{"id":2004,"date":"2025-08-25T04:29:13","date_gmt":"2025-08-25T04:29:13","guid":{"rendered":"https:\/\/nbaem.com\/?p=2004"},"modified":"2025-08-25T05:18:27","modified_gmt":"2025-08-25T05:18:27","slug":"what-is-the-effect-of-heating-neodymium-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/what-is-the-effect-of-heating-neodymium-magnets\/","title":{"rendered":"\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 \u0111\u1ebfn nam ch\u00e2m Neodymium"},"content":{"rendered":"<h2>Nam ch\u00e2m Neodymium l\u00e0 g\u00ec<\/h2>\n<p><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/products\/neodymium-magnet\/\" target=\"_blank\" rel=\"noopener\"><strong>Nam ch\u00e2m Neodymium<\/strong> <\/a><\/span>l\u00e0 m\u1ed9t lo\u1ea1i nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb h\u1ee3p kim c\u1ee7a <strong>neodymium (Nd), s\u1eaft (Fe), v\u00e0 boron (B)<\/strong>, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 <strong>NdFeB<\/strong>. S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y t\u1ea1o ra lo\u1ea1i nam ch\u00e2m v\u0129nh c\u1eedu m\u1ea1nh nh\u1ea5t hi\u1ec7n nay, mang l\u1ea1i t\u1ef7 l\u1ec7 s\u1ee9c m\u1ea1nh so v\u1edbi k\u00edch th\u01b0\u1edbc v\u01b0\u1ee3t tr\u1ed9i.<\/p>\n<p>Nh\u1eefng nam ch\u00e2m n\u00e0y n\u1ed5i ti\u1ebfng v\u1edbi ba \u0111\u1eb7c \u0111i\u1ec3m hi\u1ec7u su\u1ea5t ch\u00ednh:<\/p>\n<ul>\n<li><strong>\u0110\u1ed9 m\u1ea1nh t\u1eeb cao<\/strong> \u2013 Ch\u00fang t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb r\u1ea5t m\u1ea1nh ngay c\u1ea3 trong k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn.<\/li>\n<li><strong>\u0110\u1ed9 c\u01b0\u1ee1ng t\u1eeb cao<\/strong> \u2013 Ch\u00fang ch\u1ed1ng l\u1ea1i s\u1ef1 m\u1ea5t t\u1eeb do c\u00e1c tr\u01b0\u1eddng t\u1eeb b\u00ean ngo\u00e0i g\u00e2y ra.<\/li>\n<li><strong>Gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/strong> \u2013 T\u00f9y theo c\u1ea5p \u0111\u1ed9, h\u1ea7u h\u1ebft ch\u1ec9 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 trong kho\u1ea3ng <strong>80\u00b0C (176\u00b0F) v\u00e0 230\u00b0C (446\u00b0F)<\/strong> tr\u01b0\u1edbc khi m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh.<\/li>\n<\/ul>\n<p>V\u00ec s\u1ee9c m\u1ea1nh v\u00e0 k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn, nam ch\u00e2m neodymium \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi c\u1ea3 hi\u1ec7u su\u1ea5t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t, nh\u01b0:<\/p>\n<ul>\n<li>\u0110\u1ed9ng c\u01a1 \u0111i\u1ec7n v\u00e0 turbine gi\u00f3<\/li>\n<li>\u1ed4 c\u1ee9ng v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/li>\n<li>Thi\u1ebft b\u1ecb y t\u1ebf nh\u01b0 m\u00e1y MRI<\/li>\n<li>Thi\u1ebft b\u1ecb \u00e2m thanh v\u00e0 loa<\/li>\n<li>D\u1ee5ng c\u1ee5 gi\u1eef v\u00e0 n\u00e2ng c\u00f4ng nghi\u1ec7p<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi k\u1ef9 s\u01b0, nh\u00e0 thi\u1ebft k\u1ebf v\u00e0 ng\u01b0\u1eddi \u0111am m\u00ea, vi\u1ec7c hi\u1ec3u bi\u1ebft <strong>kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t<\/strong> l\u00e0 r\u1ea5t quan tr\u1ecdng, v\u00ec qu\u00e1 nhi\u1ec7t c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n v\u00e0 gi\u1ea3m hi\u1ec7u su\u1ea5t.