{"id":2809,"date":"2025-09-16T13:01:47","date_gmt":"2025-09-16T13:01:47","guid":{"rendered":"https:\/\/nbaem.com\/?p=2809"},"modified":"2025-09-19T07:03:43","modified_gmt":"2025-09-19T07:03:43","slug":"ndfeb-magnet-density","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/ndfeb-magnet-density\/","title":{"rendered":"\u0110\u1ed9 D\u00e0y Nam Ch\u00e2m NdFeB l\u00e0 g\u00ec"},"content":{"rendered":"<p>N\u1ebfu b\u1ea1n \u0111ang l\u00e0m vi\u1ec7c v\u1edbi <strong>nam ch\u00e2m NdFeB<\/strong>, hi\u1ec3u r\u00f5 v\u1ec1 <strong>\u0111\u1ed9 \u0111\u1eb7c<\/strong> kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t chi ti\u1ebft\u2014\u0111\u00f3 l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 thay \u0111\u1ed5i cu\u1ed9c ch\u01a1i. T\u1ea1i sao? B\u1edfi v\u00ec <strong>\u0111\u1ed9 \u0111\u1eb7c c\u1ee7a nam ch\u00e2m NdFeB<\/strong> tr\u1ef1c ti\u1ebfp \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t, \u0111\u1ed9 m\u1ea1nh v\u00e0 c\u00e1ch ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n. D\u00f9 b\u1ea1n l\u00e0 k\u1ef9 s\u01b0 thi\u1ebft k\u1ebf \u0111\u1ed9ng c\u01a1 ch\u00ednh x\u00e1c, ng\u01b0\u1eddi mua t\u00ecm ngu\u1ed3n v\u1eadt li\u1ec7u \u0111\u00e1ng tin c\u1eady, hay ng\u01b0\u1eddi \u0111am m\u00ea tinh ch\u1ec9nh d\u1ef1 \u00e1n, vi\u1ec7c hi\u1ec3u r\u00f5 v\u1ec1 <strong>\u0111\u1ed9 \u0111\u1eb7c c\u1ee7a nam ch\u00e2m NdFeB<\/strong> gi\u00fap b\u1ea1n \u0111\u01b0a ra nh\u1eefng l\u1ef1a ch\u1ecdn th\u00f4ng minh h\u01a1n. Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, ch\u00fang ta s\u1ebd \u0111i th\u1eb3ng v\u00e0o nh\u1eefng \u0111i\u1ec1u quan tr\u1ecdng v\u1ec1 \u0111\u1ed9 \u0111\u1eb7c\u2014c\u00e1ch \u0111o l\u01b0\u1eddng, l\u00fd do t\u1ea1i sao n\u00f3 bi\u1ebfn \u0111\u1ed5i, v\u00e0 \u00fd ngh\u0129a c\u1ee7a n\u00f3 \u0111\u1ed1i v\u1edbi s\u1ee9c m\u1ea1nh th\u1ef1c t\u1ebf c\u1ee7a nam ch\u00e2m. S\u1eb5n s\u00e0ng \u0111\u1ec3 n\u1eafm b\u1eaft c\u00e1c th\u00f4ng tin v\u1ec1 m\u1ed9t trong nh\u1eefng \u0111\u1eb7c t\u00ednh quan tr\u1ecdng nh\u1ea5t c\u1ee7a nh\u1eefng nam ch\u00e2m m\u1ea1nh m\u1ebd n\u00e0y ch\u01b0a? H\u00e3y b\u1eaft \u0111\u1ea7u n\u00e0o.<\/p>\n<h2>\u0110\u1ed9 D\u00e0y Nam Ch\u00e2m NdFeB l\u00e0 g\u00ec<\/h2>\n<p><strong>M\u1eadt \u0111\u1ed9<\/strong> Trong ng\u1eef c\u1ea3nh c\u1ee7a nam ch\u00e2m NdFeB, \u0111\u1ec1 c\u1eadp \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a v\u1eadt li\u1ec7u nam ch\u00e2m tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb th\u1ec3 t\u00edch, th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng gam tr\u00ean centimet kh\u1ed1i (g\/cm\u00b3). N\u00f3 ph\u1ea3n \u00e1nh m\u1ee9c \u0111\u1ed9 c\u00e1c nguy\u00ean t\u1eed \u0111\u01b0\u1ee3c \u0111\u00f3ng g\u00f3i ch\u1eb7t ch\u1ebd trong h\u1ee3p kim neodymium- s\u1eaft-boron, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u1ea3 tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m.<\/p>\n<h3>Ph\u1ea1m vi \u0111\u1ed9 \u0111\u1eb7c \u0111i\u1ec3n h\u00ecnh c\u1ee7a nam ch\u00e2m NdFeB<\/h3>\n<p>Nam ch\u00e2m NdFeB th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 \u0111\u1eb7c dao \u0111\u1ed9ng t\u1eeb <strong>7.4 \u0111\u1ebfn 7.6 g\/cm\u00b3<\/strong>, t\u00f9y thu\u1ed9c v\u00e0o th\u00e0nh ph\u1ea7n c\u1ee5 th\u1ec3 v\u00e0 quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u1ee7a ch\u00fang. \u0110\u1ed9 \u0111\u1eb7c n\u00e0y cao h\u01a1n nhi\u1ec1u v\u1eadt li\u1ec7u nam ch\u00e2m v\u0129nh c\u1eedu kh\u00e1c, g\u00f3p ph\u1ea7n v\u00e0o t\u00ednh ch\u1ea5t t\u1eeb m\u1ea1nh m\u1ebd c\u1ee7a ch\u00fang m\u1eb7c d\u00f9 k\u00edch th\u01b0\u1edbc kh\u00e1 nh\u1ecf.