{"id":136568,"date":"2025-11-14T10:26:26","date_gmt":"2025-11-14T02:26:26","guid":{"rendered":"https:\/\/www.alpapowder.com\/136568\/"},"modified":"2025-11-14T10:26:26","modified_gmt":"2025-11-14T02:26:26","slug":"hieu-ve-vat-lieu-sieu-ben-ndfeb","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/136568\/","title":{"rendered":"Hi\u1ec3u v\u1ec1 v\u1eadt li\u1ec7u si\u00eau b\u1ec1n\u2014NdFeB"},"content":{"rendered":"

\"\"<\/p>\n

NdFeB thi\u00eau k\u1ebft, l\u00e0 quy tr\u00ecnh ch\u1ebf t\u1ea1o s\u1edbm nh\u1ea5t v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t, \u0111\u00e3 th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng c\u1ee7a v\u1eadt li\u1ec7u nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u1ea5t hi\u1ebfm. NdFeB thi\u00eau k\u1ebft, v\u1edbi t\u00ednh d\u1ecb h\u01b0\u1edbng t\u1eeb m\u1ea1nh v\u00e0 nguy\u00ean li\u1ec7u th\u00f4 gi\u00e1 r\u1ebb, \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ee5c ti\u00eau nghi\u00ean c\u1ee9u c\u1ee7a nhi\u1ec1u qu\u1ed1c gia. V\u1eadt li\u1ec7u nam ch\u00e2m v\u0129nh c\u1eedu NdFeB thi\u00eau k\u1ebft s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 luy\u1ec7n kim b\u1ed9t. H\u1ee3p kim n\u1ea5u ch\u1ea3y \u0111\u01b0\u1ee3c nghi\u1ec1n th\u00e0nh b\u1ed9t v\u00e0 \u00e9p th\u00e0nh kh\u1ed1i n\u00e9n trong t\u1eeb tr\u01b0\u1eddng. Kh\u1ed1i n\u00e9n sau \u0111\u00f3 \u0111\u01b0\u1ee3c thi\u00eau k\u1ebft trong kh\u00ed tr\u01a1 ho\u1eb7c ch\u00e2n kh\u00f4ng \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 \u0111\u1eb7c. H\u01a1n n\u1eefa, \u0111\u1ec3 c\u1ea3i thi\u1ec7n l\u1ef1c kh\u00e1ng t\u1eeb c\u1ee7a nam ch\u00e2m, th\u01b0\u1eddng c\u1ea7n x\u1eed l\u00fd nhi\u1ec7t l\u00e3o h\u00f3a. Quy tr\u00ecnh nh\u01b0 sau: chu\u1ea9n b\u1ecb nguy\u00ean li\u1ec7u th\u00f4 \u2192 n\u1ea5u ch\u1ea3y \u2192 chu\u1ea9n b\u1ecb b\u1ed9t \u2192 \u00e9p \u2192 thi\u00eau k\u1ebft v\u00e0 ram \u2192 th\u1eed nghi\u1ec7m t\u1eeb t\u00ednh \u2192 m\u00e0i \u2192 gia c\u00f4ng \u2192 m\u1ea1 \u0111i\u1ec7n \u2192 th\u00e0nh ph\u1ea9m.<\/p>\n

Kh\u00f4ng gi\u1ed1ng nh\u01b0 NdFeB thi\u00eau k\u1ebft, c\u00e1c h\u1ea1t b\u1ed9t ri\u00eang l\u1ebb c\u1ee7a nam ch\u00e2m li\u00ean k\u1ebft c\u1ea7n c\u00f3 l\u1ef1c kh\u00e1ng t\u1eeb \u0111\u1ee7 cao. M\u1ed9t khi c\u1ea5u tr\u00fac \u0111a pha v\u00e0 vi c\u1ea5u tr\u00fac c\u1ea7n thi\u1ebft cho l\u1ef1c kh\u00e1ng t\u1eeb cao b\u1ecb ph\u00e1 h\u1ee7y nghi\u00eam tr\u1ecdng trong qu\u00e1 tr\u00ecnh chu\u1ea9n b\u1ecb b\u1ed9t, s\u1ebd kh\u00f4ng th\u1ec3 s\u1ea3n xu\u1ea5t nam ch\u00e2m li\u00ean k\u1ebft t\u1ed1t. Do \u0111\u00f3, b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p b\u1ed9t t\u1eeb t\u00f4i nhanh n\u00f3ng ch\u1ea3y quay, h\u1ee3p kim n\u00f3ng ch\u1ea3y tr\u01b0\u1edbc ti\u00ean \u0111\u01b0\u1ee3c \u0111\u1ed5 ho\u1eb7c phun l\u00ean m\u1ed9t b\u00e1nh xe \u0111\u1ed3ng l\u00e0m m\u00e1t b\u1eb1ng n\u01b0\u1edbc quay t\u1ed1c \u0111\u1ed9 cao \u0111\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t d\u1ea3i m\u1ecfng c\u00f3 \u0111\u1ed9 d\u00e0y 100 \u03bcm.<\/p>\n

