00eau c\u1ea7u \u0111\u1eb7c bi\u1ec7t c\u1ee7a b\u1ea1n v\u00e0 \u0111\u1ea3m b\u1ea3o b\u1ea1n nh\u1eadn \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u \u0111\u00e1ng tin c\u1eady, hi\u1ec7u su\u1ea5t cao.<\/p>\n<p>Kh\u00e1m ph\u00e1 th\u00eam v\u1ec1 c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 lo\u1ea1i nam ch\u00e2m tr\u00ean NBAEM \u0111\u1ec3 \u0111\u01b0a ra l\u1ef1a ch\u1ecdn s\u00e1ng su\u1ed1t nh\u1ea5t cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 nam ch\u00e2m samarium cobalt v\u00e0 neodymium<\/h2>\n<h3>Nam ch\u00e2m samarium cobalt c\u00f3 ph\u00f9 h\u1ee3p \u0111\u1ec3 s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t kh\u00f4ng<\/h3>\n<p>C\u00f3, nam ch\u00e2m samarium cobalt (SmCo) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t, nh\u01b0ng ch\u00fang th\u01b0\u1eddng \u0111\u1eaft h\u01a1n v\u00e0 d\u1ec5 v\u1ee1 h\u01a1n so v\u1edbi nam ch\u00e2m neodymium. Qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u00f2i h\u1ecfi x\u1eed l\u00fd c\u1ea9n th\u1eadn do t\u00ednh d\u1ec5 v\u1ee1 c\u1ee7a ch\u00fang, l\u00e0m cho qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t ch\u1eadm h\u01a1n v\u00e0 t\u1ed1n k\u00e9m h\u01a1n. \u0110\u1ed1i v\u1edbi c\u00e1c d\u1ef1 \u00e1n s\u1ed1 l\u01b0\u1ee3ng l\u1edbn m\u00e0 chi ph\u00ed l\u00e0 m\u1ed1i quan t\u00e2m, nam ch\u00e2m NdFeB th\u01b0\u1eddng ph\u00f9 h\u1ee3p h\u01a1n.<\/p>\n<h3>Nam ch\u00e2m neodymium c\u00f3 th\u1ec3 ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n hi\u1ec7n nay nh\u1edd l\u1edbp ph\u1ee7 m\u1edbi<\/h3>\n<p>L\u1edbp ph\u1ee7 m\u1edbi v\u00e0 c\u00e1c l\u1edbp b\u1ea3o v\u1ec7 \u0111\u00e3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n c\u1ee7a nam ch\u00e2m neodymium (NdFeB), nh\u01b0ng gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a l\u00f5i nam ch\u00e2m v\u1eabn kh\u00f4ng thay \u0111\u1ed5i nhi\u1ec1u. Trong khi l\u1edbp ph\u1ee7 gi\u00fap b\u1ea3o v\u1ec7 kh\u1ecfi r\u1ec9 s\u00e9t v\u00e0 nhi\u1ec7t \u0111\u1ed9 nh\u1ecf, nam ch\u00e2m NdFeB v\u1eabn ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t \u1edf nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh (th\u01b0\u1eddng d\u01b0\u1edbi 150\u00b0C). \u0110\u1ed1i v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n, samarium cobalt v\u1eabn l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t h\u01a1n.<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 tu\u1ed5i th\u1ecd l\u00e0 g\u00ec<\/h3>\n<p>Nam ch\u00e2m SmCo th\u01b0\u1eddng c\u00f3 tu\u1ed5i th\u1ecd l\u00e2u h\u01a1n trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t nh\u1edd kh\u1ea3 n\u0103ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i. Nam ch\u00e2m NdFeB c\u00f3 th\u1ec3 gi\u1ea3m hi\u1ec7u su\u1ea5t nhanh h\u01a1n khi ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t, \u0111\u1ed9 \u1ea9m ho\u1eb7c m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n tr\u1eeb khi \u0111\u01b0\u1ee3c ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7 t\u1ed1t. V\u1edbi s\u1ef1 ch\u0103m s\u00f3c \u0111\u00fang c\u00e1ch, c\u1ea3 hai lo\u1ea1i \u0111\u1ec1u c\u00f3 th\u1ec3 k\u00e9o d\u00e0i nhi\u1ec1u n\u0103m, nh\u01b0ng nam ch\u00e2m SmCo th\u01b0\u1eddng cung c\u1ea5p hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh l\u00e2u d\u00e0i h\u01a1n.<\/p>\n<h3>Nam ch\u00e2m NdFeB v\u00e0 SmCo so s\u00e1nh v\u1ec1 \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a tr\u01b0\u1eddng t\u1eeb<\/h3>\n<p>Nam ch\u00e2m samarium cobalt duy tr\u00ec tr\u01b0\u1eddng t\u1eeb \u1ed5n \u0111\u1ecbnh h\u01a1n trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 r\u1ed9ng h\u01a1n v\u00e0 ch\u1ed1ng m\u1ea5t t\u1eeb t\u1ed1t h\u01a1n so v\u1edbi nam ch\u00e2m neodymium. Nam ch\u00e2m NdFeB c\u00f3 tr\u01b0\u1eddng t\u1eeb ban \u0111\u1ea7u m\u1ea1nh h\u01a1n nh\u01b0ng c\u00f3 th\u1ec3 m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh nhanh h\u01a1n n\u1ebfu ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t ho\u1eb7c \u00e1p l\u1ef1c v\u1eadt l\u00fd. Trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u hi\u1ec7u su\u1ea5t t\u1eeb \u1ed5n \u0111\u1ecbnh, th\u01b0\u1eddng \u01b0u ti\u00ean s\u1eed d\u1ee5ng SmCo.<\/p>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 xem nam ch\u00e2m samarium cobalt c\u00f3 m\u1ea1nh h\u01a1n neodymium hay kh\u00f4ng qua so s\u00e1nh chuy\u00ean gia v\u1ec1 \u0111\u1ed9 m\u1ea1nh, kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 \u0111\u1ed9 b\u1ec1n.<\/p>","protected":false},"author":1,"featured_media":3073,"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-3078","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/09\/Samarium_Cobalt_Magnets_Properties_and_Performance.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3078","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=3078"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3078\/revisions"}],"predecessor-version":[{"id":3080,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/3078\/revisions\/3080"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/3073"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=3078"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=3078"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=3078"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}