{"id":2045,"date":"2025-08-29T01:57:37","date_gmt":"2025-08-29T01:57:37","guid":{"rendered":"https:\/\/nbaem.com\/?p=2045"},"modified":"2025-08-29T02:11:06","modified_gmt":"2025-08-29T02:11:06","slug":"magnet-grades-pull-force-gauss-magnet-strength-and-n-numbers","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/magnet-grades-pull-force-gauss-magnet-strength-and-n-numbers\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn x\u1ebfp lo\u1ea1i nam ch\u00e2m, l\u1ef1c h\u00fat, c\u01b0\u1eddng \u0111\u1ed9 Gauss v\u00e0 s\u1ed1 N"},"content":{"rendered":"<h2>C\u00e1c lo\u1ea1i x\u1ebfp h\u1ea1ng nam ch\u00e2m l\u00e0 g\u00ec<\/h2>\n<p>C\u00e1c lo\u1ea1i x\u1ebfp h\u1ea1ng nam ch\u00e2m l\u00e0 c\u00e1ch ph\u00e2n lo\u1ea1i \u0111\u1ed9 m\u1ea1nh v\u00e0 \u0111\u1eb7c t\u00ednh v\u1eadt li\u1ec7u c\u1ee7a nam ch\u00e2m v\u0129nh c\u1eedu. V\u00ed d\u1ee5, c\u00e1c lo\u1ea1i x\u1ebfp h\u1ea1ng nam ch\u00e2m neodymium ph\u1ed5 bi\u1ebfn g\u1ed3m <strong>N35, N42, v\u00e0 N52<\/strong>, trong \u0111\u00f3 <strong>\u201cN\u201d<\/strong> \u0111\u1ea1i di\u1ec7n cho <em>nam ch\u00e2m neodymium<\/em>, v\u00e0 s\u1ed1 th\u1ec3 hi\u1ec7n <strong>s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a c\u1ee7a nam ch\u00e2m<\/strong> (BHmax) \u2014 m\u1ed9t th\u01b0\u1edbc \u0111o m\u1ee9c \u0111\u1ed9 l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng t\u1eeb c\u1ee7a v\u1eadt li\u1ec7u. N\u00f3i chung, <strong>s\u1ed1 c\u00e0ng cao th\u00ec nam ch\u00e2m c\u00e0ng m\u1ea1nh<\/strong>, gi\u1ea3 s\u1eed c\u00f9ng k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng.<\/p>\n<p>C\u1ea5p \u0111\u1ed9 kh\u00f4ng ch\u1ec9 ph\u1ea3n \u00e1nh <strong>\u0111\u1ed9 m\u1ea1nh t\u1eeb tr\u01b0\u1eddng<\/strong> m\u00e0 c\u00f2n <strong>th\u00e0nh ph\u1ea7n v\u1eadt li\u1ec7u<\/strong> v\u00e0 \u0111\u1eb7c t\u00ednh hi\u1ec7u su\u1ea5t, bao g\u1ed3m kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb t\u00ednh.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 t\u1ed5ng quan nhanh v\u1ec1 c\u00e1c lo\u1ea1i nam ch\u00e2m ph\u1ed5 bi\u1ebfn v\u00e0 c\u1ea5p \u0111\u1ed9 \u0111i\u1ec3n h\u00ecnh c\u1ee7a ch\u00fang:<\/p>\n<ul>\n<li><strong>Neodymium (NdFeB)<\/strong> \u2013 Nam ch\u00e2m v\u0129nh c\u1eedu th\u01b0\u01a1ng m\u1ea1i m\u1ea1nh nh\u1ea5t; c\u00e1c c\u1ea5p \u0111\u1ed9 th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb <strong>N35 \u0111\u1ebfn N52<\/strong>.<\/li>\n<li><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/products\/ceramic-magnet\/\" target=\"_blank\" rel=\"noopener\"><strong>Ferrite (G\u1ed1m)<\/strong> <\/a><\/span>\u2013 Hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed v\u00e0 ch\u1ed1ng \u0103n m\u00f2n; c\u00e1c c\u1ea5p nh\u01b0 <strong>C5 ho\u1eb7c C8<\/strong>.<\/li>\n<li><strong>Alnico<\/strong> \u2013 \u0110\u1ed9 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t tuy\u1ec7t v\u1eddi, ph\u00f9 h\u1ee3p cho c\u00e1c \u1ee9ng d\u1ee5ng nhi\u1ec7t \u0111\u1ed9 cao; c\u00e1c c\u1ea5p nh\u01b0 <strong>Alnico 5<\/strong> or <strong>Alnico 8<\/strong>.<\/li>\n<li><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/products\/samarium-cobalt-magnets\/\" target=\"_blank\" rel=\"noopener\"><strong>Cobalt Samari (SmCo)<\/strong> <\/a><\/span>\u2013 \u0110\u1ed9 b\u1ec1n cao v\u1edbi kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n v\u01b0\u1ee3t tr\u1ed9i; c\u00e1c lo\u1ea1i ph\u1ed5 bi\u1ebfn t\u1eeb <strong>SmCo 16 \u0111\u1ebfn SmCo 32<\/strong>.<\/li>\n<\/ul>\n<p>Hi\u1ec3u r\u00f5 c\u00e1c lo\u1ea1i magnet gi\u00fap ch\u1ecdn \u0111\u00fang v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n \u2014 d\u00f9 b\u1ea1n c\u1ea7n \u0111\u1ed9 m\u1ea1nh t\u1ed1i \u0111a, kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao, ti\u1ebft ki\u1ec7m chi ph\u00ed hay \u0111\u1ed9 b\u1ec1n trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/p>\n<h2>Hi\u1ec3u r\u00f5 l\u1ef1c h\u00fat, \u00fd ngh\u0129a v\u00e0 t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/magnet_pull_force_measurement_j0MTvbaS9.webp\" alt=\"\u0111o l\u1ef1c h\u00fat c\u1ee7a nam ch\u00e2m\" \/><\/p>\n<p>L\u1ef1c k\u00e9o l\u00e0 l\u01b0\u1ee3ng tr\u1ecdng l\u01b0\u1ee3ng m\u1ed9t nam ch\u00e2m c\u00f3 th\u1ec3 gi\u1eef tr\u01b0\u1edbc khi t\u00e1ch kh\u1ecfi b\u1ec1 m\u1eb7t th\u00e9p. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng <strong>pound<\/strong> or <strong>kilogram<\/strong>. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch th\u1ef1c t\u1ebf nh\u1ea5t \u0111\u1ec3 so s\u00e1nh s\u1ee9c m\u1ea1nh c\u1ee7a nam ch\u00e2m v\u00ec n\u00f3 ph\u1ea3n \u00e1nh kh\u1ea3 n\u0103ng gi\u1eef th\u1ef1c t\u1ebf ch\u1ee9 kh\u00f4ng ch\u1ec9 c\u00e1c ph\u00e9p \u0111o trong ph\u00f2ng th\u00ed nghi\u1ec7m.<\/p>\n<p>L\u1ef1c k\u00e9o ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 ch\u00ednh:<\/p>\n<ul>\n<li><strong>K\u00edch th\u01b0\u1edbc nam ch\u00e2m<\/strong> \u2013 Nam ch\u00e2m l\u1edbn h\u01a1n th\u01b0\u1eddng c\u00f3 kh\u1ea3 n\u0103ng gi\u1eef t\u1ed1t h\u01a1n.<\/li>\n<li><strong>C\u1ea5p \u0111\u1ed9 nam ch\u00e2m (s\u1ed1 N)<\/strong> \u2013 C\u00e1c lo\u1ea1i cao h\u01a1n nh\u01b0 N52 c\u00f3 th\u1ec3 t\u1ea1o ra l\u1ef1c k\u00e9o l\u1edbn h\u01a1n so v\u1edbi c\u00e1c lo\u1ea1i th\u1ea5p h\u01a1n nh\u01b0 N35, c\u00f9ng k\u00edch th\u01b0\u1edbc.<\/li>\n<li><strong>B\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac<\/strong> \u2013 Th\u00e9p m\u1ecbn, s\u1ea1ch s\u1ebd cho l\u1ef1c k\u00e9o cao nh\u1ea5t. B\u1ea5t k\u1ef3 khe h\u1edf, l\u1edbp s\u01a1n ho\u1eb7c r\u1ec9 s\u00e9t n\u00e0o c\u0169ng s\u1ebd l\u00e0m gi\u1ea3m l\u1ef1c k\u00e9o.<\/li>\n<\/ul>\n<p>Trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p, x\u1ebfp h\u1ea1ng l\u1ef1c k\u00e9o quan tr\u1ecdng cho c\u00e1c c\u00f4ng vi\u1ec7c nh\u01b0 <strong>n\u00e2ng c\u00e1c t\u1ea5m th\u00e9p n\u1eb7ng, c\u1ed1 \u0111\u1ecbnh d\u1ee5ng c\u1ee5 ho\u1eb7c gi\u1eef ch\u1eb7t c\u00e1c thi\u1ebft b\u1ecb<\/strong> t\u1ea1i ch\u1ed7. \u0110\u1ed1i v\u1edbi s\u1eed d\u1ee5ng trong ti\u00eau d\u00f9ng, n\u00f3 c\u0169ng quan tr\u1ecdng \u2014 v\u00ed d\u1ee5, <strong>g\u1eafn v\u1eadt d\u1ee5ng, x\u00e2y d\u1ef1ng c\u00e1c kh\u00f3a t\u1eeb ho\u1eb7c d\u1ef1 \u00e1n t\u1ef1 s\u1eeda ch\u1eefa t\u1ea1i nh\u00e0<\/strong>.<\/p>\n<p>Khi b\u1ea1n ki\u1ec3m tra th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a nam ch\u00e2m, h\u00e3y nh\u1edb r\u1eb1ng: l\u1ef1c h\u00fat \u0111\u01b0\u1ee3c ghi r\u00f5 th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111o trong \u0111i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m l\u00fd t\u01b0\u1edfng. Trong th\u1ef1c t\u1ebf s\u1eed d\u1ee5ng, l\u1ef1c gi\u1eef th\u1ef1c t\u1ebf c\u00f3 th\u1ec3 th\u1ea5p h\u01a1n do \u0111i\u1ec1u ki\u1ec7n b\u1ec1 m\u1eb7t ho\u1eb7c kho\u1ea3ng c\u00e1ch th\u00eam v\u00e0o. N\u1ebfu d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n c\u1ea7n m\u1ed9t l\u1ef1c gi\u1eef c\u1ee5 th\u1ec3, h\u00e3y d\u00f9ng \u0111\u00e1nh gi\u00e1 l\u1ef1c h\u00fat l\u00e0m h\u01b0\u1edbng d\u1eabn v\u00e0 c\u1ed9ng th\u00eam m\u1ed9t kho\u1ea3ng an to\u00e0n.<\/p>\n<h2>C\u01b0\u1eddng \u0111\u1ed9 nam ch\u00e2m Gauss, \u0111o l\u01b0\u1eddng tr\u01b0\u1eddng t\u1eeb<\/h2>\n<p><strong>Gauss<\/strong> l\u00e0 m\u1ed9t \u0111\u01a1n v\u1ecb cho bi\u1ebft m\u1ee9c \u0111\u1ed9 m\u1ea1nh c\u1ee7a tr\u01b0\u1eddng t\u1eeb t\u1ea1i m\u1ed9t \u0111i\u1ec3m c\u1ee5 th\u1ec3. Khi \u0111o \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m, ch\u00fang ta th\u01b0\u1eddng xem x\u00e9t hai gi\u00e1 tr\u1ecb ch\u00ednh:<\/p>\n<ul>\n<li><strong>Gauss b\u1ec1 m\u1eb7t<\/strong> \u2013 tr\u01b0\u1eddng t\u1eeb \u0111o ch\u00ednh x\u00e1c tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a nam ch\u00e2m b\u1eb1ng m\u00e1y \u0111o gauss.