<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i nam ch\u00e2m<\/th>\n<th>\u0110\u1ed9 \u0111\u1eb7c \u0111i\u1ec3n h\u00ecnh (g\/cm\u00b3)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>NdFeB<\/td>\n<td>7.4 \u2013 7.6<\/td>\n<\/tr>\n<tr>\n<td>SmCo (Samari Cobalt)<\/td>\n<td>8.0 \u2013 8.4<\/td>\n<\/tr>\n<tr>\n<td>AlNiCo<\/td>\n<td>7.2 \u2013 7.4<\/td>\n<\/tr>\n<tr>\n<td>S\u1eaft ferrit<\/td>\n<td>5.0 \u2013 5.3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u1ed9 \u0111\u1eb7c v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh li\u00ean quan<\/h3>\n<ul>\n<li><strong>\u0110\u1ed9 \u0111\u1eb7c so v\u1edbi Kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch<\/strong>: Trong khi th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau, kh\u1ed1i l\u01b0\u1ee3ng th\u1ec3 t\u00edch c\u1ee5 th\u1ec3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ed5ng kh\u1ed1i l\u01b0\u1ee3ng tr\u00ean m\u1ed7i th\u1ec3 t\u00edch bao g\u1ed3m c\u1ea3 c\u00e1c kho\u1ea3ng tr\u1ed1ng ho\u1eb7c l\u1ed7 r\u1ed7ng, trong khi \u0111\u1ed9 \u0111\u1eb7c th\u01b0\u1eddng gi\u1ea3 \u0111\u1ecbnh l\u00e0 v\u1eadt li\u1ec7u r\u1eafn, \u0111\u1ed3ng nh\u1ea5t.<\/li>\n<li><strong>M\u1eadt \u0111\u1ed9 so v\u1edbi \u0110\u1ed9 t\u1eeb tr\u01b0\u1eddng c\u1ee7a t\u1eeb tr\u01b0\u1eddng<\/strong>: M\u1eadt \u0111\u1ed9 l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh v\u1eadt l\u00fd li\u00ean quan \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 th\u1ec3 t\u00edch, trong khi \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng (\u0111\u01b0\u1ee3c \u0111o b\u1eb1ng Tesla ho\u1eb7c Gauss) m\u00f4 t\u1ea3 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a tr\u01b0\u1eddng t\u1eeb do nam ch\u00e2m t\u1ea1o ra.<\/li>\n<li><strong>M\u1eadt \u0111\u1ed9 so v\u1edbi Tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 K\u00edch th\u01b0\u1edbc<\/strong>: M\u1eadt \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a nam ch\u00e2m nh\u01b0ng kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n<p>Hi\u1ec3u r\u00f5 v\u1ec1 m\u1eadt \u0111\u1ed9 c\u1ee7a nam ch\u00e2m NdFeB gi\u00fap thi\u1ebft k\u1ebf c\u00e1c nam ch\u00e2m nh\u1ecf g\u1ecdn, hi\u1ec7u qu\u1ea3 cho c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7u su\u1ea5t cao bao g\u1ed3m \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn v\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed. \u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t v\u00e0 \u0111\u1eb7c t\u00ednh v\u1eadt l\u00fd c\u1ee7a nam ch\u00e2m NdFeB, h\u00e3y truy c\u1eadp h\u01b0\u1edbng d\u1eabn c\u1ee7a NBAEM v\u1ec1 <a href=\"https:\/\/nbaem.com\/vi\/how-to-make-ndfeb-magnet\/\" target=\"_blank\" rel=\"noopener\"><strong><span style=\"color: #ff6600;\">c\u00e1ch l\u00e0m nam ch\u00e2m NdFeB<\/span><\/strong><\/a><strong><span style=\"color: #ff6600;\">.<\/span><\/strong><\/p>\n<h2>C\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1eadt \u0111\u1ed9 c\u1ee7a nam ch\u00e2m NdFeB<\/h2>\n<p>M\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 h\u00ecnh th\u00e0nh n\u00ean m\u1eadt \u0111\u1ed9 c\u1ee7a nam ch\u00e2m NdFeB, b\u1eaft \u0111\u1ea7u t\u1eeb th\u00e0nh ph\u1ea7n c\u1ee7a ch\u00fang. T\u1ec9 l\u1ec7 ch\u00ednh x\u00e1c c\u1ee7a neodymium, s\u1eaft, boron v\u00e0 c\u00e1c nguy\u00ean t\u1ed1 h\u1ee3p kim kh\u00e1c thay \u0111\u1ed5i tr\u1ecdng l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3 v\u00e0 \u0111\u1ed9 \u0111\u1eb7c c\u1ee7a nam ch\u00e2m. \u0110i\u1ec1u ch\u1ec9nh c\u00e1c t\u1ec9 l\u1ec7 n\u00e0y c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh m\u1eadt \u0111\u1ed9 \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee5 th\u1ec3.