{"id":1768,"date":"2025-08-06T03:52:49","date_gmt":"2025-08-06T03:52:49","guid":{"rendered":"https:\/\/nbaem.com\/?p=1768"},"modified":"2025-08-06T07:39:55","modified_gmt":"2025-08-06T07:39:55","slug":"maximum-operating-temperature-vs-curie-temperature","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/maximum-operating-temperature-vs-curie-temperature\/","title":{"rendered":"Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a so v\u1edbi Nhi\u1ec7t \u0111\u1ed9 Curie c\u1ee7a nam ch\u00e2m gi\u1ea3i th\u00edch nh\u01b0 th\u1ebf n\u00e0o"},"content":{"rendered":"<div class=\"post-single\">\n<div class=\"post-content\">\n<p>B\u1ea1n \u0111ang c\u1ed1 g\u1eafng hi\u1ec3u s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa\u00a0<strong>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/strong>\u00a0v\u00e0\u00a0<strong>Nhi\u1ec7t \u0111\u1ed9 Curie<\/strong>\u00a0khi n\u00f3i \u0111\u1ebfn c\u00e1c v\u1eadt li\u1ec7u t\u1eeb t\u00ednh? B\u1ea1n kh\u00f4ng \u0111\u01a1n \u0111\u1ed9c. D\u00f9 b\u1ea1n l\u00e0 k\u1ef9 s\u01b0, ng\u01b0\u1eddi mua hay nh\u00e0 thi\u1ebft k\u1ebf l\u00e0m vi\u1ec7c v\u1edbi nam ch\u00e2m trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p nh\u01b0 \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn ho\u1eb7c \u0111i\u1ec7n t\u1eed, vi\u1ec7c bi\u1ebft c\u00e1c gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 n\u00e0y l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u01b0a ra nh\u1eefng l\u1ef1a ch\u1ecdn th\u00f4ng minh.<\/p>\n<p>T\u1ea1i sao? B\u1edfi v\u00ec nh\u1eefng nhi\u1ec7t \u0111\u1ed9 n\u00e0y \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u su\u1ea5t t\u1eeb, \u0111\u1ed9 tin c\u1eady v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a b\u1ea1n. \u0110\u1ea9y m\u1ed9t nam ch\u00e2m v\u01b0\u1ee3t qu\u00e1\u00a0<strong>nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/strong>, v\u00e0 b\u1ea1n c\u00f3 nguy c\u01a1 g\u00e2y h\u01b0 h\u1ecfng v\u0129nh vi\u1ec5n ho\u1eb7c gi\u1ea3m hi\u1ec7u qu\u1ea3. V\u01b0\u1ee3t qua\u00a0<strong>nhi\u1ec7t \u0111\u1ed9 Curie<\/strong>, v\u00e0 nam ch\u00e2m m\u1ea5t ho\u00e0n to\u00e0n \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a n\u00f3\u2014th\u01b0\u1eddng l\u00e0 kh\u00f4ng th\u1ec3 ph\u1ee5c h\u1ed3i.<\/p>\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y, b\u1ea1n s\u1ebd kh\u00e1m ph\u00e1 nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa hai m\u1ed1c nhi\u1ec7t \u0111\u1ed9 quan tr\u1ecdng n\u00e0y, c\u00e1ch ch\u00fang \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u t\u1eeb c\u1ee7a b\u1ea1n, v\u00e0 c\u00e1ch c\u00e1c nam ch\u00e2m ch\u1ea5t l\u01b0\u1ee3ng cao c\u1ee7a NBAEM \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nh\u1eefng y\u00eau c\u1ea7u nhi\u1ec7t \u0111\u1ed9 kh\u1eaft khe nh\u1ea5t c\u1ee7a b\u1ea1n. S\u1eb5n s\u00e0ng kh\u00e1m ph\u00e1 ch\u01b0a?