<\/li>\n<li><strong>M\u1eadt \u0111\u1ed9 t\u1eeb d\u01b0 (Br)<\/strong> \u2013 n\u0103ng l\u01b0\u1ee3ng t\u1eeb t\u1ed1i \u0111a m\u00e0 v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 gi\u1eef, \u0111o b\u1eb1ng kilogauss (kG) ho\u1eb7c Tesla (T) trong ph\u00f2ng th\u00ed nghi\u1ec7m.<\/li>\n<\/ul>\n<p>Gauss b\u1ec1 m\u1eb7t l\u00e0 gi\u00e1 tr\u1ecb b\u1ea1n s\u1ebd th\u1ea5y trong c\u00e1c ph\u00e9p \u0111o th\u1ef1c t\u1ebf, trong khi Br l\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u d\u00f9ng \u0111\u1ec3 so s\u00e1nh c\u00e1c lo\u1ea1i trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n<h3>T\u1ea1i sao Gauss l\u1ea1i quan tr\u1ecdng<\/h3>\n<p>C\u00e1c ph\u00e9p \u0111o gauss gi\u00fap b\u1ea1n:<\/p>\n<ul>\n<li>So s\u00e1nh \u0111\u1ed9 m\u1ea1nh c\u1ee7a nam ch\u00e2m tr\u01b0\u1edbc khi mua<\/li>\n<li>Ph\u00f9 h\u1ee3p nam ch\u00e2m ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n<\/li>\n<li>\u01af\u1edbc l\u01b0\u1ee3ng l\u1ef1c gi\u1eef c\u00f9ng v\u1edbi k\u00edch th\u01b0\u1edbc v\u00e0 lo\u1ea1i<\/li>\n<\/ul>\n<p>\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p, \u0111i\u1ec7n t\u1eed, \u0111\u1ed9ng c\u01a1 v\u00e0 c\u1ea3m bi\u1ebfn t\u1eeb, n\u01a1i m\u00e0 \u0111\u1ed9 m\u1ea1nh c\u1ee7a tr\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn hi\u1ec7u su\u1ea5t.<\/p>\n<h3>Gauss b\u1ec1 m\u1eb7t \u0111i\u1ec3n h\u00ecnh theo lo\u1ea1i nam ch\u00e2m<\/h3>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i nam ch\u00e2m<\/th>\n<th>Ph\u1ea1m vi lo\u1ea1i ph\u1ed5 bi\u1ebfn<\/th>\n<th>Kho\u1ea3ng. Gauss b\u1ec1 m\u1eb7t*<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Neodymi<\/td>\n<td>N35 \u2013 N52<\/td>\n<td>2.000 \u2013 6.000 G<\/td>\n<\/tr>\n<tr>\n<td>Ferrite (G\u1ed1m)<\/td>\n<td>C5 \u2013 C8<\/td>\n<td>1.500 \u2013 3.900 G<\/td>\n<\/tr>\n<tr>\n<td>Samari C\u00f4ban<\/td>\n<td>18 \u2013 30<\/td>\n<td>2.000 \u2013 5.000 G<\/td>\n<\/tr>\n<tr>\n<td>Alnico<\/td>\n<td>2 \u2013 9<\/td>\n<td>800 \u2013 1.200 G<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>*\u0110\u1ed9 t\u1eeb tr\u01b0\u1eddng b\u1ec1 m\u1eb7t thay \u0111\u1ed5i theo k\u00edch th\u01b0\u1edbc, h\u00ecnh d\u1ea1ng v\u00e0 s\u1eafp x\u1ebfp c\u1ef1c.<\/p>\n<h2>Gi\u1ea3i m\u00e3 c\u00e1c s\u1ed1 N, \u00fd ngh\u0129a c\u1ee7a ch\u00fang<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/08\/Neodymium_Magnet_N_Grades_Guide_x0GfgyQrA.webp\" alt=\"H\u01b0\u1edbng d\u1eabn c\u00e1c lo\u1ea1i nam ch\u00e2m N c\u1ee7a Neodymium\" \/><\/p>\n<p>Khi b\u1ea1n mua nam ch\u00e2m neodymium, b\u1ea1n th\u01b0\u1eddng s\u1ebd th\u1ea5y c\u00e1c c\u1ea5p \u0111\u1ed9 nh\u01b0 <strong>N35, N42, N52<\/strong>. Nh\u1eefng <strong>s\u1ed1 N<\/strong> cho bi\u1ebft \u0111\u1ed9 m\u1ea1nh c\u1ee7a v\u1eadt li\u1ec7u nam ch\u00e2m. \u201cN\u201d \u0111\u1ea1i di\u1ec7n cho neodymium, v\u00e0 s\u1ed1 th\u1ec3 hi\u1ec7n <strong>s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a (BHmax)<\/strong> \u2014 v\u1ec1 c\u01a1 b\u1ea3n, l\u01b0\u1ee3ng n\u0103ng l\u01b0\u1ee3ng t\u1eeb m\u00e0 v\u1eadt li\u1ec7u c\u00f3 th\u1ec3 l\u01b0u tr\u1eef. S\u1ed1 cao h\u01a1n c\u00f3 ngh\u0129a l\u00e0 kh\u1ea3 n\u0103ng h\u00fat m\u1ea1nh h\u01a1n, gi\u1ea3 s\u1eed c\u00f9ng k\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng.<\/p>\n<p>V\u00ed d\u1ee5:<\/p>\n<ul>\n<li><strong>N35<\/strong> l\u00e0 c\u1ea5p \u0111\u1ed9 ti\u1ebft ki\u1ec7m chi ph\u00ed h\u01a1n cho s\u1eed d\u1ee5ng chung.<\/li>\n<li><strong>N42<\/strong> cung c\u1ea5p c\u00e2n b\u1eb1ng gi\u1eefa \u0111\u1ed9 m\u1ea1nh v\u00e0 gi\u00e1 c\u1ea3.<\/li>\n<li><strong>N52<\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng c\u1ea5p \u0111\u1ed9 m\u1ea1nh nh\u1ea5t trong s\u1ea3n xu\u1ea5t ti\u00eau chu\u1ea9n \u2014 l\u00fd t\u01b0\u1edfng khi b\u1ea1n c\u1ea7n l\u1ef1c t\u1ed1i \u0111a trong kh\u00f4ng gian nh\u1ecf.