{"id":1870,"date":"2025-08-12T06:52:46","date_gmt":"2025-08-12T06:52:46","guid":{"rendered":"https:\/\/nbaem.com\/?p=1870"},"modified":"2025-08-13T04:54:49","modified_gmt":"2025-08-13T04:54:49","slug":"cool-facts-about-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/cool-facts-about-magnets\/","title":{"rendered":"Nh\u1eefng s\u1ef1 th\u1eadt th\u00fa v\u1ecb v\u1ec1 nam ch\u00e2m v\u00e0 nh\u1eefng \u1ee9ng d\u1ee5ng tuy\u1ec7t v\u1eddi c\u1ee7a ch\u00fang"},"content":{"rendered":"<p>Nam ch\u00e2m xu\u1ea5t hi\u1ec7n kh\u1eafp n\u01a1i\u2014t\u1eeb c\u00e1c linh ki\u1ec7n nh\u1ecf trong \u0111i\u1ec7n tho\u1ea1i c\u1ee7a b\u1ea1n \u0111\u1ebfn c\u00e1c m\u00e1y m\u00f3c kh\u1ed5ng l\u1ed3 ph\u1ee5c v\u1ee5 ng\u00e0nh c\u00f4ng nghi\u1ec7p. Nh\u01b0ng b\u1ea1n c\u00f3 bi\u1ebft r\u1eb1ng c\u00f3 m\u1ed9t th\u1ebf gi\u1edbi \u0111\u1ea7y <strong>nh\u1eefng s\u1ef1 th\u1eadt th\u00fa v\u1ecb v\u1ec1 nam ch\u00e2m<\/strong> m\u00e0 h\u1ea7u h\u1ebft m\u1ecdi ng\u01b0\u1eddi kh\u00f4ng nh\u1eadn ra? D\u00f9 b\u1ea1n l\u00e0 h\u1ecdc sinh, ng\u01b0\u1eddi \u0111am m\u00ea c\u00f4ng ngh\u1ec7, hay ch\u1ec9 \u0111\u01a1n gi\u1ea3n t\u00f2 m\u00f2 v\u1ec1 c\u00e1ch t\u1eeb tr\u01b0\u1eddng h\u00ecnh th\u00e0nh th\u1ebf gi\u1edbi c\u1ee7a ch\u00fang ta, b\u00e0i vi\u1ebft n\u00e0y s\u1ebd m\u1edf r\u1ed9ng t\u1ea7m m\u1eaft c\u1ee7a b\u1ea1n v\u1ec1 nh\u1eefng s\u1ef1 th\u1eadt b\u1ea5t ng\u1edd v\u1ec1 nh\u1eefng l\u1ef1c v\u00f4 h\u00ecnh n\u00e0y.<\/p>\n<p>T\u1ea1i NBAEM, m\u1ed9t nh\u00e0 cung c\u1ea5p <strong>v\u1eadt li\u1ec7u t\u1eeb h\u00e0ng \u0111\u1ea7u t\u1ea1i Vi\u1ec7t Nam<\/strong>, ch\u00fang t\u00f4i \u0111\u00e3 ch\u1ee9ng ki\u1ebfn tr\u1ef1c ti\u1ebfp c\u00e1ch nam ch\u00e2m v\u01b0\u1ee3t ra ngo\u00e0i l\u1edbp h\u1ecdc khoa h\u1ecdc v\u00e0 tr\u1edf th\u00e0nh ph\u1ea7n kh\u00f4ng th\u1ec3 thi\u1ebfu trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y v\u00e0 c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn. S\u1eb5n s\u00e0ng kh\u00e1m ph\u00e1 c\u00e1ch nam ch\u00e2m ho\u1ea1t \u0111\u1ed9ng, t\u1ea1i sao ch\u00fang l\u1ea1i m\u1ea1nh m\u1ebd \u0111\u1ebfn v\u1eady, v\u00e0 c\u00e1ch ch\u00fang \u0111\u01b0\u1ee3c t\u1ea1o ra ch\u01b0a? H\u00e3y b\u1eaft \u0111\u1ea7u n\u00e0o!