<\/p>\n<h2>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a l\u00e0 g\u00ec<\/h2>\n<p>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a (MOT) l\u00e0 nhi\u1ec7t \u0111\u1ed9 cao nh\u1ea5t m\u00e0 m\u1ed9t v\u1eadt li\u1ec7u t\u1eeb c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady m\u00e0 kh\u00f4ng m\u1ea5t \u0111i \u0111\u00e1ng k\u1ec3 c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a n\u00f3. N\u00f3i c\u00e1ch kh\u00e1c, \u0111\u00f3 l\u00e0 gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 b\u1ea1n kh\u00f4ng n\u00ean v\u01b0\u1ee3t qu\u00e1 \u0111\u1ec3 gi\u1eef cho nam ch\u00e2m ho\u1ea1t \u0111\u1ed9ng t\u1ed1t theo th\u1eddi gian.<\/p>\n<p>Nhi\u1ec7t \u0111\u1ed9 n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi tu\u1ed5i th\u1ecd v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a s\u1ea3n ph\u1ea9m. Khi nam ch\u00e2m ho\u1ea1t \u0111\u1ed9ng \u1edf ho\u1eb7c d\u01b0\u1edbi MOT c\u1ee7a n\u00f3, n\u00f3 duy tr\u00ec \u0111\u01b0\u1ee3c \u0111\u1ed9 m\u1ea1nh, s\u1ef1 \u1ed5n \u0111\u1ecbnh v\u00e0 hi\u1ec7u su\u1ea5t. Nh\u01b0ng n\u1ebfu nhi\u1ec7t \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n n\u00e0y, nam ch\u00e2m c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u m\u1ea5t t\u1eeb t\u00ednh, d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 th\u1eadm ch\u00ed h\u01b0 h\u1ecfng v\u0129nh vi\u1ec5n.<\/p>\n<p>C\u00e1c gi\u00e1 tr\u1ecb MOT \u0111i\u1ec3n h\u00ecnh ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i v\u1eadt li\u1ec7u t\u1eeb:<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m Neodymium:<\/strong>\u00a0Th\u01b0\u1eddng c\u00f3 MOT t\u1eeb kho\u1ea3ng 80\u00b0C \u0111\u1ebfn 150\u00b0C, t\u00f9y thu\u1ed9c v\u00e0o c\u1ea5p v\u00e0 th\u00e0nh ph\u1ea7n.<\/li>\n<li><strong>Nam ch\u00e2m Ferrite:<\/strong>\u00a0Ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n, th\u01b0\u1eddng c\u00f3 MOT l\u00ean \u0111\u1ebfn 250\u00b0C \u0111\u1ebfn 300\u00b0C.<\/li>\n<li><strong>Nam ch\u00e2m Samarium-cobalt:<\/strong>\u00a0N\u1ed5i ti\u1ebfng v\u1edbi nhi\u1ec7t \u0111\u1ed9 MOT cao h\u01a1n, \u0111\u00f4i khi l\u00ean \u0111\u1ebfn 350\u00b0C.<\/li>\n<\/ul>\n<p>M\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a (MOT):<\/p>\n<ul>\n<li>Th\u00e0nh ph\u1ea7n v\u00e0 lo\u1ea1i v\u1eadt li\u1ec7u<\/li>\n<li>Ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t v\u00e0 l\u1edbp ph\u1ee7<\/li>\n<li>C\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng v\u00e0 \u0111i\u1ec1u ki\u1ec7n t\u1ea3i<\/li>\n<li>C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng nh\u01b0 \u0111\u1ed9 \u1ea9m v\u00e0 \u1ee9ng su\u1ea5t c\u01a1 h\u1ecdc<\/li>\n<\/ul>\n<p>V\u01b0\u1ee3t qu\u00e1 Nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a s\u1ebd d\u1eabn \u0111\u1ebfn suy gi\u1ea3m hi\u1ec7u su\u1ea5t d\u1ea7n d\u1ea7n. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0\u00a0<strong>\u0111\u1ed9 b\u1ec1n t\u1eeb t\u00ednh gi\u1ea3m<\/strong>, nam ch\u00e2m tr\u1edf n\u00ean kh\u00f4ng \u1ed5n \u0111\u1ecbnh v\u00e0 v\u00f2ng \u0111\u1eddi t\u1ed5ng th\u1ec3 c\u1ee7a n\u00f3 b\u1ecb r\u00fat ng\u1eafn. Thi\u1ec7t h\u1ea1i c\u00f3 th\u1ec3 kh\u00f4ng th\u1ec3 ph\u1ee5c h\u1ed3i n\u1ebfu nhi\u1ec7t \u0111\u1ed9 duy tr\u00ec cao trong th\u1eddi gian d\u00e0i, l\u00e0m gi\u1ea3m \u0111\u1ed9 tin c\u1eady v\u00e0 g\u00e2y ra nh\u1eefng h\u1ecfng h\u00f3c t\u1ed1n k\u00e9m trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn ho\u1eb7c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed.<\/p>\n<p>Hi\u1ec3u v\u1ec1 MOT gi\u00fap c\u00e1c k\u1ef9 s\u01b0 v\u00e0 ng\u01b0\u1eddi d\u00f9ng ch\u1ecdn \u0111\u00fang lo\u1ea1i nam ch\u00e2m v\u00e0 thi\u1ebft k\u1ebf qu\u1ea3n l\u00fd nhi\u1ec7t th\u00edch h\u1ee3p \u0111\u1ec3 tr\u00e1nh h\u1ecfng h\u00f3c trong \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng th\u1ef1c t\u1ebf.<\/p>\n<h2>Nhi\u1ec7t \u0111\u1ed9 Curie l\u00e0 g\u00ec<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/artseo.cn\/apis\/uploads\/20250806\/Curie_Temperature_and_Ferromagnetic_Phase_Transition_wWb.webp\" alt=\"Nhi\u1ec7t \u0111\u1ed9 Curie v\u00e0 chuy\u1ec3n \u0111\u1ed5i pha ferromagnetic\" \/><\/p>\n<p>Nhi\u1ec7t \u0111\u1ed9 Curie l\u00e0 \u0111i\u1ec3m m\u00e0 t\u1ea1i \u0111\u00f3 m\u1ed9t v\u1eadt li\u1ec7u t\u1eeb t\u00ednh m\u1ea5t \u0111i t\u1eeb t\u00ednh v\u0129nh c\u1eedu c\u1ee7a n\u00f3. \u0110\u00e2y l\u00e0 m\u1ed9t thu\u1ed9c t\u00ednh c\u01a1 b\u1ea3n g\u1eafn li\u1ec1n v\u1edbi v\u1eadt l\u00fd c\u1ee7a t\u1eeb t\u00ednh. D\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 n\u00e0y, c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 neodymium ho\u1eb7c ferrite c\u00f3 t\u00ednh s\u1eaft t\u1eeb, ngh\u0129a l\u00e0 c\u00e1c m\u00f4men t\u1eeb nguy\u00ean t\u1eed c\u1ee7a ch\u00fang th\u1eb3ng h\u00e0ng v\u00e0 t\u1ea1o ra c\u00e1c t\u1eeb tr\u01b0\u1eddng m\u1ea1nh. Khi v\u1eadt li\u1ec7u \u0111\u1ea1t \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 Curie, n\u00f3 tr\u1ea3i qua qu\u00e1 tr\u00ecnh chuy\u1ec3n pha v\u00e0 tr\u1edf th\u00e0nh ch\u1ea5t thu\u1eadn t\u1eeb. \u1ede tr\u1ea1ng th\u00e1i n\u00e0y, c\u00e1c m\u00f4men t\u1eeb c\u1ee7a nguy\u00ean t\u1eed \u0111\u01b0\u1ee3c \u0111\u1ecbnh h\u01b0\u1edbng ng\u1eabu nhi\u00ean, khi\u1ebfn v\u1eadt li\u1ec7u m\u1ea5t \u0111i \u0111\u1ed9 b\u1ec1n t\u1eeb t\u00ednh.