<\/li>\n<\/ul>\n<p>S\u1ed1 N c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t:<\/p>\n<ul>\n<li><strong>L\u1ef1c k\u00e9o m\u1ea1nh<\/strong> \u2013 C\u00e1c c\u1ea5p \u0111\u1ed9 N cao h\u01a1n cung c\u1ea5p l\u1ef1c k\u00e9o m\u1ea1nh h\u01a1n cho c\u00f9ng m\u1ed9t k\u00edch th\u01b0\u1edbc nam ch\u00e2m.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/strong> \u2013 Nam ch\u00e2m N ti\u00eau chu\u1ea9n b\u1eaft \u0111\u1ea7u m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh khi nhi\u1ec7t \u0111\u1ed9 tr\u00ean 80\u00b0C (176\u00b0F). \u0110\u1ed1i v\u1edbi nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n, b\u1ea1n c\u1ea7n c\u00e1c lo\u1ea1i cao c\u1ea5p ch\u1ecbu nhi\u1ec7t \u0111\u1eb7c bi\u1ec7t nh\u01b0 N42SH ho\u1eb7c N35EH.<\/li>\n<li><strong>\u0110\u1ed9 b\u1ec1n<\/strong> \u2013 L\u1edbp ph\u1ee7 (nickel, epoxy, v.v.) b\u1ea3o v\u1ec7 ch\u1ed1ng \u0103n m\u00f2n, kh\u00f4ng ph\u1ea3i c\u1ea5p \u0111\u1ed9 N t\u1ef1 n\u00f3 \u2014 nh\u01b0ng nam ch\u00e2m cao c\u1ea5p h\u01a1n v\u1eabn c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd c\u1ea9n th\u1eadn v\u00ec ch\u00fang d\u1ec5 v\u1ee1.<\/li>\n<\/ul>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1i nh\u00ecn nhanh v\u1ec1 c\u00e1c c\u1ea5p \u0111\u1ed9 N ph\u1ed5 bi\u1ebfn v\u00e0 \u00fd ngh\u0129a c\u1ee7a ch\u00fang:<\/p>\n<table>\n<thead>\n<tr>\n<th><strong>C\u1ea5p \u0111\u1ed9<\/strong><\/th>\n<th><strong>BHmax (MGOe)<\/strong><\/th>\n<th><strong>C\u01b0\u1eddng \u0111\u1ed9 t\u01b0\u01a1ng \u0111\u1ed1i<\/strong><\/th>\n<th><strong>S\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>N35<\/td>\n<td>33\u201335<\/td>\n<td>Ti\u00eau chu\u1ea9n<\/td>\n<td>Th\u1ee7 c\u00f4ng, \u0111\u00e8n chi\u1ebfu s\u00e1ng<\/td>\n<\/tr>\n<tr>\n<td>N42<\/td>\n<td>40\u201342<\/td>\n<td>M\u1ea1nh m\u1ebd<\/td>\n<td>D\u1ee5ng c\u1ee5, s\u1ea3n ph\u1ea9m ti\u00eau d\u00f9ng<\/td>\n<\/tr>\n<tr>\n<td>N48<\/td>\n<td>46\u201348<\/td>\n<td>R\u1ea5t m\u1ea1nh<\/td>\n<td>\u0110\u1ed9ng c\u01a1, thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p<\/td>\n<\/tr>\n<tr>\n<td>N52<\/td>\n<td>50\u201353<\/td>\n<td>T\u1ed1i \u0111a ti\u00eau chu\u1ea9n<\/td>\n<td>K\u1eb9p t\u1eeb, thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Hi\u1ec3u c\u00e1c s\u1ed1 N gi\u00fap b\u1ea1n ph\u00f9 h\u1ee3p <strong>c\u1ea5p \u0111\u1ed9 nam ch\u00e2m neodymium<\/strong> v\u1edbi nhu c\u1ea7u l\u1ef1c k\u00e9o, nhi\u1ec7t \u0111\u1ed9 l\u00e0m vi\u1ec7c v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n. Ch\u1ecdn \u0111\u00fang lo\u1ea1i gi\u00fap b\u1ea1n \u0111\u1ea1t hi\u1ec7u su\u1ea5t m\u00e0 kh\u00f4ng chi ti\u00eau qu\u00e1 m\u1ee9c.<\/p>\n<h2>\u1ea2nh h\u01b0\u1edfng c\u1ee7a x\u1ebfp h\u1ea1ng nam ch\u00e2m \u0111\u1ebfn hi\u1ec7u su\u1ea5t, \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf<\/h2>\n<p>C\u1ea5p \u0111\u1ed9 nam ch\u00e2m t\u1ea1o ra s\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn trong hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m, \u0111\u1eb7c bi\u1ec7t v\u1ec1 \u0111\u1ed9 m\u1ea1nh, \u0111\u1ed9 b\u1ec1n v\u00e0 ph\u00f9 h\u1ee3p cho c\u00e1c c\u00f4ng vi\u1ec7c c\u1ee5 th\u1ec3. \u1ede Vi\u1ec7t Nam, c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p ch\u1ecdn c\u1ea5p \u0111\u1ed9 d\u1ef1a tr\u00ean nhu c\u1ea7u hi\u1ec7u su\u1ea5t v\u00e0 \u0111i\u1ec1u ki\u1ec7n ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<p>V\u00ed d\u1ee5:<\/p>\n<ul>\n<li><strong>\u0110\u1ed9ng c\u01a1 v\u00e0 m\u00e1y ph\u00e1t \u0111i\u1ec7n<\/strong> \u2013 Neodymium cao c\u1ea5p nh\u01b0 <strong>N52<\/strong> th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c thi\u1ebft k\u1ebf nh\u1ecf g\u1ecdn y\u00eau c\u1ea7u m\u00f4-men xo\u1eafn t\u1ed1i \u0111a trong kh\u00f4ng gian nh\u1ecf.