<\/p>\n<h2>Khoa h\u1ecdc \u0111\u1eb1ng sau vi\u1ec7c l\u00e0m n\u00f3ng nam ch\u00e2m Neodymium<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Neodymium_Magnet_Curie_Temperature_izIURQCeQ.webp\" alt=\"Nhi\u1ec7t \u0111\u1ed9 Curie c\u1ee7a nam ch\u00e2m Neodymium\" \/><\/p>\n<p>Nam ch\u00e2m Neodymium c\u00f3 \u0111\u01b0\u1ee3c s\u1ee9c m\u1ea1nh c\u1ee7a m\u00ecnh nh\u1edd s\u1ef1 s\u1eafp x\u1ebfp c\u1ee7a c\u00e1c v\u00f9ng t\u1eeb nh\u1ecf g\u1ecdi l\u00e0 <strong>mi\u1ec1n t\u1eeb<\/strong>. C\u00e1c mi\u1ec1n n\u00e0y gi\u1eef c\u1ed1 \u0111\u1ecbnh trong \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng, t\u1ea1o ra l\u1ef1c h\u00fat m\u1ea1nh c\u1ee7a nam ch\u00e2m. Khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng, n\u0103ng l\u01b0\u1ee3ng th\u00eam v\u00e0o khi\u1ebfn c\u00e1c electron trong c\u00e1c mi\u1ec1n n\u00e0y di chuy\u1ec3n nhi\u1ec1u h\u01a1n, l\u00e0m cho vi\u1ec7c duy tr\u00ec s\u1ef1 s\u1eafp x\u1ebfp tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n.<\/p>\n<p>M\u1ed7i nam ch\u00e2m Neodymium c\u00f3 m\u1ed9t <strong>nhi\u1ec7t \u0111\u1ed9 Curie<\/strong> \u2014 th\u01b0\u1eddng kho\u1ea3ng <strong>310\u2013400\u00b0C (590\u2013752\u00b0F)<\/strong> t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i. N\u1ebfu nam ch\u00e2m \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c n\u00e0y, c\u00e1c mi\u1ec1n m\u1ea5t ho\u00e0n to\u00e0n s\u1ef1 s\u1eafp x\u1ebfp, v\u00e0 nam ch\u00e2m tr\u1edf n\u00ean m\u1ea5t t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n. Tr\u01b0\u1edbc khi \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c c\u1ef1c \u0111oan \u0111\u00f3, nhi\u1ec7t c\u00f3 th\u1ec3 g\u00e2y ra gi\u1ea3m s\u1ee9c m\u1ea1nh.<\/p>\n<p>C\u00f3 c\u00e1c <strong>v\u00f9ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t chung<\/strong> c\u1ea7n xem x\u00e9t:<\/p>\n<ul>\n<li><strong>Ph\u1ea1m vi an to\u00e0n<\/strong> \u2013 H\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i ti\u00eau chu\u1ea9n ho\u1ea1t \u0111\u1ed9ng t\u1ed1t d\u01b0\u1edbi 80\u00b0C (176\u00b0F) m\u00e0 kh\u00f4ng m\u1ea5t s\u1ee9c m\u1ea1nh r\u00f5 r\u1ec7t.<\/li>\n<li><strong>V\u00f9ng c\u1ea3nh b\u00e1o<\/strong> \u2013 Trong kho\u1ea3ng t\u1eeb 80\u00b0C \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nam ch\u00e2m, l\u1ef1c h\u00fat b\u1eaft \u0111\u1ea7u gi\u1ea3m v\u00e0 c\u00f3 th\u1ec3 kh\u00f4ng ph\u1ee5c h\u1ed3i ho\u00e0n to\u00e0n.<\/li>\n<li><strong>V\u00f9ng nguy hi\u1ec3m<\/strong> \u2013 Tr\u00ean nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a \u0111\u1ecbnh m\u1ee9c, x\u1ea3y ra h\u01b0 h\u1ecfng v\u0129nh vi\u1ec5n v\u00e0 m\u1ea5t t\u1eeb t\u00ednh, ngay c\u1ea3 khi nam ch\u00e2m ngu\u1ed9i l\u1ea1i.<\/li>\n<\/ul>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c gi\u1edbi h\u1ea1n n\u00e0y l\u00e0 ch\u00eca kh\u00f3a \u2014 \u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn ho\u1eb7c d\u1ee5ng c\u1ee5 n\u01a1i nhi\u1ec7t \u0111\u1ed9 t\u0103ng l\u00ean th\u01b0\u1eddng xuy\u00ean.