<\/p>\n<p>Nhi\u1ec7t \u0111\u1ed9 Curie \u0111i\u1ec3n h\u00ecnh thay \u0111\u1ed5i t\u00f9y theo v\u1eadt li\u1ec7u. V\u00ed d\u1ee5, nam ch\u00e2m neodymium c\u00f3 nhi\u1ec7t \u0111\u1ed9 Curie kho\u1ea3ng 310 \u0111\u1ebfn 400\u00b0C, t\u00f9y thu\u1ed9c v\u00e0o th\u00e0nh ph\u1ea7n ch\u00ednh x\u00e1c c\u1ee7a ch\u00fang, trong khi nam ch\u00e2m ferrite th\u01b0\u1eddng \u0111\u1ea1t kho\u1ea3ng 450\u00b0C \u0111\u1ebfn 460\u00b0C. M\u1ed9t khi nam ch\u00e2m v\u01b0\u1ee3t qua nhi\u1ec7t \u0111\u1ed9 n\u00e0y, c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb t\u00ednh c\u1ee7a n\u00f3 kh\u00f4ng quay tr\u1edf l\u1ea1i. S\u1ef1 m\u1ea5t m\u00e1t n\u00e0y l\u00e0 v\u0129nh vi\u1ec5n\u2014vi\u1ec7c v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 Curie v\u1ec1 c\u01a1 b\u1ea3n s\u1ebd l\u00e0m m\u1ea5t kh\u1ea3 n\u0103ng ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nam ch\u00e2m.<\/p>\n<p>Vi\u1ec7c hi\u1ec3u nhi\u1ec7t \u0111\u1ed9 Curie l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u1eeb t\u00ednh, v\u00ec n\u00f3 \u0111\u1eb7t ra m\u1ed9t gi\u1edbi h\u1ea1n nhi\u1ec7t tuy\u1ec7t \u0111\u1ed1i m\u00e0 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n \u0111\u00f3 hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c ph\u1ee5c h\u1ed3i.<\/p>\n<h2>So s\u00e1nh Nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a v\u00e0 Nhi\u1ec7t \u0111\u1ed9 Curie<\/h2>\n<p>c\u1ea3\u00a0<strong>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/strong>\u00a0v\u00e0\u00a0<strong>Nhi\u1ec7t \u0111\u1ed9 Curie<\/strong>\u00a0\u0111\u1ec1u r\u1ea5t quan tr\u1ecdng khi l\u00e0m vi\u1ec7c v\u1edbi v\u1eadt li\u1ec7u t\u1eeb t\u00ednh, nh\u01b0ng ch\u00fang c\u00f3 \u00fd ngh\u0129a r\u1ea5t kh\u00e1c nhau.<\/p>\n<ul>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/strong>\u00a0l\u00e0 nhi\u1ec7t \u0111\u1ed9 cao nh\u1ea5t m\u00e0 nam ch\u00e2m c\u00f3 th\u1ec3 x\u1eed l\u00fd an to\u00e0n m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t ho\u1eb7c b\u1ecb h\u01b0 h\u1ea1i theo th\u1eddi gian.<\/li>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9 Curie<\/strong>\u00a0l\u00e0 \u0111i\u1ec3m m\u00e0 v\u1eadt li\u1ec7u c\u1ee7a nam ch\u00e2m m\u1ea5t \u0111i c\u00e1c \u0111\u1eb7c t\u00ednh s\u1eaft t\u1eeb c\u1ee7a n\u00f3\u2014n\u00f3 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t nam ch\u00e2m.<\/li>\n<\/ul>\n<h3>T\u1ea1i sao Nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a l\u1ea1i th\u1ea5p h\u01a1n Nhi\u1ec7t \u0111\u1ed9 Curie<\/h3>\n<p>C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1eb7t nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi nhi\u1ec7t \u0111\u1ed9 Curie. \u0110\u00f3 l\u00e0 v\u00ec d\u01b0\u1edbi \u0111i\u1ec3m Curie, nam ch\u00e2m v\u1eabn ho\u1ea1t \u0111\u1ed9ng nh\u01b0ng c\u00f3 th\u1ec3 b\u1eaft \u0111\u1ea7u m\u1ea5t \u0111i \u0111\u1ed9 b\u1ec1n n\u1ebfu b\u1ecb \u0111\u1ea9y qu\u00e1 cao ho\u1eb7c qu\u00e1 l\u00e2u. Duy tr\u00ec d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c t\u1ed1i \u0111a \u0111\u1ea3m b\u1ea3o nam ch\u00e2m t\u1ed3n t\u1ea1i l\u00e2u h\u01a1n m\u00e0 kh\u00f4ng b\u1ecb suy gi\u1ea3m hi\u1ec7u su\u1ea5t ho\u1eb7c h\u01b0 h\u1ecfng kh\u00f4ng th\u1ec3 ph\u1ee5c h\u1ed3i.