<\/li>\n<li><strong>C\u1ea3m bi\u1ebfn v\u00e0 T\u1ef1 \u0111\u1ed9ng h\u00f3a<\/strong> \u2013 C\u00e1c lo\u1ea1i c\u1ea5p th\u1ea5p h\u01a1n nh\u01b0 <strong>N35 ho\u1eb7c N38<\/strong> \u0111\u1ee7 \u0111\u1ec3 c\u1ea3m bi\u1ebfn ch\u00ednh x\u00e1c m\u00e0 kh\u00f4ng qu\u00e1 m\u1ea1nh g\u00e2y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c th\u00e0nh ph\u1ea7n l\u00e2n c\u1eadn.<\/li>\n<li><strong>B\u1ed9 ph\u00e2n t\u00e1ch t\u1eeb<\/strong> \u2013 C\u00e1c b\u1ed9 ph\u00e2n t\u00e1ch c\u00f4ng nghi\u1ec7p c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng <strong>N42\u2013N50<\/strong> \u0111\u1ec3 t\u1ea1o l\u1ef1c k\u00e9o m\u1ea1nh m\u1ebd nh\u1eb1m lo\u1ea1i b\u1ecf c\u00e1c t\u1ea1p ch\u1ea5t kim lo\u1ea1i tr\u00ean b\u0103ng chuy\u1ec1n.<\/li>\n<li><strong>\u0110i\u1ec7n t\u1eed<\/strong> \u2013 C\u00e1c thi\u1ebft b\u1ecb nh\u01b0 loa, \u1ed5 c\u1ee9ng, v\u00e0 b\u1ed9 s\u1ea1c kh\u00f4ng d\u00e2y th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c c\u1ea5p N t\u00f9y ch\u1ec9nh \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u qu\u1ea3 v\u00e0 ph\u00f9 h\u1ee3p k\u00edch th\u01b0\u1edbc.<\/li>\n<li><strong>D\u1ef1 \u00e1n t\u1ef1 l\u00e0m v\u00e0 s\u1edf th\u00edch<\/strong> \u2013 Ng\u01b0\u1eddi s\u00e1ng t\u1ea1o c\u00f3 th\u1ec3 ch\u1ecdn <strong>N35 ho\u1eb7c N42<\/strong> \u0111\u1ec3 ti\u1ebft ki\u1ec7m chi ph\u00ed khi kh\u00f4ng c\u1ea7n l\u1ef1c k\u00e9o c\u1ef1c l\u1edbn.<\/li>\n<\/ul>\n<p>Vi\u1ec7c ph\u00f9 h\u1ee3p gi\u1eefa c\u1ea5p t\u1eeb v\u00e0 \u1ee9ng d\u1ee5ng l\u00e0 ch\u00eca kh\u00f3a. M\u1ed9t s\u1ed1 N cao h\u01a1n kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng t\u1ed1t h\u01a1n\u2014qu\u00e1 m\u1ea1nh c\u00f3 th\u1ec3 g\u00e2y kh\u00f3 kh\u0103n trong x\u1eed l\u00fd, h\u00fat c\u00e1c v\u1eadt kh\u00f4ng mong mu\u1ed1n ho\u1eb7c th\u1eadm ch\u00ed l\u00e0m h\u1ecfng thi\u1ebft b\u1ecb. C\u1ea5p ph\u00f9 h\u1ee3p c\u00e2n b\u1eb1ng gi\u1eefa l\u1ef1c h\u00fat, c\u01b0\u1eddng \u0111\u1ed9 gauss, kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t v\u00e0 chi ph\u00ed cho c\u00f4ng vi\u1ec7c c\u1ee5 th\u1ec3.<\/p>\n<h2>C\u00e1c y\u1ebfu t\u1ed1 kh\u00e1c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ee9c m\u1ea1nh v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m<\/h2>\n<p>C\u1ea5p t\u1eeb v\u00e0 lo\u1ea1i t\u1eeb l\u00e0 quan tr\u1ecdng, nh\u01b0ng ch\u00fang ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a c\u00e2u chuy\u1ec7n. M\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 kh\u00e1c \u0111\u00f3ng vai tr\u00f2 l\u1edbn trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 m\u1ea1nh th\u1ef1c s\u1ef1 c\u1ee7a nam ch\u00e2m trong s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf.<\/p>\n<p><strong>1. K\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u1ea1ng<\/strong><\/p>\n<ul>\n<li>Nam ch\u00e2m l\u1edbn h\u01a1n th\u01b0\u1eddng c\u00f3 l\u1ef1c h\u00fat m\u1ea1nh h\u01a1n v\u00ec ch\u00fang c\u00f3 nhi\u1ec1u v\u1eadt li\u1ec7u t\u1ea1o ra tr\u01b0\u1eddng h\u01a1n.<\/li>\n<li>H\u00ecnh d\u1ea1ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch ph\u00e2n b\u1ed1 tr\u01b0\u1eddng. V\u00ed d\u1ee5, m\u1ed9t \u0111\u0129a m\u1ecfng s\u1ebd kh\u00f4ng h\u00fat c\u00f9ng c\u00e1ch nh\u01b0 m\u1ed9t kh\u1ed1i d\u00e0y, ngay c\u1ea3 khi ch\u00fang c\u00f9ng c\u1ea5p.<\/li>\n<\/ul>\n<p><strong>2. L\u1edbp ph\u1ee7<\/strong><\/p>\n<ul>\n<li>L\u1edbp ph\u1ee7 (nh\u01b0 nickel, epoxy ho\u1eb7c cao su) b\u1ea3o v\u1ec7 nam ch\u00e2m kh\u1ecfi r\u1ec9 s\u00e9t v\u00e0 m\u00e0i m\u00f2n v\u1eadt l\u00fd, \u0111\u1eb7c bi\u1ec7t l\u00e0 neodymium d\u1ec5 b\u1ecb \u0103n m\u00f2n.<\/li>\n<li>Trong khi l\u1edbp ph\u1ee7 kh\u00f4ng l\u00e0m t\u0103ng c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb, n\u00f3 c\u00f3 th\u1ec3 gi\u00fap duy tr\u00ec hi\u1ec7u su\u1ea5t theo th\u1eddi gian b\u1eb1ng c\u00e1ch ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng.<\/li>\n<\/ul>\n<p><strong>3. \u0110\u00e1nh gi\u00e1 nhi\u1ec7t \u0111\u1ed9<\/strong><\/p>\n<ul>\n<li>M\u1ed7i nam ch\u00e2m c\u00f3 nhi\u1ec7t \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1i \u0111a. Khi qu\u00e1 n\u00f3ng, n\u00f3 c\u00f3 th\u1ec3 m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh\u2014\u0111\u00f4i khi l\u00e0 v\u0129nh vi\u1ec5n.<\/li>\n<li>C\u00e1c lo\u1ea1i c\u1ea5p cao h\u01a1n kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n. V\u00ed d\u1ee5, c\u00e1c c\u1ea5p neodymium ti\u00eau chu\u1ea9n N b\u1eaft \u0111\u1ea7u m\u1ea5t s\u1ee9c m\u1ea1nh kho\u1ea3ng 80\u00b0C (176\u00b0F), nh\u01b0ng c\u00e1c lo\u1ea1i cao nhi\u1ec7t nh\u01b0 N35SH c\u00f3 th\u1ec3 ch\u1ecbu t\u1edbi 150\u00b0C (302\u00b0F).<\/li>\n<\/ul>\n<p><strong>4. \u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng v\u00e0 r\u1ee7i ro m\u1ea5t t\u1eeb t\u00ednh<\/strong><\/p>\n<ul>\n<li>C\u00e1c tr\u01b0\u1eddng t\u1eeb \u0111\u1ed1i l\u1eadp m\u1ea1nh, nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c \u00e1p l\u1ef1c c\u01a1 h\u1ecdc l\u1edbn c\u00f3 th\u1ec3 khi\u1ebfn nam ch\u00e2m m\u1ea5t m\u1ed9t ph\u1ea7n ho\u1eb7c to\u00e0n b\u1ed9 t\u1eeb t\u00ednh c\u1ee7a n\u00f3.<\/li>\n<li>\u0110\u1ed1i v\u1edbi s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m, l\u1edbp ph\u1ee7 ch\u1ed1ng th\u1eddi ti\u1ebft ho\u1eb7c v\u1eadt li\u1ec7u ch\u1ed1ng \u0103n m\u00f2n nh\u01b0 samari cobalt l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t h\u01a1n.<\/li>\n<\/ul>\n<p>L\u01b0u \u00fd c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y khi ch\u1ecdn nam ch\u00e2m c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n tr\u00e1nh mua nh\u1ea7m lo\u1ea1i ph\u00f9 h\u1ee3p cho d\u1ef1 \u00e1n c\u1ee7a m\u00ecnh\u2014d\u00f9 l\u00e0 cho m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p, x\u00e2y d\u1ef1ng s\u1edf th\u00edch hay c\u00e1c thi\u1ebft b\u1ecb t\u00f9y ch\u1ec9nh.<\/p>\n<h2>T\u1ea1i sao ch\u1ecdn v\u1eadt li\u1ec7u t\u1eeb t\u00ednh ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a NBAEM v\u00e0 h\u01b0\u1edbng d\u1eabn chuy\u00ean gia<\/h2>\n<p>Khi b\u1ea1n l\u00e0m vi\u1ec7c v\u1edbi nam ch\u00e2m, c\u1ea5p \u0111\u1ed9 ph\u00f9 h\u1ee3p, l\u1ef1c h\u00fat v\u00e0 m\u1ee9c gauss ch\u00ednh x\u00e1c \u0111\u1ec1u t\u1ea1o n\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t. <strong>NBAEM<\/strong> cung c\u1ea5p \u0111\u1ea7y \u0111\u1ee7 c\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u t\u1eeb <strong>neodymium (N35\u2013N52)<\/strong> \u0111\u1ebfn ferrite, alnico v\u00e0 samari cobalt, v\u1edbi nhi\u1ec1u h\u00ecnh d\u1ea1ng, k\u00edch th\u01b0\u1edbc v\u00e0 l\u1edbp ph\u1ee7 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau.<\/p>\n<h3>D\u1ea3i s\u1ea3n ph\u1ea9m \u0111a d\u1ea1ng theo x\u1ebfp h\u1ea1ng v\u00e0 lo\u1ea1i<\/h3>\n<p>Ch\u00fang t\u00f4i cung c\u1ea5p nam ch\u00e2m cho c\u00e1c s\u1ea3n ph\u1ea9m ti\u00eau d\u00f9ng nh\u1eb9 \u0111\u1ebfn n\u1eb7ng <strong>s\u1eed d\u1ee5ng trong c\u00f4ng nghi\u1ec7p v\u00e0 k\u1ef9 thu\u1eadt<\/strong>. C\u00e1c t\u00f9y ch\u1ecdn bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m Neodymium<\/strong> \u2013 l\u1ef1c h\u00fat cao, k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn<\/li>\n<li><strong>Nam ch\u00e2m ferrite<\/strong> \u2013 ti\u1ebft ki\u1ec7m chi ph\u00ed, ch\u1ed1ng \u0103n m\u00f2n<\/li>\n<li><strong>Nam ch\u00e2m Alnico<\/strong> \u2013 \u1ed5n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 xu\u1ea5t s\u1eafc<\/li>\n<li><strong>Cobalt samari<\/strong> \u2013 \u0111\u1ed9 b\u1ec1n cao, ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 c\u1ef1c cao<\/li>\n<\/ul>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i nam ch\u00e2m<\/th>\n<th>C\u00e1c lo\u1ea1i \u0111i\u1ec3n h\u00ecnh<\/th>\n<th>L\u1ee3i \u00edch ch\u00ednh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Neodymi<\/td>\n<td>N35\u2013N52<\/td>\n<td>L\u1ef1c k\u00e9o cao nh\u1ea5t, k\u00edch th\u01b0\u1edbc nh\u1ecf<\/td>\n<\/tr>\n<tr>\n<td>S\u1eaft