<\/p>\n<h2>Nh\u1eefng \u0111i\u1ec1u c\u1ea7n bi\u1ebft nhanh v\u1ec1 Khoa h\u1ecdc v\u1ec1 Nam ch\u00e2m<\/h2>\n<p>Nam ch\u00e2m l\u00e0 c\u00e1c v\u1eadt th\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng h\u00fat c\u00e1c kim lo\u1ea1i nh\u1ea5t \u0111\u1ecbnh, nh\u01b0 s\u1eaft, nickel v\u00e0 cobalt, nh\u1edd v\u00e0o m\u1ed9t l\u1ef1c g\u1ecdi l\u00e0 <strong>t\u1eeb t\u00ednh<\/strong>. L\u1ef1c n\u00e0y \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a c\u00e1c h\u1ea1t mang \u0111i\u1ec7n\u2014ch\u1ee7 y\u1ebfu l\u00e0 c\u00e1c electron trong nguy\u00ean t\u1eed. Trong c\u00e1c v\u1eadt li\u1ec7u t\u1eeb, nhi\u1ec1u electron n\u00e0y quay c\u00f9ng chi\u1ec1u, t\u1ea1o ra m\u1ed9t hi\u1ec7u \u1ee9ng t\u1eeb h\u1ee3p l\u1ea1i \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c g\u1ea7n \u0111\u00f3.<\/p>\n<h3>C\u00e1c lo\u1ea1i nam ch\u00e2m<\/h3>\n<p>C\u00f3 hai lo\u1ea1i ch\u00ednh m\u00e0 b\u1ea1n s\u1ebd nghe th\u1ea5y:<\/p>\n<ul>\n<li><strong>Nam ch\u00e2m v\u0129nh c\u1eedu<\/strong> \u2013 Lo\u1ea1i n\u00e0y gi\u1eef \u0111\u01b0\u1ee3c t\u1eeb t\u00ednh theo th\u1eddi gian v\u00e0 kh\u00f4ng c\u1ea7n ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng b\u00ean ngo\u00e0i. M\u1ed9t chi\u1ebfc nam ch\u00e2m t\u1ee7 l\u1ea1nh l\u00e0 m\u1ed9t v\u00ed d\u1ee5 \u0111\u01a1n gi\u1ea3n.<\/li>\n<li><strong>Nam ch\u00e2m \u0111i\u1ec7n<\/strong> \u2013 Lo\u1ea1i n\u00e0y t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb ch\u1ec9 khi c\u00f3 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua ch\u00fang. Ch\u00fang th\u01b0\u1eddng th\u1ea5y trong c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 chu\u00f4ng c\u1eeda, loa, v\u00e0 c\u1ea7n c\u1ea9u c\u00f4ng nghi\u1ec7p.<\/li>\n<\/ul>\n<h3>C\u00e1ch nam ch\u00e2m t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb<\/h3>\n<p>N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t, c\u00e1c tr\u01b0\u1eddng t\u1eeb l\u00e0 c\u00e1c khu v\u1ef1c v\u00f4 h\u00ecnh xung quanh m\u1ed9t nam ch\u00e2m n\u01a1i c\u00e1c l\u1ef1c t\u1eeb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n. Ch\u00fang \u0111\u01b0\u1ee3c t\u1ea1o ra khi c\u00e1c electron trong nguy\u00ean t\u1eed c\u1ee7a m\u1ed9t v\u1eadt li\u1ec7u di chuy\u1ec3n ho\u1eb7c quay theo m\u1ed9t c\u00e1ch ph\u1ed1i h\u1ee3p. Trong c\u00e1c nam ch\u00e2m v\u0129nh c\u1eedu, s\u1ef1 s\u1eafp x\u1ebfp n\u00e0y gi\u1eef nguy\u00ean, c\u00f2n trong c\u00e1c nam ch\u00e2m \u0111i\u1ec7n, n\u00f3 ch\u1ec9 xu\u1ea5t hi\u1ec7n khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua.<\/p>\n<p>N\u1ebfu b\u1ea1n t\u1eebng r\u1eafc b\u1ee5i s\u1eaft quanh m\u1ed9t nam ch\u00e2m v\u00e0 th\u1ea5y ch\u00fang t\u1ea1o th\u00e0nh c\u00e1c \u0111\u01b0\u1eddng cong, b\u1ea1n \u0111\u00e3 h\u00ecnh dung \u0111\u01b0\u1ee3c h\u00ecnh d\u1ea1ng c\u1ee7a <strong>tr\u01b0\u1eddng t\u1eeb<\/strong>\u2014v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 ph\u00e9p m\u00e0u th\u1ef1c s\u1ef1 \u0111\u1eb1ng sau c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nam ch\u00e2m.