<\/p>\n<p>V\u00ed d\u1ee5, m\u1ed9t nam ch\u00e2m neodymium c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec7t \u0111\u1ed9 Curie kho\u1ea3ng 310\u2013320\u00b0C nh\u01b0ng nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a g\u1ea7n 80\u2013150\u00b0C, t\u00f9y thu\u1ed9c v\u00e0o c\u1ea5p \u0111\u1ed9 c\u1ee7a n\u00f3. V\u1eadn h\u00e0nh g\u1ea7n ho\u1eb7c tr\u00ean \u0111i\u1ec3m Curie g\u00e2y m\u1ea5t t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n, trong khi v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a l\u00e0m y\u1ebfu d\u1ea7n nam ch\u00e2m theo th\u1eddi gian.<\/p>\n<h3>R\u1ee7i ro khi v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 n\u00e0y<\/h3>\n<ul>\n<li>\n<h3>V\u01b0\u1ee3t qu\u00e1 Nhi\u1ec7t \u0111\u1ed9 V\u1eadn h\u00e0nh T\u1ed1i \u0111a:<\/h3>\n<p>B\u1ea1n \u0111\u1ed1i m\u1eb7t v\u1edbi nguy c\u01a1 m\u1ea5t t\u1eeb t\u00ednh nhanh h\u01a1n, h\u1ecfng c\u01a1 h\u1ecdc ho\u1eb7c tu\u1ed5i th\u1ecd s\u1ea3n ph\u1ea9m gi\u1ea3m. \u0110\u00f3 l\u00e0 qu\u00e1 tr\u00ecnh gi\u1ea3m hi\u1ec7u su\u1ea5t ch\u1eadm ch\u1ea1p.<\/li>\n<li>\n<h3>V\u01b0\u1ee3t qu\u00e1 Nhi\u1ec7t \u0111\u1ed9 Curie:<\/h3>\n<p>Ch\u1ea5t li\u1ec7u t\u1eeb tr\u1edf th\u00e0nh pha t\u1eeb t\u1eeb ferromagnetic sang paramagnetic. S\u1ef1 thay \u0111\u1ed5i n\u00e0y kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c trong \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng, d\u1eabn \u0111\u1ebfn m\u1ea5t t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n.<\/li>\n<\/ul>\n<h3>Nh\u1eefng hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn<\/h3>\n<ul>\n<li>M\u1ed9t s\u1ed1 ng\u01b0\u1eddi ngh\u0129 r\u1eb1ng nam ch\u00e2m ng\u1eebng ho\u1ea1t \u0111\u1ed9ng ngay l\u1eadp t\u1ee9c khi \u0111\u1ea1t nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a. Th\u1ef1c t\u1ebf, \u0111\u00f3 ch\u1ec9 l\u00e0 gi\u1edbi h\u1ea1n c\u1ea3nh b\u00e1o \u2014 kh\u00f4ng ph\u1ea3i \u0111i\u1ec3m h\u1ecfng h\u00f3c ngay l\u1eadp t\u1ee9c.<\/li>\n<li>Nh\u1eefng ng\u01b0\u1eddi kh\u00e1c nh\u1ea7m l\u1eabn gi\u1eefa nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a v\u00e0 nhi\u1ec7t \u0111\u1ed9 Curie, cho r\u1eb1ng ch\u00fang g\u1ea7n nh\u01b0 gi\u1ed1ng nhau. Kh\u00f4ng ph\u1ea3i v\u1eady. Nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a l\u00e0 gi\u1edbi h\u1ea1n an to\u00e0n khi v\u1eadn h\u00e0nh; nhi\u1ec7t \u0111\u1ed9 Curie l\u00e0 ng\u01b0\u1ee1ng v\u1eadt l\u00fd n\u01a1i t\u1eeb t\u00ednh bi\u1ebfn m\u1ea5t.<\/li>\n<\/ul>\n<p>Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u00fap tr\u00e1nh nh\u1eefng sai l\u1ea7m t\u1ed1n k\u00e9m v\u00e0 \u0111\u1ea3m b\u1ea3o nam ch\u00e2m ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf.<\/p>\n<h2>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf cho k\u1ef9 s\u01b0 v\u00e0 ng\u01b0\u1eddi mua<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/artseo.cn\/apis\/uploads\/20250806\/Magnet_Temperature_Selection_Guide_Jyd.webp\" alt=\"H\u01b0\u1edbng d\u1eabn ch\u1ecdn nhi\u1ec7t \u0111\u1ed9 nam ch\u00e2m\" \/><\/p>\n<p>Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa Nhi\u1ec7t \u0111\u1ed9 V\u1eadn h\u00e0nh T\u1ed1i \u0111a v\u00e0 Nhi\u1ec7t \u0111\u1ed9 Curie l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng khi ch\u1ecdn nam ch\u00e2m cho \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn, \u0111i\u1ec7n t\u1eed v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao \u0111i\u1ec1u n\u00e0y quan tr\u1ecdng:<\/p>\n<ul>\n<li>\n<h3>L\u1ef1a ch\u1ecdn nam ch\u00e2m ph\u00f9 h\u1ee3p<\/h3>\n<p>Hi\u1ec3u c\u00e1c gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 n\u00e0y gi\u00fap b\u1ea1n ch\u1ecdn nam ch\u00e2m kh\u00f4ng m\u1ea5t s\u1ee9c m\u1ea1nh ho\u1eb7c h\u1ecfng h\u00f3c trong m\u00f4i tr\u01b0\u1eddng l\u00e0m vi\u1ec7c c\u1ee7a thi\u1ebft b\u1ecb. V\u00ed d\u1ee5, nam ch\u00e2m neodymium c\u00f3 s\u1ee9c m\u1ea1nh l\u1edbn nh\u01b0ng nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a th\u1ea5p h\u01a1n so v\u1edbi nam ch\u00e2m ferrite, c\u00f3 th\u1ec3 ch\u1ecbu nhi\u1ec7t cao h\u01a1n nh\u01b0ng \u00edt t\u1eeb t\u00ednh h\u01a1n.<\/li>\n<li>\n<h3>Qu\u1ea3n l\u00fd nhi\u1ec7t v\u00e0 thi\u1ebft k\u1ebf<\/h3>\n<p>Kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 ch\u1ecdn lo\u1ea1i nam ch\u00e2m. Qu\u1ea3n l\u00fd nhi\u1ec7t t\u1ed1t \u2014 nh\u01b0 t\u1ea3n nhi\u1ec7t, h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t ho\u1eb7c lu\u1ed3ng kh\u00f4ng kh\u00ed ph\u00f9 h\u1ee3p \u2014 gi\u00fap gi\u1eef nam ch\u00e2m trong ph\u1ea1m vi an to\u00e0n, ng\u0103n ng\u1eeba h\u1ecfng h\u00f3c \u0111\u1eaft \u0111\u1ecf ho\u1eb7c gi\u1ea3m hi\u1ec7u su\u1ea5t theo th\u1eddi gian.<\/li>\n<li>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 b\u1ea3o h\u00e0nh v\u00e0 an to\u00e0n<\/h3>\n<p>V\u1eadn h\u00e0nh nam ch\u00e2m tr\u00ean nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh t\u1ed1i \u0111a c\u00f3 th\u1ec3 l\u00e0m m\u1ea5t hi\u1ec7u l\u1ef1c b\u1ea3o h\u00e0nh v\u00e0 g\u00e2y ra r\u1ee7i ro an to\u00e0n. Nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao kh\u00f4ng ch\u1ec9 l\u00e0m gi\u1ea3m s\u1ee9c m\u1ea1nh t\u1eeb t\u00ednh \u2014 m\u00e0 c\u00f2n c\u00f3 th\u1ec3 g\u00e2y h\u01b0 h\u1ecfng kh\u00f4ng th\u1ec3 ph\u1ee5c h\u1ed3i, \u0111\u1eb7c bi\u1ec7t khi nhi\u1ec7t \u0111\u1ed9 g\u1ea7n \u0111i\u1ec3m Curie.<\/li>\n<li>\n<h3>Hi\u1ec7u su\u1ea5t l\u00e2u d\u00e0i<\/h3>\n<p>Gi\u1eef trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 n\u00e0y \u0111\u1ed3ng ngh\u0129a v\u1edbi hi\u1ec7u su\u1ea5t nam ch\u00e2m \u0111\u00e1ng tin c\u1eady v\u00e0 \u1ed5n \u0111\u1ecbnh su\u1ed1t v\u00f2ng \u0111\u1eddi s\u1ea3n ph\u1ea9m c\u1ee7a b\u1ea1n. \u0110i\u1ec1u n\u00e0y gi\u00fap gi\u1ea3m s\u1ed1 l\u1ea7n thay th\u1ebf v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 b\u1ea3o tr\u00ec v\u1ec1 sau.