ferrit<\/td>\n<td>Y30\u2013Y35<\/td>\n<td>Chi ph\u00ed th\u1ea5p, ch\u1ed1ng g\u1ec9<\/td>\n<\/tr>\n<tr>\n<td>Alnico<\/td>\n<td>Alnico 5\u20138<\/td>\n<td>\u1ed4n \u0111\u1ecbnh nhi\u1ec7t \u0111\u1ed9 cao<\/td>\n<\/tr>\n<tr>\n<td>Samari C\u00f4ban<\/td>\n<td>18\u201332 MGOe<\/td>\n<td>Ch\u1ecbu nhi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 t\u00f9y ch\u1ec9nh<\/h3>\n<p>NBAEM \u0111\u1eb7t tr\u1ecdng t\u00e2m l\u1edbn v\u00e0o <strong>ki\u1ec3m so\u00e1t dung sai ch\u1eb7t ch\u1ebd<\/strong> v\u00e0 <strong>\u0111\u1ed9 m\u1ea1nh t\u1eeb t\u00ednh nh\u1ea5t qu\u00e1n<\/strong>. M\u1ed7i l\u00f4 h\u00e0ng \u0111\u1ec1u \u0111\u01b0\u1ee3c ki\u1ec3m tra l\u1ef1c k\u00e9o v\u00e0 gauss \u0111\u1ec3 \u0111\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n. Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p <strong>h\u00ecnh d\u1ea1ng, k\u00edch th\u01b0\u1edbc v\u00e0 l\u1edbp ph\u1ee7 t\u00f9y ch\u1ec9nh<\/strong> \u0111\u1ec3 nam ch\u00e2m c\u1ee7a b\u1ea1n s\u1eb5n s\u00e0ng cho \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n, d\u00f9 \u0111\u00f3 l\u00e0 cho m\u1ed9t <strong>\u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn, b\u1ed9 ph\u00e2n lo\u1ea1i t\u1eeb, ho\u1eb7c d\u1ef1 \u00e1n t\u1ef1 l\u00e0m<\/strong>.<\/p>\n<h3>H\u01b0\u1edbng d\u1eabn chuy\u00ean gia \u0111\u1ec3 ch\u1ecdn nam ch\u00e2m ph\u00f9 h\u1ee3p<\/h3>\n<p>Ch\u1ecdn nam ch\u00e2m \u0111\u00fang kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 ch\u1ecdn s\u1ed1 N cao nh\u1ea5t. Ch\u00fang t\u00f4i h\u1ee3p t\u00e1c v\u1edbi b\u1ea1n \u0111\u1ec3 ph\u00f9 h\u1ee3p:<\/p>\n<ul>\n<li><strong>C\u1ea5p \u0111\u1ed9 nam ch\u00e2m<\/strong> v\u1edbi \u0111\u1ed9 m\u1ea1nh v\u00e0 chi ph\u00ed<\/li>\n<li><strong>L\u1ef1c h\u00fat<\/strong> v\u1edbi nhu c\u1ea7u t\u1ea3i ho\u1eb7c gi\u1eef ch\u1eb7t c\u1ee7a b\u1ea1n<\/li>\n<li><strong>m\u1ee9c \u0111\u1ed9 Gauss<\/strong> v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c m\u00e0 c\u00f4ng vi\u1ec7c c\u1ee7a b\u1ea1n y\u00eau c\u1ea7u<\/li>\n<li><strong>L\u1edbp ph\u1ee7 v\u00e0 h\u00ecnh d\u1ea1ng<\/strong> v\u1edbi m\u00f4i tr\u01b0\u1eddng v\u1eadn h\u00e0nh v\u00e0 \u0111\u1ed9 b\u1ec1n<\/li>\n<\/ul>\n<p>V\u1edbi <strong>NBAEM<\/strong>, b\u1ea1n kh\u00f4ng ph\u1ea3i \u0111o\u00e1n m\u00f2 \u2013 b\u1ea1n nh\u1eadn \u0111\u01b0\u1ee3c v\u1eadt li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra, x\u1ebfp lo\u1ea1i v\u00e0 s\u1eb5n s\u00e0ng ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c nh\u01b0 b\u1ea1n c\u1ea7n.<\/p>\n<h2>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p FAQs<\/h2>\n<h3>S\u1ed1 N bi\u1ec3u th\u1ecb \u0111i\u1ec1u g\u00ec v\u1ec1 \u0111\u1ed9 m\u1ea1nh<\/h3>\n<p>c\u1ea3 <strong>s\u1ed1 N<\/strong> cho bi\u1ebft c\u1ea5p \u0111\u1ed9 c\u1ee7a nam ch\u00e2m neodymium v\u00e0 li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1ed1i \u0111a (<strong>BHmax<\/strong>). S\u1ed1 N cao h\u01a1n c\u00f3 ngh\u0129a l\u00e0 nam ch\u00e2m c\u00f3 th\u1ec3 l\u01b0u tr\u1eef nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng t\u1eeb h\u01a1n. V\u00ed d\u1ee5, <strong>N35<\/strong> l\u00e0 m\u1ea1nh, nh\u01b0ng <strong>N52<\/strong> cung c\u1ea5p nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n c\u00f9ng k\u00edch th\u01b0\u1edbc. H\u00e3y nh\u1edb r\u1eb1ng s\u1ed1 n\u00e0y kh\u00f4ng ph\u1ea3n \u00e1nh k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd \u2014 hai nam ch\u00e2m c\u00f9ng k\u00edch th\u01b0\u1edbc nh\u01b0ng kh\u00e1c c\u1ea5p \u0111\u1ed9 c\u00f3 th\u1ec3 c\u00f3 \u0111\u1ed9 m\u1ea1nh r\u1ea5t kh\u00e1c nhau.