<\/p>\n<h2>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ebfn nam ch\u00e2m Neodymium<\/h2>\n<p>Nhi\u1ec7t \u0111\u1ed9 cao \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nam ch\u00e2m neodymium c\u1ea3 ng\u1eafn h\u1ea1n v\u00e0 d\u00e0i h\u1ea1n, t\u00f9y thu\u1ed9c v\u00e0o nhi\u1ec7t \u0111\u1ed9 v\u00e0 th\u1eddi gian nung n\u00f3ng.<\/p>\n<p><strong>\u1ea2nh h\u01b0\u1edfng t\u1ea1m th\u1eddi<\/strong> x\u1ea3y ra khi nam ch\u00e2m \u0111\u01b0\u1ee3c l\u00e0m \u1ea5m nh\u01b0ng v\u1eabn d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a c\u1ee7a n\u00f3. B\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y s\u1ef1 gi\u1ea3m l\u1ef1c h\u00fat t\u1eeb nam ch\u00e2m, nh\u01b0ng khi ngu\u1ed9i \u0111i, h\u1ea7u h\u1ebft ho\u1eb7c t\u1ea5t c\u1ea3 s\u1ee9c m\u1ea1nh s\u1ebd tr\u1edf l\u1ea1i.<\/p>\n<p><strong>\u1ea2nh h\u01b0\u1edfng v\u0129nh vi\u1ec5n<\/strong> x\u1ea3y ra n\u1ebfu nhi\u1ec7t \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n quan tr\u1ecdng c\u1ee7a nam ch\u00e2m (g\u1ea7n nhi\u1ec7t \u0111\u1ed9 Curie c\u1ee7a n\u00f3). T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, m\u1ea5t t\u1eeb t\u00ednh l\u00e0 kh\u00f4ng th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c, v\u00e0 nam ch\u00e2m kh\u00f4ng th\u1ec3 kh\u00f4i ph\u1ee5c v\u1ec1 \u0111\u1ed9 m\u1ea1nh ban \u0111\u1ea7u.<\/p>\n<p><strong>M\u1ea5t \u0111\u1ed9 m\u1ea1nh t\u1eeb<\/strong> t\u0103ng theo nhi\u1ec7t. Ngay c\u1ea3 nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra m\u1ea5t m\u00e1t \u0111o \u0111\u01b0\u1ee3c:<\/p>\n<ul>\n<li>Kho\u1ea3ng 5\u201310% m\u1ea5t m\u00e1t n\u1ebfu nung g\u1ea7n ph\u1ea1m vi an to\u00e0n tr\u00ean c\u00f9ng<\/li>\n<li>H\u01a1n 20% m\u1ea5t m\u00e1t khi v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 \u0111\u1ecbnh m\u1ee9c<\/li>\n<li>Tr\u00ean \u0111i\u1ec3m Curie, g\u1ea7n nh\u01b0 m\u1ea5t ho\u00e0n to\u00e0n t\u1eeb t\u00ednh<\/li>\n<\/ul>\n<p><strong>H\u01b0 h\u1ecfng v\u1eadt l\u00fd v\u00e0 c\u1ea5u tr\u00fac<\/strong> l\u00e0 m\u1ed9t m\u1ed1i quan t\u00e2m kh\u00e1c. Nhi\u1ec7t \u0111\u1ed9 cao c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn:<\/p>\n<ul>\n<li>C\u00e1c v\u1ebft n\u1ee9t nh\u1ecf tr\u00ean b\u1ec1 m\u1eb7t nam ch\u00e2m, l\u00e0m cho n\u00f3 d\u1ec5 v\u1ee1 h\u01a1n<\/li>\n<li>\u0102n m\u00f2n nhanh h\u01a1n, \u0111\u1eb7c bi\u1ec7t n\u1ebfu l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 b\u1ecb h\u01b0 h\u1ecfng<\/li>\n<li>L\u00e0m y\u1ebfu c\u1ea5u tr\u00fac h\u1ea1t b\u00ean trong c\u1ee7a nam ch\u00e2m<\/li>\n<\/ul>\n<p><strong>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb quan tr\u1ecdng<\/strong>:<\/p>\n<ul>\n<li><strong>Kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb<\/strong> (kh\u00e1ng l\u1ea1i qu\u00e1 tr\u00ecnh m\u1ea5t t\u1eeb) th\u01b0\u1eddng gi\u1ea3m khi nhi\u1ec7t t\u0103ng, l\u00e0m nam ch\u00e2m d\u1ec5 b\u1ecb y\u1ebfu \u0111i<\/li>\n<li><strong>\u0110\u1ed9 gi\u1eef t\u1eeb<\/strong> (\u0111\u1ed9 m\u1ea1nh t\u1eeb d\u01b0) gi\u1ea3m \u0111\u1ec1u \u0111\u1eb7n \u1edf nhi\u1ec7t \u0111\u1ed9 cao<\/li>\n<\/ul>\n<h2>Nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a v\u00e0 gi\u1edbi h\u1ea1n nhi\u1ec7t<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Neodymium_Magnet_Thermal_Limits_bqzJHs6st.webp\" alt=\"Gi\u1edbi h\u1ea1n nhi\u1ec7t c\u1ee7a nam ch\u00e2m Neodymium\" \/><\/p>\n<p>Nam ch\u00e2m neodymium kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 \u0111\u1ec1u x\u1eed l\u00fd nhi\u1ec7t gi\u1ed1ng nhau. M\u1ed7i lo\u1ea1i c\u1ea5p \u0111\u1ed9 c\u00f3 \u0111i\u1ec3m ri\u00eang c\u1ee7a n\u00f3 <strong>nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a<\/strong>, \u0111\u00f3 l\u00e0 \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh t\u1eeb t\u00ednh. V\u00ed d\u1ee5:<\/p>\n<table>\n<thead>\n<tr>\n<th>C\u1ea5p \u0111\u1ed9<\/th>\n<th>Nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a ho\u1ea1t \u0111\u1ed9ng (\u00b0F)<\/th>\n<th>Nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a ho\u1ea1t \u0111\u1ed9ng (\u00b0C)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>N35<\/td>\n<td>~176\u00b0F<\/td>\n<td>Kho\u1ea3ng 80\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>N42<\/td>\n<td>~176\u00b0F<\/td>\n<td>Kho\u1ea3ng 80\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>N52<\/td>\n<td>~140\u00b0F<\/td>\n<td>~60\u00b0C<\/td>\n<\/tr>\n<tr>\n<td>C\u00e1c lo\u1ea1i c\u1ea5p \u0111\u1ed9 ch\u1ecbu nhi\u1ec7t cao (v\u00ed d\u1ee5, N35EH)<\/td>\n<td>392\u00b0F<\/td>\n<td>200\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u01b0\u1eddng cung c\u1ea5p m\u1ed9t <strong>ph\u1ea1m vi l\u00e0m vi\u1ec7c an to\u00e0n<\/strong> nh\u01b0 m\u1ed9t gi\u1edbi h\u1ea1n tuy\u1ec7t \u0111\u1ed1i \u0111\u1ec3 gi\u1eef cho nam ch\u00e2m kh\u00f4ng b\u1ecb suy gi\u1ea3m theo th\u1eddi gian. B\u1edfi v\u00ec h\u01b0 h\u1ecfng do nhi\u1ec7t c\u00f3 th\u1ec3 di\u1ec5n ra t\u1eeb t\u1eeb\u2014vi\u1ec7c duy tr\u00ec ch\u1ec9 d\u01b0\u1edbi m\u1ee9c t\u1ed1i \u0111a trong th\u1eddi gian d\u00e0i v\u1eabn c\u00f3 th\u1ec3 g\u00e2y m\u1ea5t t\u1eeb t\u00ednh.<\/p>\n<p><strong>X\u1eed l\u00fd nhi\u1ec7t<\/strong> trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t c\u1ee7a nam ch\u00e2m, \u0111\u1eb7c bi\u1ec7t cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p n\u01a1i nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng cao h\u01a1n l\u00e0 ph\u1ed5 bi\u1ebfn. <strong>L\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7<\/strong> nh\u01b0 nickel, epoxy, ho\u1eb7c l\u1edbp ph\u1ee7 ch\u1ecbu nhi\u1ec7t \u0111\u1eb7c bi\u1ec7t c\u0169ng gi\u00fap \u00edch. Trong khi l\u1edbp ph\u1ee7 kh\u00f4ng ng\u0103n ch\u1eb7n s\u1ef1 m\u1ea5t t\u1eeb t\u00ednh, ch\u00fang ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng b\u1ec1 m\u1eb7t, \u0103n m\u00f2n v\u00e0 c\u00e1c v\u1ebft n\u1ee9t nh\u1ecf c\u00f3 th\u1ec3 do nhi\u1ec7t th\u00fac \u0111\u1ea9y.