{"id":1748,"date":"2025-07-10T06:59:53","date_gmt":"2025-07-10T06:59:53","guid":{"rendered":"https:\/\/nbaem.com\/?p=1748"},"modified":"2025-07-10T06:59:53","modified_gmt":"2025-07-10T06:59:53","slug":"overview-for-types-of-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/overview-for-types-of-magnets\/","title":{"rendered":"T\u1ed5ng quan v\u1ec1 c\u00e1c lo\u1ea1i nam ch\u00e2m"},"content":{"rendered":"

H\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi s\u1eed d\u1ee5ng nam ch\u00e2m h\u00e0ng ng\u00e0y, nh\u01b0ng \u00edt ai hi\u1ec3u r\u00f5 v\u1ec1 c\u00e1c lo\u1ea1i kh\u00e1c nhau c\u1ee7a ch\u00fang. L\u1ef1a ch\u1ecdn nam ch\u00e2m ph\u00f9 h\u1ee3p b\u1eaft \u0111\u1ea7u t\u1eeb vi\u1ec7c bi\u1ebft c\u00e1c t\u00f9y ch\u1ecdn t\u1ed3n t\u1ea1i.<\/p>\n

C\u00f3 m\u1ed9t s\u1ed1 lo\u1ea1i nam ch\u00e2m: v\u0129nh c\u1eedu, t\u1ea1m th\u1eddi v\u00e0 \u0111i\u1ec7n t\u1eeb. M\u1ed7i lo\u1ea1i c\u00f3 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o c\u1ea5u tr\u00fac v\u00e0 c\u00e1ch ch\u00fang \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t.<\/strong><\/p>\n

Trong b\u00e0i vi\u1ebft n\u00e0y, t\u00f4i s\u1ebd ph\u00e2n t\u00edch c\u00e1c lo\u1ea1i nam ch\u00e2m ph\u1ed5 bi\u1ebfn nh\u1ea5t, \u0111\u1eb7c t\u00ednh c\u1ee7a ch\u00fang v\u00e0 n\u01a1i ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u th\u00f4ng minh h\u01a1n.<\/p>\n

 <\/p>\n

Nam ch\u00e2m c\u00f3 4 lo\u1ea1i n\u00e0o?<\/h2>\n

B\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e3 nghe v\u1ec1 nam ch\u00e2m neodymium ho\u1eb7c ceramic, nh\u01b0ng \u0111\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a b\u1ee9c tranh to\u00e0n c\u1ea3nh. H\u00e3y c\u00f9ng xem x\u00e9t b\u1ed1n lo\u1ea1i ch\u00ednh.<\/p>\n

B\u1ed1n lo\u1ea1i nam ch\u00e2m ch\u00ednh c\u1ee7a v\u0129nh c\u1eedu l\u00e0 neodymium, samarium cobalt, alnico v\u00e0 ferrite. M\u1ed7i lo\u1ea1i c\u00f3 \u0111i\u1ec3m m\u1ea1nh, \u0111i\u1ec3m y\u1ebfu v\u00e0 \u1ee9ng d\u1ee5ng l\u00fd t\u01b0\u1edfng ri\u00eang.<\/strong><\/p>\n

\"B\u1ed1n

B\u1ed1n lo\u1ea1i nam ch\u00e2m (Neodymium-AlNiCo-Ferrite (g\u1ed1m)-SmCo<\/p><\/div>\n

<\/h3>\n

Hi\u1ec3u r\u00f5 4 lo\u1ea1i nam ch\u00e2m v\u0129nh c\u1eedu ch\u00ednh<\/h3>\n