<\/p>\n<h3>M\u1ed1i quan h\u1ec7 gi\u1eefa l\u1ef1c h\u00fat, k\u00edch th\u01b0\u1edbc nam ch\u00e2m v\u00e0 x\u1ebfp h\u1ea1ng<\/h3>\n<p><strong>L\u1ef1c h\u00fat<\/strong> ph\u1ee5 thu\u1ed9c v\u00e0o c\u1ea3 c\u1ea5p \u0111\u1ed9 v\u00e0 k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a nam ch\u00e2m. Nam ch\u00e2m l\u1edbn c\u00f3 c\u1ea5p \u0111\u1ed9 N cao nh\u1ea5t t\u1ea1o ra l\u1ef1c h\u00fat l\u1edbn nh\u1ea5t. V\u00ed d\u1ee5:<\/p>\n<ul>\n<li>M\u1ed9t \u0111\u0129a N52 nh\u1ecf c\u00f3 th\u1ec3 c\u00f3 l\u1ef1c h\u00fat l\u1edbn h\u01a1n \u0111\u0129a N35 l\u1edbn h\u01a1n.<\/li>\n<li>T\u0103ng g\u1ea5p \u0111\u00f4i k\u00edch th\u01b0\u1edbc v\u00e0 n\u00e2ng cao c\u1ea5p \u0111\u1ed9 c\u00f3 th\u1ec3 nh\u00e2n l\u00ean l\u1ef1c h\u00fat \u0111\u00e1ng k\u1ec3.<br \/>\nKhi l\u1ef1a ch\u1ecdn, h\u00e3y ph\u00f9 h\u1ee3p l\u1ef1c h\u00fat v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n \u2014 qu\u00e1 nhi\u1ec1u l\u1ef1c c\u00f3 th\u1ec3 l\u00e0m kh\u00f3 kh\u0103n trong vi\u1ec7c x\u1eed l\u00fd ho\u1eb7c th\u00e1o ra.<\/li>\n<\/ul>\n<h3>S\u1eed d\u1ee5ng \u0111o l\u01b0\u1eddng Gauss \u0111\u1ec3 so s\u00e1nh nam ch\u00e2m<\/h3>\n<p><strong>Gauss<\/strong> \u0111o c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng t\u1ea1i b\u1ec1 m\u1eb7t. A <strong>m\u00e1y \u0111o gauss<\/strong> cho \u0111\u1ecdc tr\u1ef1c ti\u1ebfp m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 so s\u00e1nh. Ch\u1ec9 c\u1ea7n l\u01b0u \u00fd:<\/p>\n<ul>\n<li>C\u00e1c lo\u1ea1i cao c\u1ea5p h\u01a1n th\u01b0\u1eddng cho th\u1ea5y gauss b\u1ec1 m\u1eb7t cao h\u01a1n tr\u00ean c\u00f9ng m\u1ed9t k\u00edch th\u01b0\u1edbc nam ch\u00e2m.<\/li>\n<li>H\u00ecnh d\u1ea1ng, l\u1edbp ph\u1ee7 v\u00e0 kho\u1ea3ng c\u00e1ch \u0111o \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111o.<br \/>\nN\u1ebfu b\u1ea1n so s\u00e1nh c\u00e1c nam ch\u00e2m cho m\u1ed9t d\u1ef1 \u00e1n, h\u00e3y \u0111o ch\u00fang theo c\u00f9ng m\u1ed9t c\u00e1ch \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n<h3>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 l\u1edbp ph\u1ee7 \u0111\u1ebfn hi\u1ec7u su\u1ea5t nam ch\u00e2m<\/h3>\n<p>Nhi\u1ec7t \u0111\u1ed9 v\u00e0 m\u00f4i tr\u01b0\u1eddng c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i hi\u1ec7u su\u1ea5t c\u1ee7a nam ch\u00e2m:<\/p>\n<ul>\n<li>Nhi\u1ec1u lo\u1ea1i cao c\u1ea5p nh\u01b0 N52 m\u1ea5t s\u1ee9c m\u1ea1nh nhanh h\u01a1n d\u01b0\u1edbi nhi\u1ec7t \u0111\u1ed9 cao.<\/li>\n<li>\u0110\u1ec3 ch\u1ed1ng ch\u1ecbu nhi\u1ec7t t\u1ed1t h\u01a1n, h\u00e3y t\u00ecm c\u00e1c lo\u1ea1i \u0111\u1eb7c bi\u1ec7t (v\u00ed d\u1ee5: N42SH ho\u1eb7c N35EH).<\/li>\n<li><strong>L\u1edbp ph\u1ee7<\/strong> nh\u01b0 nickel-kim lo\u1ea1i-nickel ho\u1eb7c epoxy ch\u1ed1ng r\u1ec9 s\u00e9t v\u00e0 bong tr\u00f3c, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi ho\u1eb7c \u1ea9m \u01b0\u1edbt.<br \/>\nCh\u1ecdn \u0111\u00fang m\u1ee9c nhi\u1ec7t \u0111\u1ed9 v\u00e0 l\u1edbp ph\u1ee7 gi\u00fap k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a nam ch\u00e2m v\u00e0 duy tr\u00ec hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c lo\u1ea1i nam ch\u00e2m, l\u1ef1c h\u00fat, c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng v\u00e0 s\u1ed1 N \u0111\u1ec3 ch\u1ecdn nam ch\u00e2m ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n<\/p>","protected":false},"author":1,"featured_media":2043,"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-2045","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\/Neodymium_Magnet_N_Grades_Guide_x0GfgyQrA.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2045","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=2045"}],"version-history":[{"count":1,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2045\/revisions"}],"predecessor-version":[{"id":2050,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2045\/revisions\/2050"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/2043"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=2045"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=2045"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=2045"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}