<\/p>\n<h2>Nh\u1eefng s\u1ef1 ki\u1ec7n l\u1ecbch s\u1eed th\u00fa v\u1ecb v\u1ec1 nam ch\u00e2m<\/h2>\n<p>Nam ch\u00e2m \u0111\u00e3 t\u1ed3n t\u1ea1i l\u00e2u h\u01a1n nhi\u1ec1u so v\u1edbi nh\u1eefng g\u00ec ch\u00fang ta nh\u1eadn th\u1ee9c. Nh\u1eefng nam ch\u00e2m t\u1ef1 nhi\u00ean \u0111\u1ea7u ti\u00ean l\u00e0 c\u00e1c kho\u00e1ng ch\u1ea5t g\u1ecdi l\u00e0 <strong>\u0111\u00e1 nam ch\u00e2m<\/strong> \u2014 c\u00e1c m\u1ea3nh magnetit c\u00f3 kh\u1ea3 n\u0103ng h\u00fat s\u1eaft. Ng\u01b0\u1eddi c\u1ed5 \u0111\u1ea1i \u1edf Vi\u1ec7t Nam v\u00e0 Trung Qu\u1ed1c \u0111\u00e3 ph\u00e1t hi\u1ec7n ra ch\u00fang t\u1eeb h\u00e0ng ngh\u00ecn n\u0103m tr\u01b0\u1edbc, v\u00e0 t\u00ean g\u1ecdi \u201cnam ch\u00e2m\u201d c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb khu v\u1ef1c Magnesia c\u1ee7a Hy L\u1ea1p, n\u01a1i ng\u01b0\u1eddi ta t\u00ecm th\u1ea5y nh\u1eefng vi\u00ean \u0111\u00e1 n\u00e0y.<\/p>\n<p>C\u00e1c n\u1ec1n v\u0103n minh c\u1ed5 \u0111\u1ea1i nhanh ch\u00f3ng t\u00ecm ra nh\u1eefng \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf c\u1ee7a nam ch\u00e2m. <strong>Thuy\u1ec1n tr\u01b0\u1edfng Trung Qu\u1ed1c<\/strong> l\u00e0 nh\u1eefng ng\u01b0\u1eddi \u0111\u1ea7u ti\u00ean s\u1eed d\u1ee5ng \u0111\u00e1 nam ch\u00e2m \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng, t\u1ea1o ra la b\u00e0n s\u01a1 khai \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn t\u00e0u thuy\u1ec1n t\u1eeb l\u00e2u tr\u01b0\u1edbc khi c\u00f3 GPS. Trong m\u1ed9t s\u1ed1 n\u1ec1n v\u0103n h\u00f3a c\u1ed5 \u0111\u1ea1i, nam ch\u00e2m c\u00f2n \u0111\u01b0\u1ee3c tin l\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1eefa b\u1ec7nh v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u00ecnh th\u1ee9c y h\u1ecdc s\u01a1 khai, m\u1eb7c d\u00f9 nh\u1eefng tuy\u00ean b\u1ed1 n\u00e0y ph\u1ea7n l\u1edbn l\u00e0 truy\u1ec1n thuy\u1ebft h\u01a1n l\u00e0 khoa h\u1ecdc \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh.<\/p>\n<p>Theo th\u1eddi gian, hi\u1ec3u bi\u1ebft v\u1ec1 t\u1eeb t\u00ednh \u0111\u00e3 th\u00fac \u0111\u1ea9y c\u00e1c ti\u1ebfn b\u1ed9 c\u00f4ng ngh\u1ec7 l\u1edbn. Vi\u1ec7c kh\u00e1m ph\u00e1 v\u00e0 nghi\u00ean c\u1ee9u c\u00e1c tr\u01b0\u1eddng t\u1eeb \u0111\u00e3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 ph\u00e1t minh c\u1ee7a <strong>m\u00e1y ph\u00e1t \u0111i\u1ec7n, \u0111\u1ed9ng c\u01a1, v\u00e0 h\u1ec7 th\u1ed1ng vi\u1ec5n th\u00f4ng<\/strong>. N\u1ebfu kh\u00f4ng c\u00f3 nam ch\u00e2m, ch\u00fang ta s\u1ebd kh\u00f4ng c\u00f3 l\u01b0\u1edbi \u0111i\u1ec7n hi\u1ec7n \u0111\u1ea1i, thi\u1ebft b\u1ecb \u00e2m thanh, ho\u1eb7c th\u1eadm ch\u00ed nhi\u1ec1u thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed h\u00e0ng ng\u00e0y m\u00e0 ng\u01b0\u1eddi Vi\u1ec7t tin d\u00f9ng ng\u00e0y nay.