Vi\u1ec7c s\u1ea3n xu\u1ea5t nam ch\u00e2m \u00e9p n\u00f3ng\/bi\u1ebfn d\u1ea1ng n\u00f3ng \u0111\u00f2i h\u1ecfi ph\u1ea3i b\u1eaft \u0111\u1ea7u b\u1eb1ng b\u1ed9t t\u1eeb Nd-Fe-B \u0111\u01b0\u1ee3c t\u00f4i nhanh, thay v\u00ec s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp h\u1ee3p kim \u0111\u00fac. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng \u0111i\u1ec1u ki\u1ec7n t\u00f4i qu\u00e1 m\u1ee9c (l\u00e0m ngu\u1ed9i nhanh), c\u00e1c h\u1ea1t m\u1ecbn h\u01a1n, ho\u1eb7c th\u1eadm ch\u00ed b\u1ed9t t\u1eeb v\u00f4 \u0111\u1ecbnh h\u00ecnh, \u0111\u01b0\u1ee3c t\u1ea1o ra. Trong qu\u00e1 tr\u00ecnh \u00e9p n\u00f3ng v\u00e0 bi\u1ebfn d\u1ea1ng n\u00f3ng, c\u00e1c h\u1ea1t \u0111\u01b0\u1ee3c nung n\u00f3ng v\u00e0 ph\u00e1t tri\u1ec3n \u0111\u1ebfn k\u00edch th\u01b0\u1edbc g\u1ea7n b\u1eb1ng mi\u1ec1n \u0111\u01a1n, do \u0111\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c l\u1ef1c kh\u00e1ng t\u1eeb cao trong nam ch\u00e2m cu\u1ed1i c\u00f9ng. Qu\u00e1 tr\u00ecnh \u00e9p n\u00f3ng bao g\u1ed3m vi\u1ec7c \u0111\u1eb7t b\u1ed9t t\u1eeb v\u00e0o khu\u00f4n v\u00e0 t\u1ea1o \u00e1p su\u1ea5t \u1edf nhi\u1ec7t \u0111\u1ed9 cao \u0111\u1ec3 \u00e9p n\u00f3 v\u00e0o nam ch\u00e2m r\u1eafn \u0111\u1eb3ng h\u01b0\u1edbng.<\/p>\n

\u1ee8ng d\u1ee5ng<\/p>\n

\u0110\u1ed9ng c\u01a1 nam ch\u00e2m v\u0129nh c\u1eedu<\/p>\n

Trong \u0111\u1ed9ng c\u01a1 nam ch\u00e2m v\u0129nh c\u1eedu, vi\u1ec7c s\u1eed d\u1ee5ng nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u1ec3 k\u00edch th\u00edch kh\u00f4ng ch\u1ec9 gi\u1ea3m ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng v\u00e0 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng m\u00e0 c\u00f2n c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t \u0111\u1ed9ng c\u01a1.<\/p>\n

M\u00e1y m\u00f3c t\u1eeb t\u00ednh<\/p>\n

M\u00e1y m\u00f3c t\u1eeb t\u00ednh ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng l\u1ef1c \u0111\u1ea9y c\u1ee7a c\u00e1c c\u1ef1c c\u00f9ng d\u1ea5u ho\u1eb7c l\u1ef1c h\u00fat c\u1ee7a c\u00e1c c\u1ef1c kh\u00e1c d\u1ea5u trong nam ch\u00e2m. \u0110i\u1ec1u n\u00e0y \u0111\u00f2i h\u1ecfi nam ch\u00e2m v\u0129nh c\u1eedu c\u00f3 \u0111\u1ed9 t\u1eeb d\u01b0 cao v\u00e0 l\u1ef1c kh\u00e1ng t\u1eeb n\u1ed9i t\u1ea1i cao. H\u01a1n n\u1eefa, do nguy\u00ean l\u00fd h\u00fat gi\u1eefa c\u00e1c c\u1ef1c kh\u00e1c d\u1ea5u, c\u00e1c b\u1ed9 truy\u1ec1n \u0111\u1ed9ng t\u1eeb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng c\u00e1ch truy\u1ec1n \u0111\u1ed9ng kh\u00f4ng ti\u1ebfp x\u00fac, mang l\u1ea1i nh\u1eefng \u01b0u \u0111i\u1ec3m nh\u01b0 kh\u00f4ng ma s\u00e1t v\u00e0 ti\u1ebfng \u1ed3n. Do \u0111\u00f3, nam ch\u00e2m Nd-Fe-B hi\u1ec7u su\u1ea5t cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c b\u1ed9 ph\u1eadn truy\u1ec1n \u0111\u1ed9ng c\u1ee7a m\u00e1y m\u00f3c khai th\u00e1c m\u1ecf, \u1ed5 tr\u1ee5c t\u1eeb t\u00ednh trong con quay h\u1ed3i chuy\u1ec3n v\u00e0 tua bin trong v\u1ec7 tinh v\u00e0 t\u00e0u v\u0169 tr\u1ee5, v\u00e0 \u1ed5 tr\u1ee5c rotor trong m\u00e1y b\u01a1m ly t\u00e2m \u0111\u1ec3 h\u1ed7 tr\u1ee3 ch\u1ee9c n\u0103ng tim trong thi\u1ebft b\u1ecb y t\u1ebf.<\/p>\n