<\/p>\n<h2>\u1ea2nh h\u01b0\u1edfng th\u1ef1c t\u1ebf \u0111\u1ed1i v\u1edbi s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 ti\u00eau d\u00f9ng<\/h2>\n<p>Nhi\u1ec7t c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m neodymium trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf. Trong \u0111\u1ed9ng c\u01a1, m\u00e1y ph\u00e1t \u0111i\u1ec7n v\u00e0 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00e1c, nhi\u1ec7t d\u01b0 th\u1eeba c\u00f3 th\u1ec3 khi\u1ebfn nam ch\u00e2m m\u1ea5t m\u1ed9t ph\u1ea7n s\u1ee9c m\u1ea1nh, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m m\u00f4-men xo\u1eafn, gi\u1ea3m hi\u1ec7u qu\u1ea3 ho\u1eb7c khi\u1ebfn thi\u1ebft b\u1ecb ng\u1eebng ho\u1ea1t \u0111\u1ed9ng ho\u00e0n to\u00e0n. Ngay c\u1ea3 m\u1ed9t th\u1eddi gian ng\u1eafn v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a cho ph\u00e9p c\u0169ng c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t m\u1ea5t t\u1eeb t\u00ednh c\u1ee5c b\u1ed9 ho\u1eb7c v\u0129nh vi\u1ec5n.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u00f4ng nghi\u1ec7p ho\u1ea1t \u0111\u1ed9ng d\u01b0\u1edbi t\u1ea3i tr\u1ecdng n\u1eb7ng ho\u1eb7c trong m\u00f4i tr\u01b0\u1eddng n\u00f3ng\u2014nh\u01b0 turbine gi\u00f3, \u0111\u1ed9ng c\u01a1 EV ho\u1eb7c m\u00e1y CNC\u2014vi\u1ec7c b\u1ecf qua <strong>kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t c\u1ee7a nam ch\u00e2m neodymium<\/strong> c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c s\u1ef1 c\u1ed1 \u0111\u1eaft \u0111\u1ecf. Trong c\u00e1c s\u1ea3n ph\u1ea9m ti\u00eau d\u00f9ng, nh\u01b0 loa ho\u1eb7c gi\u00e1 \u0111\u1ee1 t\u1eeb t\u00ednh, nhi\u1ec7t t\u1eeb c\u00e1c th\u00e0nh ph\u1ea7n l\u00e2n c\u1eadn c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m hi\u1ec7u su\u1ea5t d\u1ea7n theo th\u1eddi gian.<\/p>\n<p><strong>R\u1ee7i ro khi b\u1ecf qua t\u00e1c \u0111\u1ed9ng nhi\u1ec7t:<\/strong><\/p>\n<ul>\n<li>Gi\u1ea3m c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb v\u00e0 m\u1ea5t hi\u1ec7u su\u1ea5t<\/li>\n<li>C\u00e1c s\u1ef1 c\u1ed1 do qu\u00e1 nhi\u1ec7t c\u1ee7a thi\u1ebft b\u1ecb<\/li>\n<li>Nguy c\u01a1 an to\u00e0n t\u1eeb c\u00e1c v\u1ea5n \u0111\u1ec1 c\u01a1 h\u1ecdc ho\u1eb7c qu\u00e1 t\u1ea3i \u0111i\u1ec7n<\/li>\n<li>Th\u1eddi gian s\u1eed d\u1ee5ng c\u1ee7a thi\u1ebft b\u1ecb b\u1ecb r\u00fat ng\u1eafn<\/li>\n<\/ul>\n<p><strong>C\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u1ed1t nh\u1ea5t \u0111\u1ec3 ch\u1ecdn nam ch\u00e2m cho m\u00f4i tr\u01b0\u1eddng n\u00f3ng:<\/strong><\/p>\n<ul>\n<li>Ph\u00f9 h\u1ee3p c\u1ea5p \u0111\u1ed9 nam ch\u00e2m v\u1edbi nhi\u1ec7t \u0111\u1ed9 v\u1eadn h\u00e0nh d\u1ef1 ki\u1ebfn<\/li>\n<li>S\u1eed d\u1ee5ng l\u1edbp ph\u1ee7 ch\u1ecbu nhi\u1ec7t ho\u1eb7c bao b\u1ecdc \u0111\u1ec3 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh tho\u00e1i h\u00f3a nhi\u1ec7t v\u00e0 \u0103n m\u00f2n<\/li>\n<li>D\u1ef1 ph\u00f2ng m\u1ed9t kho\u1ea3ng an to\u00e0n nhi\u1ec7t v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a d\u1ef1 ki\u1ebfn<\/li>\n<li>\u0110\u1eb7t nam ch\u00e2m xa c\u00e1c ngu\u1ed3n nhi\u1ec7t \u0111\u00e3 bi\u1ebft trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf<\/li>\n<li>Xem x\u00e9t c\u00e1c c\u1ea5p \u0111\u1ed9 ch\u1ecbu nhi\u1ec7t cao ho\u1eb7c c\u00e1c lo\u1ea1i nam ch\u00e2m thay th\u1ebf (nh\u01b0 SmCo) cho \u0111i\u1ec1u