<\/p>\n<p>C\u00e1c b\u01b0\u1edbc s\u1ea3n xu\u1ea5t c\u0169ng \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng. C\u00e1c quy tr\u00ecnh nh\u01b0 nung ch\u1ea3y (sintering)\u2014n\u01a1i kim lo\u1ea1i d\u1ea1ng b\u1ed9t \u0111\u01b0\u1ee3c nung n\u00f3ng \u0111\u1ec3 h\u1ee3p nh\u1ea5t c\u00e1c h\u1ea1t\u2014v\u00e0 n\u00e9n ch\u1eb7t, gi\u00fap \u0111\u1ecbnh h\u00ecnh v\u1eadt li\u1ec7u, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1ee9c \u0111\u1ed9 ch\u1eb7t ch\u1ebd c\u1ee7a v\u1eadt li\u1ec7u nam ch\u00e2m. Sintering v\u00e0 n\u00e9n ch\u1eb7t hi\u1ec7u qu\u1ea3 h\u01a1n th\u01b0\u1eddng t\u1ea1o ra nam ch\u00e2m c\u00f3 m\u1eadt \u0111\u1ed9 cao h\u01a1n.<\/p>\n<p>T\u00ednh x\u1ed1p v\u00e0 c\u1ea5u tr\u00fac vi m\u00f4 c\u1ee7a nam ch\u00e2m c\u0169ng r\u1ea5t quan tr\u1ecdng. N\u1ebfu nam ch\u00e2m c\u00f3 c\u00e1c l\u1ed7 nh\u1ecf ho\u1eb7c khe h\u1edf b\u00ean trong, \u0111i\u1ec1u n\u00e0y l\u00e0m gi\u1ea3m m\u1eadt \u0111\u1ed9 v\u00ec nh\u1eefng kho\u1ea3ng tr\u1ed1ng \u0111\u00f3 chi\u1ebfm kh\u00f4ng gian m\u00e0 kh\u00f4ng l\u00e0m t\u0103ng tr\u1ecdng l\u01b0\u1ee3ng. C\u1ea5u tr\u00fac vi m\u00f4 c\u00e0ng m\u1ecbn v\u00e0 \u0111\u1ed3ng nh\u1ea5t, nam ch\u00e2m th\u01b0\u1eddng c\u00e0ng \u0111\u1eb7c v\u00e0 m\u1ea1nh h\u01a1n.<\/p>\n<p>C\u00f9ng nhau, c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y x\u00e1c \u0111\u1ecbnh m\u1eadt \u0111\u1ed9 v\u1eadt l\u00fd v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf.<\/p>\n<h2>M\u1ed1i quan h\u1ec7 gi\u1eefa m\u1eadt \u0111\u1ed9 v\u00e0 Hi\u1ec7u su\u1ea5t t\u1eeb tr\u01b0\u1eddng<\/h2>\n<p>M\u1eadt \u0111\u1ed9 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong c\u00e1ch nam ch\u00e2m NdFeB ho\u1ea1t \u0111\u1ed9ng. M\u1eadt \u0111\u1ed9 cao h\u01a1n c\u00f3 ngh\u0129a l\u00e0 \u00edt l\u1ed7 r\u1ed7ng v\u00e0 khe h\u1edf b\u00ean trong nam ch\u00e2m, \u0111i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb tr\u01b0\u1eddng ch\u00ednh nh\u01b0 \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng, \u0111\u1ed9 c\u1ee9ng t\u1eeb v\u00e0 n\u0103ng l\u01b0\u1ee3ng t\u00edch tr\u1eef.<\/p>\n<ul>\n<li><strong>\u0110\u1ed9 t\u1eeb tr\u01b0\u1eddng (Br)<\/strong> th\u01b0\u1eddng cao h\u01a1n \u1edf c\u00e1c nam ch\u00e2m c\u00f3 m\u1eadt \u0111\u1ed9 cao h\u01a1n, t\u1ea1o ra c\u00e1c tr\u01b0\u1eddng t\u1eeb m\u1ea1nh h\u01a1n.<\/li>\n<li><strong>Kh\u00e1ng t\u1eeb (kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb)<\/strong> c\u0169ng \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n v\u00ec c\u1ea5u tr\u00fac b\u00ean trong ch\u1eb7t ch\u1ebd h\u01a1n h\u1ed7 tr\u1ee3 s\u1ef1 \u1ed5n \u0111\u1ecbnh t\u1eeb tr\u01b0\u1eddng t\u1ed1t h\u01a1n.<\/li>\n<li><strong>N\u0103ng l\u01b0\u1ee3ng t\u00edch tr\u1eef (n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a l\u01b0u tr\u1eef)<\/strong>, m\u1ed9t th\u01b0\u1edbc \u0111o s\u1ee9c m\u1ea1nh v\u00e0 hi\u1ec7u qu\u1ea3 t\u1ed5ng th\u1ec3 c\u1ee7a nam ch\u00e2m, t\u0103ng l\u00ean khi v\u1eadt li\u1ec7u \u0111\u1eb7c h\u01a1n.<\/li>\n<\/ul>\n<p>Khi c\u00e1c \u0111\u1eb7c t\u00ednh n\u00e0y \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n, s\u1ee9c m\u1ea1nh v\u00e0 hi\u1ec7u qu\u1ea3 t\u1ed5ng th\u1ec3 c\u1ee7a nam ch\u00e2m c\u0169ng t\u0103ng l\u00ean. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 nam ch\u00e2m c\u00f3 th\u1ec3 cung c\u1ea5p nhi\u1ec1u c\u00f4ng su\u1ea5t h\u01a1n trong k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng trong c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7n \u0111\u1ea1i.<\/p>\n<p>V\u00ed d\u1ee5, trong c\u00e1c \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n v\u00e0 c\u1ea3m bi\u1ebfn, c\u00e1c nam ch\u00e2m NdFeB c\u00f3 m\u1eadt \u0111\u1ed9 cao h\u01a1n cung c\u1ea5p m\u00f4-men xo\u1eafn v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c t\u1ed1t h\u01a1n m\u00e0 kh\u00f4ng l\u00e0m t\u0103ng tr\u1ecdng l\u01b0\u1ee3ng ho\u1eb7c th\u1ec3 t\u00edch. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t trong c\u00e1c thi\u1ebft b\u1ecb nh\u1ecf g\u1ecdn v\u00e0 h\u1ec7 th\u1ed1ng hi\u1ec7u qu\u1ea3 cao th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ng\u00e0nh c\u00f4ng nghi\u1ec7p, t\u1eeb \u00f4 t\u00f4 \u0111\u1ebfn \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng.<\/p>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a nam ch\u00e2m v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a ch\u00fang, h\u00e3y xem <a href=\"https:\/\/nbaem.com\/vi\/what-is-permanent-magnet\/\" target=\"_blank\" rel=\"noopener\"><strong><span style=\"color: #ff6600;\">Magnet v\u0129nh c\u1eedu l\u00e0 g\u00ec<\/span><\/strong><\/a> \u0111\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n.<\/p>\n<h2>So s\u00e1nh m\u1eadt \u0111\u1ed9 nam ch\u00e2m NdFeB v\u1edbi c\u00e1c lo\u1ea1i nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm kh\u00e1c<\/h2>\n<p>Khi so s\u00e1nh m\u1eadt \u0111\u1ed9 c\u1ee7a nam ch\u00e2m NdFeB v\u1edbi c\u00e1c lo\u1ea1i nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm kh\u00e1c, r\u00f5 r\u00e0ng r\u1eb1ng nam ch\u00e2m NdFeB th\u01b0\u1eddng c\u00f3 m\u1eadt \u0111\u1ed9 cao h\u01a1n. C\u00e1c nam ch\u00e2m NdFeB \u0111i\u1ec3n h\u00ecnh c\u00f3 ph\u1ea1m vi m\u1eadt \u0111\u1ed9 kho\u1ea3ng 7,4 \u0111\u1ebfn 7,6 g\/cm\u00b3. Ng\u01b0\u1ee3c l\u1ea1i, nam ch\u00e2m Samarium Cobalt (SmCo) th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng t\u1eeb 7,7 \u0111\u1ebfn 8,4 g\/cm\u00b3, h\u01a1i d\u00e0y \u0111\u1eb7c h\u01a1n do th\u00e0nh ph\u1ea7n h\u1ee3p kim kh\u00e1c nhau. Nam ch\u00e2m AlNiCo \u00edt \u0111\u1eb7c h\u01a1n, th\u01b0\u1eddng kho\u1ea3ng 7,2 g\/cm\u00b3, trong khi nam ch\u00e2m Ferrite nh\u1eb9 h\u01a1n nhi\u1ec1u v\u1edbi m\u1eadt \u0111\u1ed9 g\u1ea7n 5,0 g\/cm\u00b3.<\/p>\n<p>M\u1ed7i lo\u1ea1i mang l\u1ea1i nh\u1eefng l\u1ee3i th\u1ebf ri\u00eang bi\u1ec7t trong s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p nh\u1edd nh\u1eefng kh\u00e1c bi\u1ec7t n\u00e0y:<\/p>\n<ul>\n<li><strong>nam ch\u00e2m NdFeB<\/strong> cung c\u1ea5p s\u1ef1 c\u00e2n b\u1eb1ng tuy\u1ec7t v\u1eddi gi\u1eefa s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng cao v\u00e0 m\u1eadt \u0111\u1ed9 v\u1eeba ph\u1ea3i, khi\u1ebfn ch\u00fang l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng nh\u1ecf g\u1ecdn, hi\u1ec7u su\u1ea5t cao nh\u01b0 \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n.<\/li>\n<li><strong>nam ch\u00e2m SmCo<\/strong>, m\u1eb7c d\u00f9 d\u00e0y \u0111\u1eb7c h\u01a1n, mang l\u1ea1i kh\u1ea3 n\u0103ng \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t h\u01a1n. M\u1eadt \u0111\u1ed9 cao h\u01a1n \u0111\u00f4i khi \u0111\u1ed3ng ngh\u0129a v\u1edbi c\u00e1c th\u00e0nh ph\u1ea7n n\u1eb7ng h\u01a1n trong m\u1ed9t s\u1ed1 thi\u1ebft k\u1ebf.<\/li>\n<li><strong>nam ch\u00e2m AlNiCo<\/strong> \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi hi\u1ec7u su\u1ea5t nhi\u1ec7t xu\u1ea5t s\u1eafc nh\u01b0ng s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng th\u1ea5p h\u01a1n v\u00e0 m\u1eadt \u0111\u1ed9 trung b\u00ecnh, ph\u00f9 h\u1ee3p t\u1ed1t trong c\u00e1c m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p \u0111\u1eb7c th\u00f9.<\/li>\n<li><strong>Nam ch\u00e2m ferrite<\/strong> l\u00e0 nh\u1eb9 nh\u1ea5t v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed nh\u1ea5t, nh\u01b0ng m\u1eadt \u0111\u1ed9 th\u1ea5p h\u01a1n c\u1ee7a ch\u00fang t\u01b0\u01a1ng \u1ee9ng v\u1edbi s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng y\u1ebfu h\u01a1n, h\u1ea1n ch\u1ebf kh\u1ea3 n\u0103ng s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng hi\u1ec7u qu\u1ea3 cao.