<\/p>\n<h2>C\u00e1c t\u00ednh ch\u1ea5t h\u1ea5p d\u1eabn c\u1ee7a nam ch\u00e2m<\/h2>\n<h3>C\u1ef1c nam ch\u00e2m v\u00e0 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a l\u1ef1c h\u00fat<\/h3>\n<p>M\u1ed7i nam ch\u00e2m c\u00f3 hai c\u1ef1c \u2014 c\u1ef1c B\u1eafc v\u00e0 c\u1ef1c Nam. <strong>Hai c\u1ef1c tr\u00e1i d\u1ea5u h\u00fat nhau<\/strong>, trong khi <strong>hai c\u1ef1c c\u00f9ng lo\u1ea1i \u0111\u1ea9y nhau<\/strong> xa kh\u1ecfi nhau. \u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao n\u1ebfu b\u1ea1n c\u1ed1 g\u1eafng \u0111\u1ea9y hai c\u1ef1c B\u1eafc l\u1ea1i g\u1ea7n nhau, b\u1ea1n s\u1ebd c\u1ea3m th\u1ea5y l\u1ef1c v\u00f4 h\u00ecnh n\u00e0y ch\u1ed1ng l\u1ea1i.<\/p>\n<h3>C\u00e1ch nam ch\u00e2m m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh c\u1ee7a ch\u00fang<\/h3>\n<p>Nam ch\u00e2m kh\u00f4ng ph\u1ea3i l\u00e0 v\u0129nh c\u1eedu. Ch\u00fang c\u00f3 th\u1ec3 y\u1ebfu \u0111i theo th\u1eddi gian do:<\/p>\n<ul>\n<li><strong>Nhi\u1ec7t \u0111\u1ed9 cao<\/strong> (tr\u00ean m\u1ed9t m\u1ee9c nh\u1ea5t \u0111\u1ecbnh, ch\u00fang m\u1ea5t \u0111i s\u1ef1 \u0111\u1ecbnh h\u01b0\u1edbng)<\/li>\n<li><strong>H\u01b0 h\u1ecfng v\u1eadt l\u00fd<\/strong> (b\u1ecb r\u01a1i ho\u1eb7c va \u0111\u1eadp)<\/li>\n<li><strong>C\u00e1c tr\u01b0\u1eddng t\u1eeb \u0111\u1ed1i l\u1eadp m\u1ea1nh<\/strong><br \/>\nB\u1ea1n c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh n\u00e0y b\u1eb1ng c\u00e1ch c\u1ea5t gi\u1eef nam ch\u00e2m tr\u00e1nh xa nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 gi\u1eef ch\u00fang xa c\u00e1c ngu\u1ed3n t\u1eeb m\u1ea1nh kh\u00e1c.<\/li>\n<\/ul>\n<h3>Nam ch\u00e2m m\u1ea1nh nh\u1ea5t v\u00e0 ch\u00fang \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb g\u00ec<\/h3>\n<p>Nh\u1eefng nam ch\u00e2m m\u1ea1nh nh\u1ea5t hi\u1ec7n nay l\u00e0 <strong>nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm<\/strong>, \u0111\u1eb7c bi\u1ec7t l\u00e0 <strong>nam ch\u00e2m neodymium<\/strong>. Ch\u00fang m\u1ea1nh h\u01a1n nhi\u1ec1u so v\u1edbi nam ch\u00e2m s\u1eaft ho\u1eb7c g\u1ed1m th\u00f4ng th\u01b0\u1eddng v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong m\u1ecdi th\u1ee9 t\u1eeb \u1ed5 c\u1ee9ng m\u00e1y t\u00ednh \u0111\u1ebfn \u0111\u1ed9ng c\u01a1 \u00f4 t\u00f4 \u0111i\u1ec7n.