C\u00e1c lo\u1ea1i nam ch\u00e2m n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ecdi th\u1ee9 t\u1eeb \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng \u0111\u1ebfn \u0111\u1ed9ng c\u01a1. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1i nh\u00ecn g\u1ea7n h\u01a1n:<\/p>\n\n\n\n\n\n\n\n\n
Lo\u1ea1i nam ch\u00e2m<\/th>\nM\u1ee9c \u0111\u1ed9 m\u1ea1nh<\/th>\nCh\u1ecbu nhi\u1ec7t<\/th>\nCh\u1ed1ng \u0103n m\u00f2n<\/th>\nGi\u00e1 th\u00e0nh<\/th>\n<\/tr>\n<\/thead>\n
Neodymium (NdFeB)<\/a><\/span><\/strong><\/td>\nR\u1ea5t cao<\/td>\nV\u1eeba ph\u1ea3i<\/td>\nTh\u1ea5p (c\u1ea7n ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7)<\/td>\nTrung b\u00ecnh \u2013 Cao<\/td>\n<\/tr>\n
Samari C\u00f4ban<\/a><\/span><\/strong><\/td>\nCao<\/td>\nCao<\/td>\nCao<\/td>\nCao<\/td>\n<\/tr>\n
Alnico<\/a><\/span><\/strong><\/td>\nTrung b\u00ecnh<\/td>\nR\u1ea5t cao<\/td>\nTh\u1ea5p<\/td>\nTrung b\u00ecnh<\/td>\n<\/tr>\n
Ferrite (G\u1ed1m)<\/a><\/strong><\/span><\/td>\nTh\u1ea5p \u2013 Trung b\u00ecnh<\/td>\nCao<\/td>\nCao<\/td>\nTh\u1ea5p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
    \n
  • NdFeB<\/strong> l\u00e0 m\u1ea1nh nh\u1ea5t v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong xe \u0111i\u1ec7n v\u00e0 tai nghe.<\/li>\n
  • SmCo<\/strong> xu\u1ea5t s\u1eafc trong m\u00f4i tr\u01b0\u1eddng nhi\u1ec7t \u0111\u1ed9 cao, kh\u1eafc nghi\u1ec7t.<\/li>\n
  • Alnico<\/strong> \u0111em l\u1ea1i hi\u1ec7u su\u1ea5t \u1ed5n \u0111\u1ecbnh trong thi\u1ebft b\u1ecb \u00e2m nh\u1ea1c.<\/li>\n
  • S\u1eaft ferrit<\/strong> gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng v\u00e0 ph\u1ed5 bi\u1ebfn trong c\u00e1c s\u1ea3n ph\u1ea9m h\u00e0ng ng\u00e0y.<\/li>\n<\/ul>\n

    <\/h2>\n

    Nam ch\u00e2m ch\u00ednh g\u1ed3m 3 lo\u1ea1i n\u00e0o?<\/h2>\n

    Kh\u00f4ng ph\u1ea3i m\u1ecdi nam ch\u00e2m \u0111\u1ec1u l\u00e0 v\u0129nh c\u1eedu. M\u1ed9t s\u1ed1 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng khi c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua. \u0110i\u1ec1u n\u00e0y thay \u0111\u1ed5i c\u00e1ch ch\u00fang ta s\u1eed d\u1ee5ng ch\u00fang.<\/p>\n

    Ba lo\u1ea1i nam ch\u00e2m ch\u00ednh l\u00e0 nam ch\u00e2m v\u0129nh c\u1eedu, nam ch\u00e2m t\u1ea1m th\u1eddi v\u00e0 \u0111i\u1ec7n t\u1eeb. Ch\u00fang kh\u00e1c nhau v\u1ec1 c\u00e1ch ch\u00fang t\u00edch tr\u1eef v\u00e0 m\u1ea5t t\u1eeb t\u00ednh.<\/strong><\/p>\n

    Kh\u00e1m ph\u00e1 nam ch\u00e2m v\u0129nh c\u1eedu, t\u1ea1m th\u1eddi v\u00e0 \u0111i\u1ec7n t\u1eeb<\/h3>\n
      \n
    • Nam ch\u00e2m v\u0129nh c\u1eedu<\/strong> gi\u1eef t\u1eeb t\u00ednh theo th\u1eddi gian. C\u00e1c v\u00ed d\u1ee5 ph\u1ed5 bi\u1ebfn bao g\u1ed3m nam ch\u00e2m NdFeB v\u00e0 ferrite.<\/li>\n
    • Nam ch\u00e2m t\u1ea1m th\u1eddi<\/strong> ch\u1ec9 tr\u1edf th\u00e0nh nam ch\u00e2m khi g\u1ea7n m\u1ed9t tr\u01b0\u1eddng t\u1eeb. S\u1eaft m\u1ec1m th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho vai tr\u00f2 n\u00e0y.<\/li>\n
    • Nam ch\u00e2m \u0111i\u1ec7n<\/strong> y\u00eau c\u1ea7u d\u00f2ng \u0111i\u1ec7n. Khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua m\u1ed9t cu\u1ed9n d\u00e2y qu\u1ea5n quanh m\u1ed9t l\u00f5i, l\u00f5i tr\u1edf th\u00e0nh nam ch\u00e2m. T\u1eaft ngu\u1ed3n, v\u00e0 t\u1eeb t\u00ednh bi\u1ebfn m\u1ea5t.<\/li>\n<\/ul>\n