<\/li>\n<\/ul>\n<p>Trong m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p, m\u1eadt \u0111\u1ed9 c\u1ee7a nam ch\u00e2m NdFeB ch\u1ee9ng t\u1ecf l\u1ee3i th\u1ebf trong vi\u1ec7c cung c\u1ea5p l\u1ef1c t\u1eeb m\u1ea1nh m\u1ebd trong c\u00e1c g\u00f3i nh\u1ecf h\u01a1n, nh\u1eb9 h\u01a1n. Tuy nhi\u00ean, m\u1eadt \u0111\u1ed9 cao h\u01a1n c\u0169ng c\u00f3 ngh\u0129a l\u00e0 nam ch\u00e2m c\u00f3 th\u1ec3 n\u1eb7ng h\u01a1n v\u00e0 d\u1ec5 v\u1ee1 h\u01a1n so v\u1edbi c\u00e1c l\u1ef1a ch\u1ecdn nh\u01b0 Ferrite. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t ph\u1ea3i c\u00e2n nh\u1eafc c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y d\u1ef1a tr\u00ean gi\u1edbi h\u1ea1n tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a \u1ee9ng d\u1ee5ng, nhu c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n v\u00e0 \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng.<\/p>\n<p>\u0110\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 vai tr\u00f2 c\u1ee7a nam ch\u00e2m trong c\u00f4ng ngh\u1ec7, h\u00e3y xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/permanent-magnet-applications-in-modern-technology\/\" target=\"_blank\" rel=\"noopener\">\u1ee8ng d\u1ee5ng nam ch\u00e2m v\u0129nh c\u1eedu trong c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i<\/a>.<\/span><\/strong><\/p>\n<h2>C\u00e1c \u1ee8ng d\u1ee5ng Trong \u0110\u00f3 M\u1eadt \u0110\u1ed9 Nam Ch\u00e2m NdFeB L\u00e0 Y\u1ebfu T\u1ed1 Quan Tr\u1ecdng<\/h2>\n<p>M\u1eadt \u0111\u1ed9 nam ch\u00e2m NdFeB \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p ch\u00ednh n\u01a1i hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 tin c\u1eady l\u00e0 t\u1ed1i c\u1ea7n thi\u1ebft. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 n\u01a1i m\u1eadt \u0111\u1ed9 th\u1ef1c s\u1ef1 quan tr\u1ecdng:<\/p>\n<ul>\n<li>\n<h3>Xe \u0111i\u1ec7n v\u00e0 di \u0111\u1ed9ng \u0111i\u1ec7n t\u1eed<\/h3>\n<p>Nam ch\u00e2m NdFeB m\u1eadt \u0111\u1ed9 cao \u0111\u1ea3m b\u1ea3o tr\u01b0\u1eddng t\u1eeb m\u1ea1nh h\u01a1n, c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 \u0111\u1ed9ng c\u01a1 v\u00e0 ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng. Trong \u0111\u1ed9ng c\u01a1 xe \u0111i\u1ec7n, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 nhi\u1ec1u c\u00f4ng su\u1ea5t h\u01a1n trong m\u1ed9t g\u00f3i nh\u1ecf h\u01a1n, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng cho c\u00e1c thi\u1ebft k\u1ebf xe nh\u1ecf g\u1ecdn, nh\u1eb9.<\/li>\n<li>\n<h3>N\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o bao g\u1ed3m Turbin gi\u00f3<\/h3>\n<p>M\u00e1y ph\u00e1t turbine gi\u00f3 d\u1ef1a v\u00e0o nam ch\u00e2m NdFeB m\u1eadt \u0111\u1ed9 cao \u0111\u1ec3 t\u1ed1i \u0111a h\u00f3a m\u1eadt \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng v\u00e0 s\u1ea3n l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng. Nam ch\u00e2m d\u00e0y \u0111\u1eb7c h\u01a1n gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a m\u00e1y ph\u00e1t, h\u1ed7 tr\u1ee3 tu\u1ed5i th\u1ecd turbine l\u00e2u h\u01a1n v\u00e0 s\u1ea3n xu\u1ea5t n\u0103ng l\u01b0\u1ee3ng t\u1ed1t h\u01a1n.