<\/p>\n<h3>\u0110i\u1ec3m Curie v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9<\/h3>\n<p>M\u1ecdi v\u1eadt li\u1ec7u t\u1eeb t\u00ednh \u0111\u1ec1u c\u00f3 <strong>nhi\u1ec7t \u0111\u1ed9 Curie<\/strong> \u2014 \u0111i\u1ec3m m\u00e0 t\u1ea1i \u0111\u00f3 n\u00f3 m\u1ea5t ho\u00e0n to\u00e0n kh\u1ea3 n\u0103ng t\u1eeb t\u00ednh. V\u00ed d\u1ee5, nam ch\u00e2m neodymium m\u1ea5t kh\u1ea3 n\u0103ng t\u1eeb t\u00ednh c\u1ee7a m\u00ecnh v\u00e0o kho\u1ea3ng <strong>310\u2013400\u00b0F<\/strong>. \u0110\u00f3 l\u00e0 l\u00fd do nhi\u1ec7t \u0111\u1ed9 cao l\u00e0 m\u1ed9t trong nh\u1eefng k\u1ebb th\u00f9 l\u1edbn nh\u1ea5t c\u1ee7a nam ch\u00e2m.<\/p>\n<h2>Nh\u1eefng s\u1ef1 th\u1eadt l\u1ea1 v\u00e0 vui v\u1ec1 nam ch\u00e2m<\/h2>\n<p>Nam ch\u00e2m kh\u00f4ng ch\u1ec9 \u0111\u1ec3 d\u00e1n ghi ch\u00fa l\u00ean t\u1ee7 l\u1ea1nh \u2014 c\u00f2n c\u00f3 nh\u1eefng \u0111i\u1ec1u b\u1ea5t ng\u1edd m\u00e0 ch\u00fang c\u00f3 th\u1ec3 l\u00e0m. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 s\u1ef1 th\u1eadt v\u1ec1 nam ch\u00e2m c\u00f3 th\u1ec3 khi\u1ebfn b\u1ea1n ng\u1ea1c nhi\u00ean:<\/p>\n<h2>\u1ee8ng d\u1ee5ng c\u1ee7a nam ch\u00e2m trong \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y v\u00e0 c\u00f4ng nghi\u1ec7p<\/h2>\n<p>Nam ch\u00e2m kh\u00f4ng ch\u1ec9 d\u00e0nh cho c\u00e1c th\u00ed nghi\u1ec7m khoa h\u1ecdc \u2014 ch\u00fang xu\u1ea5t hi\u1ec7n \u1edf nh\u1eefng n\u01a1i ch\u00fang ta s\u1eed d\u1ee5ng h\u00e0ng ng\u00e0y m\u00e0 kh\u00f4ng nh\u1eadn ra. Trong nh\u00e0, b\u1ea1n s\u1ebd th\u1ea5y ch\u00fang trong <strong>loa<\/strong> \u0111\u1ec3 c\u00f3 \u00e2m thanh r\u00f5 r\u00e0ng, b\u00ean trong <strong>c\u1eeda t\u1ee7 l\u1ea1nh<\/strong> \u0111\u1ec3 gi\u1eef ch\u00fang k\u00edn, v\u00e0 th\u1eadm ch\u00ed trong <strong>th\u1ebb t\u00edn d\u1ee5ng v\u00e0 th\u1ebb ghi n\u1ee3<\/strong> n\u01a1i c\u00e1c d\u1ea3i t\u1eeb l\u01b0u tr\u1eef d\u1eef li\u1ec7u quan tr\u1ecdng. H\u1ea7u h\u1ebft c\u00e1c <strong>\u0111i\u1ec7n tho\u1ea1i, m\u00e1y t\u00ednh x\u00e1ch tay v\u00e0 tai nghe<\/strong> hi\u1ec7n \u0111\u1ea1i c\u0169ng d\u1ef1a v\u00e0o c\u00e1c nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm nh\u1ecf, m\u1ea1nh \u0111\u1ec3 gi\u1eef cho ch\u00fang m\u1ecfng nh\u01b0ng v\u1eabn ho\u1ea1t \u0111\u1ed9ng t\u1ed1t.<\/p>\n<p>Trong ng\u00e0nh c\u00f4ng nghi\u1ec7p, nam ch\u00e2m l\u00e0 thi\u1ebft y\u1ebfu. <strong>m\u00e1y MRI<\/strong> s\u1eed d\u1ee5ng c\u00e1c tr\u01b0\u1eddng t\u1eeb m\u1ea1nh \u0111\u1ec3 t\u1ea1o ra h\u00ecnh \u1ea3nh chi ti\u1ebft c\u1ee7a c\u01a1 th\u1ec3 nh\u1eb1m ch\u1ea9n \u0111o\u00e1n y h\u1ecdc. <strong>M\u00e1y t\u00e1ch t\u1eeb<\/strong> lo\u1ea1i b\u1ecf c\u00e1c t\u1ea1p