<\/li>\n<\/ul>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 c\u00e1ch ch\u1ecdn nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao, h\u00e3y xem danh m\u1ee5c c\u1ee7a NBAEM\u00a0<a href=\"https:\/\/nbaem.com\/vi\/high-temperature-magnets\/\" target=\"_blank\" rel=\"noopener\">nam ch\u00e2m nhi\u1ec7t \u0111\u1ed9 cao<\/a>. Ch\u00fang cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p \u0111\u00e1ng tin c\u1eady ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t, \u0111\u1ea3m b\u1ea3o b\u1ea1n \u0111\u1ea1t hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n t\u1ed1t nh\u1ea5t cho c\u00e1c d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh.<\/p>\n<h2>Ph\u01b0\u01a1ng ph\u00e1p ti\u1ebfp c\u1eadn c\u1ee7a NBAEM \u0111\u1ed1i v\u1edbi v\u1eadt li\u1ec7u t\u1eeb ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao<\/h2>\n<p>T\u1ea1i NBAEM, ch\u00fang t\u00f4i hi\u1ec3u nh\u1eefng th\u00e1ch th\u1ee9c khi l\u00e0m vi\u1ec7c v\u1edbi nam ch\u00e2m trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao. \u0110\u00f3 l\u00e0 l\u00fd do v\u00ec sao d\u00f2ng s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i t\u1eadp trung v\u00e0o c\u00e1c v\u1eadt li\u1ec7u t\u1eeb \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady ngay c\u1ea3 g\u1ea7n gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a c\u1ee7a ch\u00fang. D\u00f9 b\u1ea1n c\u1ea7n nam ch\u00e2m neodymium c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao h\u01a1n ho\u1eb7c nam ch\u00e2m ferrite ch\u1ecbu nhi\u1ec7t t\u1ed1t d\u01b0\u1edbi nhi\u1ec7t, ch\u00fang t\u00f4i \u0111\u1ec1u cung c\u1ea5p c\u00e1c l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p \u0111\u00f2i h\u1ecfi kh\u1eaft khe.<\/p>\n<p>Quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c t\u00f9y ch\u1ec9nh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o \u1ed5n \u0111\u1ecbnh nhi\u1ec7t. Ch\u00fang t\u00f4i s\u1eed d\u1ee5ng k\u1ef9 thu\u1eadt nung k\u1ebft v\u00e0 ph\u1ee7 l\u1edbp ch\u00ednh x\u00e1c \u0111\u1ec3 gi\u1ea3m thi\u1ec3u s\u1ef1 suy gi\u1ea3m t\u1eeb t\u00ednh, gi\u1eef cho s\u1ee9c m\u1ea1nh c\u1ee7a nam ch\u00e2m c\u1ee7a b\u1ea1n \u1ed5n \u0111\u1ecbnh theo th\u1eddi gian. Th\u00eam v\u00e0o \u0111\u00f3, ch\u00fang t\u00f4i ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o nam ch\u00e2m kh\u00f4ng m\u1ea5t \u0111i c\u00e1c \u0111\u1eb7c t\u00ednh khi ti\u1ebfp x\u00fac g\u1ea7n gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9.