ki\u1ec7n c\u1ef1c \u0111oan<\/li>\n<\/ul>\n<p>Gi\u1eef nam ch\u00e2m trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 an to\u00e0n c\u1ee7a ch\u00fang \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh v\u00e0 tr\u00e1nh h\u1ecfng h\u00f3c s\u1edbm c\u1ee7a thi\u1ebft b\u1ecb, d\u00f9 b\u1ea1n \u0111ang v\u1eadn h\u00e0nh nh\u00e0 m\u00e1y c\u00f4ng nghi\u1ec7p hay x\u00e2y d\u1ef1ng c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed hi\u1ec7u su\u1ea5t cao t\u1ea1i nh\u00e0.<\/p>\n<h2>Gi\u1ea3m t\u00e1c \u0111\u1ed9ng nhi\u1ec7t l\u00ean nam ch\u00e2m neodymium<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Heat_Resistant_Neodymium_Magnets_AIzVFd9u1.webp\" alt=\"Nam ch\u00e2m Neodymium ch\u1ecbu nhi\u1ec7t\" \/><\/p>\n<p>N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao, c\u00f3 nh\u1eefng c\u00e1ch \u0111\u1ec3 b\u1ea3o v\u1ec7 nam ch\u00e2m neodymium kh\u1ecfi h\u01b0 h\u1ecfng do nhi\u1ec7t. Nh\u1eefng thay \u0111\u1ed5i nh\u1ecf trong thi\u1ebft k\u1ebf, v\u1eadt li\u1ec7u v\u00e0 l\u01b0u tr\u1eef c\u00f3 th\u1ec3 t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn.<\/p>\n<h3>C\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/h3>\n<ul>\n<li><strong>Ch\u1ecdn c\u00e1c lo\u1ea1i ch\u1ecbu nhi\u1ec7t<\/strong> \u2013 M\u1ed9t s\u1ed1 nam ch\u00e2m NdFeB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a cao h\u01a1n (l\u00ean \u0111\u1ebfn 230\u00b0F\u2013300\u00b0F) so v\u1edbi c\u00e1c lo\u1ea1i ti\u00eau chu\u1ea9n.<\/li>\n<li><strong>S\u1eed d\u1ee5ng h\u1ee3p kim \u0111\u1eb7c bi\u1ec7t<\/strong> \u2013 Th\u00eam c\u00e1c nguy\u00ean t\u1ed1 nh\u01b0 dysprosium ho\u1eb7c terbium c\u00f3 th\u1ec3 t\u0103ng c\u01b0\u1eddng kh\u1ea3 n\u0103ng ch\u1ed1ng t\u1eeb v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t.<\/li>\n<li><strong>\u00c1p d\u1ee5ng l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7<\/strong> \u2013 Epoxy, nickel-copper-nickel ho\u1eb7c c\u00e1c l\u1edbp ph\u1ee7 ch\u1ecbu nhi\u1ec7t cao kh\u00e1c c\u00f3 th\u1ec3 gi\u1ea3m oxy h\u00f3a v\u00e0 s\u1ef1 ph\u00e1 v\u1ee1 b\u1ec1 m\u1eb7t \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n<li><strong>T\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf l\u1eafp r\u00e1p<\/strong> \u2013 \u0110\u1eb7t nam ch\u00e2m xa ngu\u1ed3n nhi\u1ec7t tr\u1ef1c ti\u1ebfp ho\u1eb7c th\u00eam c\u00e1c r\u00e0o ch\u1eafn nhi\u1ec7t trong qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p.<\/li>\n<\/ul>\n<h3>M\u1eb9o l\u01b0u tr\u1eef v\u00e0 x\u1eed l\u00fd<\/h3>\n<ul>\n<li>Gi\u1eef nam ch\u00e2m trong m\u1ed9t <strong>kho\u1ea3ng kh\u00f4ng gian ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9<\/strong>, l\u00fd t\u01b0\u1edfng d\u01b0\u1edbi 140\u00b0F.<\/li>\n<li>Tr\u00e1nh l\u01b0u tr\u1eef ch\u00fang g\u1ea7n \u0111\u1ed9ng c\u01a1, l\u00f2 s\u01b0\u1edfi ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb t\u1ea1o nhi\u1ec7t kh\u00e1c.<\/li>\n<li>S\u1eed d\u1ee5ng h\u1ed9p \u0111\u1ef1ng c\u00f3 \u0111\u1ec7m, kh\u00f4ng ch\u1ee9a kim lo\u1ea1i \u0111\u1ec3 tr\u00e1nh v\u1ee1 do c\u0103ng th\u1eb3ng nhi\u1ec7t m\u1edf r\u1ed9ng.