<\/li>\n<li>\n<h3>Thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed v\u00e0 thi\u1ebft b\u1ecb ti\u00eau d\u00f9ng<\/h3>\n<p>T\u1eeb \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh \u0111\u1ebfn tai nghe, k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn v\u00e0 s\u1ee9c m\u1ea1nh cao c\u1ee7a nam ch\u00e2m NdFeB m\u1eadt \u0111\u1ed9 cao cho ph\u00e9p c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t t\u1ea1o ra c\u00e1c thi\u1ebft b\u1ecb nh\u1eb9 h\u01a1n, m\u1ea1nh m\u1ebd h\u01a1n m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m tu\u1ed5i th\u1ecd pin ho\u1eb7c tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<li>\n<h3>Thi\u1ebft b\u1ecb y t\u1ebf v\u00e0 c\u00f4ng ngh\u1ec7 h\u00ecnh \u1ea3nh<\/h3>\n<p>\u0110\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 tin c\u1eady l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u1edf \u0111\u00e2y. Nam ch\u00e2m NdFeB \u0111\u1eb7c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u00e1y MRI v\u00e0 thi\u1ebft b\u1ecb h\u00ecnh \u1ea3nh kh\u00e1c n\u01a1i c\u1ea7n tr\u01b0\u1eddng t\u1eeb m\u1ea1nh \u0111\u1ec3 t\u1ea1o ra h\u00ecnh \u1ea3nh ch\u1ea5t l\u01b0\u1ee3ng cao.<\/li>\n<li>\n<h3>Ng\u00e0nh c\u00f4ng nghi\u1ec7p h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 qu\u1ed1c ph\u00f2ng<\/h3>\n<p>Tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 y\u1ebfu t\u1ed1 l\u1edbn trong ng\u00e0nh h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5. S\u1eed d\u1ee5ng nam ch\u00e2m NdFeB c\u00f3 m\u1eadt \u0111\u1ed9 t\u1ed1i \u01b0u gi\u00fap gi\u1ea3m t\u1ed5ng tr\u1ecdng l\u01b0\u1ee3ng c\u00e1c th\u00e0nh ph\u1ea7n trong khi duy tr\u00ec ho\u1eb7c c\u1ea3i thi\u1ec7n s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng\u2014r\u1ea5t quan tr\u1ecdng cho c\u1ea3m bi\u1ebfn, b\u1ed9 truy\u1ec1n \u0111\u1ed9ng v\u00e0 \u0111i\u1ec7n t\u1eed li\u00ean quan \u0111\u1ebfn qu\u1ed1c ph\u00f2ng.<\/li>\n<\/ul>\n<p>M\u1ed7i \u1ee9ng d\u1ee5ng n\u00e0y \u0111\u1ec1u ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn m\u1eadt \u0111\u1ed9 nam ch\u00e2m \u0111\u1ec3 mang l\u1ea1i hi\u1ec7u su\u1ea5t h\u00e0ng \u0111\u1ea7u v\u00e0 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n nghi\u00eam ng\u1eb7t c\u1ee7a ng\u00e0nh. \u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 c\u00e1c th\u00e0nh ph\u1ea7n t\u1eeb trong \u0111\u1ed9ng c\u01a1, h\u00e3y xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/understanding-drone-motor-structure-and-magnetic-components\/\" target=\"_blank\" rel=\"noopener\">hi\u1ec3u c\u1ea5u tr\u00fac \u0111\u1ed9ng c\u01a1 drone v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n t\u1eeb<\/a>.<\/span><\/strong><\/p>\n<h2>Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 ki\u1ec3m tra m\u1eadt \u0111\u1ed9 nam ch\u00e2m t\u1ea1i NBAEM<\/h2>\n<p>T\u1ea1i NBAEM, \u0111\u1ea3m b\u1ea3o m\u1eadt \u0111\u1ed9 nam ch\u00e2m NdFeB nh\u1ea5t qu\u00e1n l\u00e0 \u01b0u ti\u00ean h\u00e0ng \u0111\u1ea7u. Quy tr\u00ecnh \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a ch\u00fang t\u00f4i bao g\u1ed3m ki\u1ec3m tra k\u1ef9 l\u01b0\u1ee1ng \u1edf m\u1ecdi giai \u0111o\u1ea1n s\u1ea3n xu\u1ea5t \u0111\u1ec3 duy tr\u00ec t\u00ednh ch\u1ea5t v\u1eadt l\u00fd \u0111\u1ed3ng nh\u1ea5t. S\u1ef1 nh\u1ea5t qu\u00e1n n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec m\u1eadt \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ee9c m\u1ea1nh v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a nam ch\u00e2m trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng.<\/p>\n<p>Ch\u00fang t\u00f4i s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb ti\u00ean ti\u1ebfn \u0111\u1ec3 \u0111o l\u01b0\u1eddng v\u00e0 ph\u00e2n t\u00edch ch\u00ednh x\u00e1c m\u1eadt \u0111\u1ed9 nam ch\u00e2m. C\u00e1c k\u1ef9 thu\u1eadt nh\u01b0 ph\u01b0\u01a1ng ph\u00e1p Archimedes v\u00e0 m\u00e1y qu\u00e9t \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao gi\u00fap ch\u00fang t\u00f4i ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c bi\u1ebfn th\u1ec3, l\u1ed7 r\u1ed7ng v\u00e0 c\u00e1c l\u1ed7i s\u1ea3n xu\u1ea5t. \u0110i\u1ec1u n\u00e0y cho ph\u00e9p ch\u00fang t\u00f4i cung c\u1ea5p s\u1ea3n ph\u1ea9m \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n m\u1eadt \u0111\u1ed9 ch\u1eb7t ch\u1ebd v\u00e0 ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi cao.