      V\u00ed d\u1ee5 Th\u1ef1c t\u1ebf<\/h4>\n\n\n\n\n\n\n\n
      Lo\u1ea1i nam ch\u00e2m<\/th>\n\u1ee8ng d\u1ee5ng V\u00ed d\u1ee5<\/th>\n<\/tr>\n<\/thead>\n
      Nam ch\u00e2m v\u0129nh c\u1eedu<\/td>\nTai nghe, \u0111\u1ed9ng c\u01a1, gio\u0103ng t\u1ee7 l\u1ea1nh<\/td>\n<\/tr>\n
      Nam ch\u00e2m t\u1ea1m th\u1eddi<\/td>\nK\u1eb9p \u0111i\u1ec7n t\u1eeb, d\u1ee5ng c\u1ee5 n\u00e2ng<\/td>\n<\/tr>\n
      T\u1eeb tr\u01b0\u1eddng<\/td>\nM\u00e1y MRI, chu\u00f4ng \u0111i\u1ec7n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      M\u1ed7i lo\u1ea1i nam ch\u00e2m c\u00f3 h\u00e0nh vi ri\u00eang. T\u00f4i th\u01b0\u1eddng s\u1eed d\u1ee5ng nam ch\u00e2m v\u0129nh c\u1eedu cho c\u00e1c b\u1ed9 \u0111\u1ed9ng c\u01a1 c\u1ee7a kh\u00e1ch h\u00e0ng. Nh\u01b0ng khi kh\u00e1ch h\u00e0ng c\u1ea7n m\u1ed9t tr\u01b0\u1eddng c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i ho\u1eb7c ki\u1ec3m so\u00e1t an to\u00e0n, nam ch\u00e2m \u0111i\u1ec7n ph\u00f9 h\u1ee3p h\u01a1n.<\/p>\n

      <\/h2>\n

      7 lo\u1ea1i t\u1eeb t\u00ednh l\u00e0 g\u00ec?<\/h2>\n

      H\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi ngh\u0129 t\u1eeb t\u00ednh \u0111\u01a1n gi\u1ea3n\u2014v\u1eadt th\u1ec3 h\u00fat ho\u1eb7c \u0111\u1ea9y nhau. Trong th\u1ef1c t\u1ebf, t\u1eeb t\u00ednh xu\u1ea5t hi\u1ec7n theo b\u1ea3y c\u00e1ch ri\u00eang bi\u1ec7t.<\/p>\n

      B\u1ea3y lo\u1ea1i t\u1eeb t\u00ednh l\u00e0: t\u1eeb ph\u1ea3n magnetism, t\u1eeb paramagnetism, t\u1eeb ferromagnetism, t\u1eeb antiferromagnetism, t\u1eeb ferrimagnetism, t\u1eeb si\u00eau ph\u1ea3n magnetism, v\u00e0 t\u1eeb si\u00eau t\u1eeb.<\/strong><\/p>\n