<\/li>\n<\/ul>\n<h3>Khi n\u00e0o n\u00ean xem x\u00e9t c\u00e1c l\u1ef1a ch\u1ecdn thay th\u1ebf<\/h3>\n<p>N\u1ebfu m\u00f4i tr\u01b0\u1eddng ho\u1ea1t \u0111\u1ed9ng th\u01b0\u1eddng v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 c\u1ee7a nam ch\u00e2m, c\u00f3 th\u1ec3 t\u1ed1t h\u01a1n \u0111\u1ec3:<\/p>\n<ul>\n<li>Chuy\u1ec3n sang <strong>Nam ch\u00e2m Samarium Cobalt<\/strong> \u2013 Ch\u00fang x\u1eed l\u00fd nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n v\u1edbi nguy c\u01a1 m\u1ea5t t\u1eeb th\u1ea5p h\u01a1n.<\/li>\n<li>S\u1eed d\u1ee5ng nam ch\u00e2m ferrite cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 chi ph\u00ed th\u1ea5p, \u0111\u1ed9 m\u1ea1nh trung b\u00ecnh trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t cao.<\/li>\n<li>K\u1ebft h\u1ee3p nam ch\u00e2m v\u1edbi <strong>ch\u1ea5t mang ho\u1eb7c gi\u00e1 \u0111\u1ee1 ph\u00e2n t\u00e1n nhi\u1ec7t<\/strong> \u0111\u1ec3 ph\u00e2n t\u00e1n t\u1ea3i nhi\u1ec7t.<\/li>\n<\/ul>\n<p>Vi\u1ec7c ch\u1ecdn \u0111\u00fang lo\u1ea1i v\u00e0 chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 ph\u00f9 h\u1ee3p ngay t\u1eeb \u0111\u1ea7u s\u1ebd gi\u1eef cho hi\u1ec7u su\u1ea5t t\u1eeb t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng l\u00e2u h\u01a1n.<\/p>\n<h2>Chuy\u00ean m\u00f4n c\u1ee7a NBAEM trong vi\u1ec7c cung c\u1ea5p nam ch\u00e2m Neodymium hi\u1ec7u su\u1ea5t cao<\/h2>\n<p>T\u1ea1i NBAEM, ch\u00fang t\u00f4i cung c\u1ea5p <strong>nam ch\u00e2m neodymium hi\u1ec7u su\u1ea5t cao<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 mang l\u1ea1i \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111\u1ed9 tin c\u1eady nh\u1ea5t qu\u00e1n, ngay c\u1ea3 khi ho\u1ea1t \u0111\u1ed9ng g\u1ea7n gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 t\u1ed1i \u0111a c\u1ee7a ch\u00fang. Ch\u00fang t\u00f4i bi\u1ebft r\u1eb1ng tr\u00ean th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam, nam ch\u00e2m th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi cao\u2014\u0111\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p, m\u00e1y ph\u00e1t \u0111i\u1ec7n, linh ki\u1ec7n xe \u0111i\u1ec7n, v\u00e0 \u0111i\u1ec7n t\u1eed chuy\u00ean d\u1ee5ng\u2014n\u01a1i m\u00e0 <strong>kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/strong> c\u00f3 th\u1ec3 quy\u1ebft \u0111\u1ecbnh th\u00e0nh c\u00f4ng ho\u1eb7c th\u1ea5t b\u1ea1i c\u1ee7a hi\u1ec7u su\u1ea5t.<\/p>\n<p>D\u00f2ng s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i bao g\u1ed3m <strong>c\u00e1c lo\u1ea1i v\u00e0 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111a d\u1ea1ng<\/strong>, t\u1eeb lo\u1ea1i ti\u00eau chu\u1ea9n N35 \u0111\u1ebfn c\u00e1c t\u00f9y ch\u1ecdn ch\u1ecbu nhi\u1ec7t cao c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c <strong>l\u00ean \u0111\u1ebfn 200\u00b0C<\/strong> m\u00e0 kh\u00f4ng m\u1ea5t \u0111i \u0111\u00e1ng k\u1ec3 t\u1eeb t\u00ednh. N\u1ebfu b\u1ea1n c\u1ea7n k\u00edch th\u01b0\u1edbc t\u00f9y ch\u1ec9nh, l\u1edbp ph\u1ee7 ho\u1eb7c h\u1ee3p kim pha tr\u1ed9n \u0111\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t, ch\u00fang t\u00f4i c\u00f3 th\u1ec3 s\u1ea3n xu\u1ea5t theo y\u00eau c\u1ea7u ch\u00ednh x\u00e1c c\u1ee7a b\u1ea1n.