H\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5<\/p>\n

V\u1eadt li\u1ec7u nam ch\u00e2m v\u0129nh c\u1eedu \u0111\u1ea5t hi\u1ebfm l\u00e0 v\u1eadt li\u1ec7u kh\u00f4ng th\u1ec3 thi\u1ebfu trong c\u00e1c v\u1ee5 ph\u00f3ng t\u00ean l\u1eeda, \u0111\u1ecbnh v\u1ecb v\u1ec7 tinh v\u00e0 c\u00f4ng ngh\u1ec7 truy\u1ec1n th\u00f4ng. V\u1eadt li\u1ec7u Nd-Fe-B thi\u00eau k\u1ebft hi\u1ec7u su\u1ea5t cao \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch trong c\u00e1c h\u1ec7 th\u1ed1ng thu\/ph\u00e1t s\u00f3ng vi ba cho radar. T\u1eadn d\u1ee5ng hi\u1ec7u \u1ee9ng k\u1ebft h\u1ee3p c\u1ee7a t\u1eeb tr\u01b0\u1eddng kh\u00f4ng \u0111\u1ed5i v\u00e0 t\u1eeb tr\u01b0\u1eddng vi ba xen k\u1ebd, c\u1ed9ng h\u01b0\u1edfng s\u1eaft t\u1eeb x\u1ea3y ra, cho ph\u00e9p ch\u1ebf t\u1ea1o c\u00e1c b\u1ed9 tu\u1ea7n ho\u00e0n vi ba, b\u1ed9 c\u00e1ch ly, v.v. \u0110i\u1ec7n t\u1eed Ti\u00eau d\u00f9ng<\/p>\n

\u0110i\u1ec7n t\u1eed ti\u00eau d\u00f9ng 3C lu\u00f4n l\u00e0 m\u1ed9t ng\u00e0nh c\u00f4ng nghi\u1ec7p h\u1ea1 ngu\u1ed3n quan tr\u1ecdng \u0111\u1ed1i v\u1edbi v\u1eadt li\u1ec7u NdFeB thi\u00eau k\u1ebft. NdFeB thi\u00eau k\u1ebft s\u1edf h\u1eefu c\u00e1c \u0111\u1eb7c t\u00ednh nh\u01b0 s\u1ea3n ph\u1ea9m n\u0103ng l\u01b0\u1ee3ng t\u1eeb cao, ph\u00f9 h\u1ee3p v\u1edbi xu h\u01b0\u1edbng thu nh\u1ecf, gi\u1ea3m tr\u1ecdng l\u01b0\u1ee3ng v\u00e0 l\u00e0m m\u1ecfng trong c\u00e1c s\u1ea3n ph\u1ea9m \u0111i\u1ec7n t\u1eed ti\u00eau d\u00f9ng 3C. V\u1eadt li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c linh ki\u1ec7n \u0111i\u1ec7n t\u1eed nh\u01b0 VCM, \u0111\u1ed9ng c\u01a1 tuy\u1ebfn t\u00ednh \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, m\u00e1y \u1ea3nh, tai nghe, loa v\u00e0 \u0111\u1ed9ng c\u01a1 truy\u1ec1n \u0111\u1ed9ng tr\u1ee5c ch\u00ednh.<\/p>\n","protected":false},"excerpt":{"rendered":"

Qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t nam ch\u00e2m \u00e9p n\u00f3ng\/bi\u1ebfn d\u1ea1ng n\u00f3ng \u0111\u00f2i h\u1ecfi ph\u1ea3i b\u1eaft \u0111\u1ea7u b\u1eb1ng b\u1ed9t t\u1eeb Nd-Fe-B l\u00e0m ngu\u1ed9i nhanh, thay v\u00ec s\u1eed d\u1ee5ng tr\u1ef1c ti\u1ebfp h\u1ee3p kim \u0111\u00fac.<\/p>\n","protected":false},"author":7,"featured_media":136543,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-136568","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghiep-tin-tuc-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/136568","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=136568"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/136568\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/136543"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=136568"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=136568"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=136568"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}