<\/p>\n<p>NBAEM c\u0169ng tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n n\u1ed9i b\u1ed9 nghi\u00eam ng\u1eb7t v\u1ec1 m\u1eadt \u0111\u1ed9 v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh v\u1eadt l\u00fd li\u00ean quan. Cam k\u1ebft li\u00ean t\u1ee5c v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a ch\u00fang t\u00f4i bao g\u1ed3m hi\u1ec7u chu\u1ea9n \u0111\u1ecbnh k\u1ef3 thi\u1ebft b\u1ecb v\u00e0 \u0111\u00e0o t\u1ea1o li\u00ean t\u1ee5c cho \u0111\u1ed9i ng\u0169, \u0111\u1ea3m b\u1ea3o m\u1ed7i l\u00f4 nam ch\u00e2m NdFeB \u0111\u1ec1u \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ng\u00e0nh v\u00e0 mong \u0111\u1ee3i c\u1ee7a kh\u00e1ch h\u00e0ng. \u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 ki\u1ec3m tra \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m, b\u1ea1n c\u00f3 th\u1ec3 truy c\u1eadp h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/nbaem.com\/vi\/how-to-measure-magnet-strength\/\" target=\"_blank\" rel=\"noopener\">c\u00e1ch \u0111o \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m<\/a>.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 M\u1eadt \u0111\u1ed9 Nam ch\u00e2m NdFeB<\/h2>\n<h3>\u0110i\u1ec1u g\u00ec g\u00e2y ra s\u1ef1 bi\u1ebfn \u0111\u1ed5i v\u1ec1 m\u1eadt \u0111\u1ed9 trong nam ch\u00e2m NdFeB?<\/h3>\n<p>M\u1eadt \u0111\u1ed9 c\u00f3 th\u1ec3 thay \u0111\u1ed5i do s\u1ef1 kh\u00e1c bi\u1ec7t trong nguy\u00ean li\u1ec7u th\u00f4, th\u00e0nh ph\u1ea7n h\u1ee3p kim v\u00e0 quy tr\u00ecnh s\u1ea3n xu\u1ea5t nh\u01b0 nung k\u1ebft v\u00e0 n\u00e9n ch\u1eb7t. Ngay c\u1ea3 nh\u1eefng thay \u0111\u1ed5i nh\u1ecf trong c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u1eadt \u0111\u1ed9 cu\u1ed1i c\u00f9ng c\u1ee7a s\u1ea3n ph\u1ea9m v\u00e0 hi\u1ec7u su\u1ea5t t\u1eeb tr\u01b0\u1eddng.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111o ch\u00ednh x\u00e1c m\u1eadt \u0111\u1ed9 c\u1ee7a nam ch\u00e2m NdFeB?<\/h3>\n<p>C\u00e1c k\u1ef9 thu\u1eadt ti\u00ean ti\u1ebfn nh\u01b0 ph\u01b0\u01a1ng ph\u00e1p Archimedes v\u00e0 ch\u1ee5p c\u1eaft l\u1edbp tia X gi\u00fap \u0111\u1ea3m b\u1ea3o \u0111o l\u01b0\u1eddng ch\u00ednh x\u00e1c m\u1eadt \u0111\u1ed9, t\u00ednh \u0111\u1ebfn c\u00e1c l\u1ed7 r\u1ed7ng v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5u tr\u00fac vi m\u00f4. NBAEM s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i \u0111\u1ec3 duy tr\u00ec ch\u1ea5t l\u01b0\u1ee3ng nh\u1ea5t qu\u00e1n.<\/p>\n<h3>M\u1eadt \u0111\u1ed9 c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn thi\u1ebft k\u1ebf c\u1ee7a nam ch\u00e2m NdFeB kh\u00f4ng?<\/h3>\n<p>C\u00f3, m\u1eadt \u0111\u1ed9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ee9c m\u1ea1nh, k\u00edch th\u01b0\u1edbc v\u00e0 tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a nam ch\u00e2m. M\u1eadt \u0111\u1ed9 cao h\u01a1n th\u01b0\u1eddng c\u00f3 ngh\u0129a l\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb t\u1ed1t h\u01a1n, cho ph\u00e9p s\u1eed d\u1ee5ng nam ch\u00e2m nh\u1ecf h\u01a1n ho\u1eb7c nh\u1eb9 h\u01a1n trong c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 \u0111\u1ed9ng c\u01a1 v\u00e0 c\u1ea3m bi\u1ebfn m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m c\u00f4ng su\u1ea5t.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i ch\u1ecdn lo\u1ea1i m\u1eadt \u0111\u1ed9 ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a m\u00ecnh?<\/h3>\n<ul>\n<li><strong>Nam ch\u00e2m m\u1eadt \u0111\u1ed9 cao<\/strong> ph\u00f9 h\u1ee3p nh\u1ea5t cho c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u t\u1ed1i \u0111a v\u1ec1 s\u1ee9c m\u1ea1nh v\u00e0 hi\u1ec7u qu\u1ea3, nh\u01b0 xe \u0111i\u1ec7n ho\u1eb7c turbine gi\u00f3.