<\/p>\n<p>T\u1ea5t c\u1ea3 nam ch\u00e2m c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec1u tr\u1ea3i qua <strong>ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng nghi\u00eam ng\u1eb7t<\/strong>, bao g\u1ed3m c\u00e1c th\u1eed nghi\u1ec7m ch\u1ecbu nhi\u1ec7t, \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u00fang \u0111\u00e1p \u1ee9ng <strong>\u0111\u00e1nh gi\u00e1 nhi\u1ec7t \u0111\u1ed9 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/strong> v\u00e0 duy tr\u00ec \u0111\u1ed9 m\u1ea1nh t\u1eeb t\u00ednh theo th\u1eddi gian. Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p h\u01b0\u1edbng d\u1eabn v\u1ec1 <strong>l\u1ef1a ch\u1ecdn lo\u1ea1i ph\u00f9 h\u1ee3p<\/strong> cho m\u00f4i tr\u01b0\u1eddng c\u1ee7a b\u1ea1n \u0111\u1ec3 tr\u00e1nh <strong>hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t t\u1eeb t\u00ednh do nhi\u1ec7t<\/strong> v\u00e0 gi\u1ea3m thi\u1ec3u r\u1ee7i ro b\u1ea3o tr\u00ec.<\/p>\n<p>N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ki\u1ebfm nam ch\u00e2m c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u1ea3 <strong>\u0111i\u1ec7n n\u0103ng v\u00e0 nhi\u1ec7t \u0111\u1ed9<\/strong>, c\u00e1c k\u1ef9 s\u01b0 c\u1ee7a ch\u00fang t\u00f4i c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ch\u1ecdn gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u. T\u00ecm hi\u1ec3u th\u00eam v\u1ec1 hi\u1ec7u su\u1ea5t v\u1eadt li\u1ec7u trong <a href=\"https:\/\/nbaem.com\/fr\/guide-to-rare-earth-magnets\/\" target=\"_blank\" rel=\"noopener\">h\u01b0\u1edbng d\u1eabn v\u1ec1 nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm<\/a> ho\u1eb7c li\u00ean h\u1ec7 tr\u1ef1c ti\u1ebfp \u0111\u1ec3 \u0111\u01b0\u1ee3c <strong>t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed<\/strong> v\u1ec1 nhu c\u1ea7u \u1ee9ng d\u1ee5ng nhi\u1ec7t c\u1ee7a b\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u t\u00e1c d\u1ee5ng c\u1ee7a vi\u1ec7c l\u00e0m n\u00f3ng nam ch\u00e2m neodymium, gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9, r\u1ee7i ro m\u1ea5t t\u1eeb t\u00ednh v\u00e0 m\u1eb9o \u0111\u1ec3 n\u00e2ng cao kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/p>","protected":false},"author":1,"featured_media":2002,"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-2004","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\/Heat_Resistant_Neodymium_Magnets_AIzVFd9u1.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2004","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=2004"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2004\/revisions"}],"predecessor-version":[{"id":2008,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2004\/revisions\/2008"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/2002"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=2004"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=2004"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=2004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}