ch\u1ea5t kim lo\u1ea1i trong c\u00e1c nh\u00e0 m\u00e1y t\u00e1i ch\u1ebf, d\u00e2y chuy\u1ec1n ch\u1ebf bi\u1ebfn th\u1ef1c ph\u1ea9m v\u00e0 khai th\u00e1c m\u1ecf. Trong s\u1ea3n xu\u1ea5t, nam ch\u00e2m l\u00e0 th\u00e0nh ph\u1ea7n c\u1ee7a \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn v\u00e0 d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c d\u00f9ng \u0111\u1ec3 duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng tr\u01a1n tru c\u1ee7a d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t.<\/p>\n<p>Nam ch\u00e2m c\u0169ng \u0111\u00f3ng vai tr\u00f2 trong vi\u1ec7c cung c\u1ea5p v\u1eadt li\u1ec7u cho nhi\u1ec1u ng\u00e0nh kh\u00e1c nhau. <strong>Nam ch\u00e2m neodymium v\u00e0 samarium-cobalt<\/strong> \u0111ang c\u00f3 nhu c\u1ea7u cao trong l\u0129nh v\u1ef1c \u0111i\u1ec7n t\u1eed, h\u00e0ng kh\u00f4ng v\u0169 tr\u1ee5 v\u00e0 h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o. C\u00e1c nh\u00e0 cung c\u1ea5p <strong>v\u1eadt li\u1ec7u t\u1eeb \u0111\u00e1ng tin c\u1eady<\/strong> cung c\u1ea5p nh\u1eefng v\u1eadt li\u1ec7u n\u00e0y cho c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t tr\u00ean kh\u1eafp Vi\u1ec7t Nam, \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng cao cho c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng.<\/p>\n<p>Khi n\u00f3i \u0111\u1ebfn c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i, nam ch\u00e2m \u0111ang d\u1eabn \u0111\u1ea7u trong vi\u1ec7c th\u00fac \u0111\u1ea9y n\u0103ng l\u01b0\u1ee3ng s\u1ea1ch h\u01a1n. Ch\u00fang l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a <strong>tuabin gi\u00f3<\/strong>, <strong>\u0111\u1ed9ng c\u01a1 xe \u0111i\u1ec7n<\/strong>, v\u00e0 th\u1eadm ch\u00ed h\u1ec7 th\u1ed1ng s\u1ea1c kh\u00f4ng d\u00e2y (<a href=\"https:\/\/nbaem.com\/vi\/magnets-and-wireless-charging\/\" target=\"_blank\" rel=\"noopener\">xem c\u00e1ch nam ch\u00e2m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u1ea1c kh\u00f4ng d\u00e2y<\/a>). V\u1edbi nh\u1eefng ti\u1ebfn b\u1ed9 trong <strong>nam ch\u00e2m ch\u1ecbu nhi\u1ec7t cao<\/strong> (<a href=\"https:\/\/nbaem.com\/vi\/which-magnets-can-withstand-high-temperatures\/\" target=\"_blank\" rel=\"noopener\">t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 nam ch\u00e2m c\u00f3 th\u1ec3 ch\u1ecbu nhi\u1ec7t<\/a>), c\u00f4ng ngh\u1ec7 m\u1edbi ng\u00e0y c\u00e0ng hi\u1ec7u qu\u1ea3 v\u00e0 b\u1ec1n l\u00e2u h\u01a1n.