<\/p>\n<p>T\u00f9y ch\u1ec9nh l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong c\u00f4ng vi\u1ec7c c\u1ee7a ch\u00fang t\u00f4i. NBAEM c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c lo\u1ea1i nam ch\u00e2m v\u00e0 l\u1edbp ph\u1ee7 \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u nhi\u1ec7t c\u1ee7a b\u1ea1n, gi\u00fap b\u1ea1n c\u00e2n b\u1eb1ng gi\u1eefa chi ph\u00ed v\u00e0 hi\u1ec7u su\u1ea5t. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch cho \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn v\u00e0 \u0111i\u1ec7n t\u1eed ho\u1ea1t \u0111\u1ed9ng trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/p>\n<p>V\u00ed d\u1ee5, m\u1ed9t kh\u00e1ch h\u00e0ng trong ng\u00e0nh \u00f4 t\u00f4 \u0111\u00e3 d\u1ef1a v\u00e0o nam ch\u00e2m neodymium ch\u1ecbu nhi\u1ec7t cao c\u1ee7a ch\u00fang t\u00f4i cho m\u1ed9t nguy\u00ean m\u1eabu \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n. V\u1edbi gi\u1ea3i ph\u00e1p t\u00f9y ch\u1ec9nh c\u1ee7a ch\u00fang t\u00f4i, h\u1ecd duy tr\u00ec s\u1ee9c m\u1ea1nh c\u1ee7a nam ch\u00e2m l\u00ean \u0111\u1ebfn 120\u00b0C, v\u01b0\u1ee3t xa gi\u1edbi h\u1ea1n ti\u00eau chu\u1ea9n, n\u00e2ng cao hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a \u0111\u1ed9ng c\u01a1.<\/p>\n<p>T\u00f3m l\u1ea1i, ph\u01b0\u01a1ng ph\u00e1p c\u1ee7a NBAEM k\u1ebft h\u1ee3p khoa h\u1ecdc v\u1eadt li\u1ec7u v\u00e0 s\u1ea3n xu\u1ea5t linh ho\u1ea1t \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u \u0111\u1eb7c th\u00f9 c\u1ee7a kh\u00e1ch h\u00e0ng t\u1ea1i th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam, nh\u1eefng ng\u01b0\u1eddi y\u00eau c\u1ea7u nam ch\u00e2m hi\u1ec7u su\u1ea5t cao d\u01b0\u1edbi \u00e1p l\u1ef1c nhi\u1ec7t.<\/p>\n<\/div>\n<div class=\"post-footer\">\n<div class=\"post-tags\">\n<div class=\"article-categories\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<nav class=\"post-navigation thw-sept\">\n<div class=\"row no-gutters\">\n<div class=\"col-12 col-md-6\">\n<div class=\"post-previous\"><\/div>\n<\/div>\n<\/div>\n<\/nav>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 s\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a v\u00e0 Nhi\u1ec7t \u0111\u1ed9 Curie trong c\u00e1c v\u1eadt li\u1ec7u t\u1eeb \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 tin c\u1eady t\u1ed1i \u01b0u.<\/p>","protected":false},"author":1,"featured_media":1766,"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-1768","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\/Curie_Temperature_and_Ferromagnetic_Phase_Transition_wWb.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1768","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=1768"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1768\/revisions"}],"predecessor-version":[{"id":1813,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1768\/revisions\/1813"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1766"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}