      Ph\u00e2n t\u00edch v\u1ec1 B\u1ea3y lo\u1ea1i t\u1eeb t\u00ednh<\/h3>\n

      Nh\u1eefng ph\u00e2n lo\u1ea1i n\u00e0y gi\u00fap gi\u1ea3i th\u00edch t\u1ea1i sao c\u00e1c v\u1eadt li\u1ec7u h\u00e0nh x\u1eed kh\u00e1c nhau khi ti\u1ebfp x\u00fac v\u1edbi tr\u01b0\u1eddng t\u1eeb.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
      Lo\u1ea1i T\u1eeb T\u00ednh<\/th>\nPh\u1ea3n \u1ee9ng t\u1eeb<\/th>\nV\u1eadt li\u1ec7u Ph\u1ed5 bi\u1ebfn<\/th>\n<\/tr>\n<\/thead>\n
      Diamagnet<\/td>\nS\u1ef1 \u0111\u1ea9y y\u1ebfu t\u1eeb tr\u01b0\u1eddng t\u1eeb<\/td>\nBismuth, \u0110\u1ed3ng<\/td>\n<\/tr>\n
      H\u1ea5p d\u1eabn paramagnet<\/td>\nS\u1ef1 h\u00fat y\u1ebfu trong tr\u01b0\u1eddng t\u1eeb<\/td>\nNh\u00f4m, B\u1ea1ch kim<\/td>\n<\/tr>\n
      H\u1ea5p d\u1eabn ferromagnet<\/td>\nH\u00e0nh vi t\u1eeb t\u00ednh m\u1ea1nh, l\u00e2u d\u00e0i<\/td>\nS\u1eaft, Nickel, Cobalt<\/td>\n<\/tr>\n
      Ch\u1ed1ng t\u1eeb<\/td>\nC\u00e1c moment t\u1eeb \u0111\u1ed1i l\u1eadp tri\u1ec7t ti\u00eau l\u1eabn nhau<\/td>\nOxide Mangan<\/td>\n<\/tr>\n
      T\u1eeb t\u00ednh ferri<\/td>\nC\u00e1c moment \u0111\u1ed1i l\u1eadp v\u1edbi t\u1eeb tr\u01b0\u1eddng t\u1ed5ng h\u1ee3p<\/td>\nMagnetit<\/td>\n<\/tr>\n
      Si\u00eau ph\u1ea3n t\u1eeb<\/td>\nT\u1eeb t\u00ednh m\u1ea1nh nh\u01b0ng t\u1ea1m th\u1eddi trong c\u00e1c h\u1ea1t nh\u1ecf<\/td>\nH\u1ea1t nano<\/td>\n<\/tr>\n
      T\u1eeb t\u00ednh metamagnetism<\/td>\nS\u1ef1 nh\u1ea3y \u0111\u1ed9t ng\u1ed9t c\u1ee7a t\u1eeb t\u00ednh khi c\u00f3 t\u1eeb tr\u01b0\u1eddng<\/td>\nM\u1ed9t s\u1ed1 h\u1ee3p kim \u0111\u1ea5t hi\u1ebfm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Trong c\u00f4ng vi\u1ec7c v\u1edbi nam ch\u00e2m c\u00f4ng nghi\u1ec7p, t\u00f4i ch\u1ee7 y\u1ebfu l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c v\u1eadt li\u1ec7u ferromagnetic v\u00e0 ferrimagnetic. Ch\u00fang cung c\u1ea5p \u0111\u1ed9 m\u1ea1nh c\u1ea7n thi\u1ebft trong \u0111\u1ed9ng c\u01a1 v\u00e0 c\u1ea3m bi\u1ebfn. C\u00e1c d\u1ea1ng kh\u00e1c, d\u00f9 \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n, nh\u01b0ng r\u1ea5t quan tr\u1ecdng trong nghi\u00ean c\u1ee9u v\u00e0 \u0111i\u1ec7n t\u1eed ti\u00ean ti\u1ebfn.<\/p>\n

      K\u1ebft lu\u1eadn<\/h2>\n

      Hi\u1ec3u c\u00e1c lo\u1ea1i nam ch\u00e2m v\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ch\u1ecdn \u0111\u00fang lo\u1ea1i cho s\u1ea3n ph\u1ea9m ti\u1ebfp theo c\u1ee7a m\u00ecnh.<\/p>","protected":false},"excerpt":{"rendered":"

      H\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi s\u1eed d\u1ee5ng nam ch\u00e2m h\u00e0ng ng\u00e0y, nh\u01b0ng \u00edt ai hi\u1ec3u r\u00f5 c\u00e1c lo\u1ea1i kh\u00e1c nhau c\u1ee7a ch\u00fang. Vi\u1ec7c ch\u1ecdn \u0111\u00fang lo\u1ea1i nam ch\u00e2m b\u1eaft \u0111\u1ea7u t\u1eeb vi\u1ec7c bi\u1ebft c\u00e1c t\u00f9y ch\u1ecdn c\u00f3 s\u1eb5n. C\u00f3 nhi\u1ec1u lo\u1ea1i nam ch\u00e2m: v\u0129nh c\u1eedu, t\u1ea1m th\u1eddi v\u00e0 \u0111i\u1ec7n t\u1eeb. M\u1ed7i lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o c\u1ea5u tr\u00fac v\u00e0 c\u00e1ch ch\u00fang \u0111\u01b0\u1ee3c c\u1ea5p n\u0103ng l\u01b0\u1ee3ng. Trong b\u00e0i vi\u1ebft n\u00e0y, t\u00f4i s\u1ebd ph\u00e2n t\u00edch [\u2026]<\/p>","protected":false},"author":1,"featured_media":1750,"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-1748","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2025\/07\/Four-types-of-magnetsNeodymium-AlNiCo-Ferriteceramic-SmCO.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1748","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=1748"}],"version-history":[{"count":4,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1748\/revisions"}],"predecessor-version":[{"id":1753,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1748\/revisions\/1753"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1750"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}