<\/li>\n<li><strong>Nam ch\u00e2m m\u1eadt \u0111\u1ed9 ti\u00eau chu\u1ea9n<\/strong> ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec7n t\u1eed chung v\u00e0 thi\u1ebft b\u1ecb ti\u00eau d\u00f9ng n\u01a1i hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng.<\/li>\n<li><strong>C\u00e1c t\u00f9y ch\u1ecdn m\u1eadt \u0111\u1ed9 th\u1ea5p h\u01a1n<\/strong> c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf nh\u1eefng n\u01a1i ti\u1ebft ki\u1ec7m tr\u1ecdng l\u01b0\u1ee3ng l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t, nh\u01b0ng kh\u1ea3 n\u0103ng t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/li>\n<\/ul>\n<h3>T\u00f4i c\u00f3 th\u1ec3 nh\u1eadn c\u00e1c th\u00f4ng s\u1ed1 m\u1eadt \u0111\u1ed9 t\u00f9y ch\u1ec9nh kh\u00f4ng?<\/h3>\n<p>Ch\u1eafc ch\u1eafn r\u1ed3i. NBAEM cung c\u1ea5p c\u00e1c t\u00f9y ch\u1ecdn t\u00f9y ch\u1ec9nh \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c y\u00eau c\u1ea7u v\u1ec1 m\u1eadt \u0111\u1ed9 v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee5 th\u1ec3, \u0111\u1ea3m b\u1ea3o \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u01b0u.<\/p>\n<h2>Cam k\u1ebft c\u1ee7a NBAEM v\u1ec1 nam ch\u00e2m NdFeB ch\u1ea5t l\u01b0\u1ee3ng cao<\/h2>\n<p>T\u1ea1i NBAEM, ch\u00fang t\u00f4i t\u1eadp trung v\u00e0o vi\u1ec7c cung c\u1ea5p nam ch\u00e2m NdFeB v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 m\u1eadt \u0111\u1ed9 ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u \u0111a d\u1ea1ng c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p. D\u00f2ng s\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i bao g\u1ed3m nam ch\u00e2m neodymium ti\u00eau chu\u1ea9n v\u00e0 m\u1eadt \u0111\u1ed9 cao, mang l\u1ea1i s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u1ed9 b\u1ec1n cao.<\/p>\n<p>Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p d\u1ecbch v\u1ee5 t\u00f9y ch\u1ec9nh \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh m\u1eadt \u0111\u1ed9 v\u00e0 hi\u1ec7u su\u1ea5t t\u1eeb tr\u01b0\u1eddng d\u1ef1a tr\u00ean c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n, d\u00f9 \u0111\u00f3 l\u00e0 cho xe \u0111i\u1ec7n, \u0111i\u1ec7n t\u1eed hay c\u00e1c d\u1ef1 \u00e1n n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o. C\u00e1c gi\u1ea3i ph\u00e1p t\u00f9y ch\u1ec9nh c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ea3m b\u1ea3o b\u1ea1n c\u00f3 \u0111\u01b0\u1ee3c s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p gi\u1eefa tr\u1ecdng l\u01b0\u1ee3ng, k\u00edch th\u01b0\u1edbc v\u00e0 s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 c\u00e1c th\u00f4ng tin chi ti\u1ebft v\u1ec1 m\u1eadt \u0111\u1ed9 nam ch\u00e2m NdFeB, t\u00e1c \u0111\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng d\u00e0nh cho k\u1ef9 s\u01b0, nh\u00e0 mua h\u00e0ng v\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>","protected":false},"author":1,"featured_media":2850,"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-2809","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\/NdFeB_Magnet_Mechanical_Strength_zQfh2Gct3.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2809","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=2809"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2809\/revisions"}],"predecessor-version":[{"id":2958,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2809\/revisions\/2958"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/2850"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=2809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=2809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=2809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}