<\/p>\n<h2>C\u00e1ch s\u1ea3n xu\u1ea5t nam ch\u00e2m - Hi\u1ec3u r\u00f5 quy tr\u00ecnh ch\u1ebf t\u1ea1o<\/h2>\n<p>S\u1ea3n xu\u1ea5t nam ch\u00e2m kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 \u0111\u1ecbnh h\u00ecnh kim lo\u1ea1i \u2014 \u0111\u00f3 l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa \u0111\u1ed9 ch\u00ednh x\u00e1c, v\u1eadt li\u1ec7u ph\u00f9 h\u1ee3p v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng nghi\u00eam ng\u1eb7t. Qu\u00e1 tr\u00ecnh ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i nam ch\u00e2m, nh\u01b0ng h\u1ea7u h\u1ebft \u0111\u1ec1u tr\u1ea3i qua c\u00e1c b\u01b0\u1edbc chung sau:<\/p>\n<h3>Quy tr\u00ecnh s\u1ea3n xu\u1ea5t nam ch\u00e2m \u0111\u01a1n gi\u1ea3n<\/h3>\n<ol>\n<li><strong>Chu\u1ea9n b\u1ecb v\u1eadt li\u1ec7u<\/strong> \u2013 C\u00e1c v\u1eadt li\u1ec7u c\u01a1 b\u1ea3n, nh\u01b0 s\u1eaft, cobalt ho\u1eb7c c\u00e1c nguy\u00ean t\u1ed1 \u0111\u1ea5t hi\u1ebfm nh\u01b0 neodymium, \u0111\u01b0\u1ee3c \u0111o l\u01b0\u1eddng v\u00e0 pha tr\u1ed9n theo t\u1ef7 l\u1ec7 ch\u00ednh x\u00e1c.<\/li>\n<li><strong>\u0110\u1ecbnh h\u00ecnh<\/strong> \u2013 V\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c nung ch\u1ea3y ho\u1eb7c \u00e9p th\u00e0nh h\u00ecnh d\u1ea1ng, t\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i nam ch\u00e2m. V\u00ed d\u1ee5, kim lo\u1ea1i d\u1ea1ng b\u1ed9t th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e9p v\u00e0o khu\u00f4n.<\/li>\n<li><strong>Nam ch\u00e2m h\u00f3a<\/strong> \u2013 Sau khi ngu\u1ed9i v\u00e0 \u0111\u1ecbnh h\u00ecnh, m\u1ed9t tr\u01b0\u1eddng t\u1eeb m\u1ea1nh \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 c\u0103n ch\u1ec9nh c\u00e1c nguy\u00ean t\u1eed, c\u1ed1 \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb c\u1ee7a ch\u00fang.<\/li>\n<li><strong>L\u1edbp ph\u1ee7 ho\u1eb7c ho\u00e0n thi\u1ec7n<\/strong> \u2013 Nam ch\u00e2m th\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u1ee7 l\u1edbp (niken, epoxy ho\u1eb7c l\u1edbp ho\u00e0n thi\u1ec7n kh\u00e1c) \u0111\u1ec3 ng\u0103n ng\u1eeba \u0103n m\u00f2n v\u00e0 n\u00e2ng cao \u0111\u1ed9 b\u1ec1n.<\/li>\n<\/ol>\n<h3>T\u1ea1i sao ch\u1ea5t l\u01b0\u1ee3ng v\u1eadt li\u1ec7u v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c l\u1ea1i quan tr\u1ecdng<\/h3>\n<ul>\n<li>V\u1eadt li\u1ec7u r\u1ebb ti\u1ec1n ho\u1eb7c kh\u00f4ng tinh khi\u1ebft t\u1ea1o ra nam ch\u00e2m y\u1ebfu h\u01a1n.<\/li>\n<li>Nh\u1eefng l\u1ed7i nh\u1ecf trong h\u00ecnh d\u1ea1ng ho\u1eb7c c\u0103n ch\u1ec9nh c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng.<\/li>\n<li><strong>Nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm<\/strong>, nh\u01b0 neodymium, \u0111\u00f2i h\u1ecfi ti\u00eau chu\u1ea9n s\u1ea3n xu\u1ea5t ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00f4ng su\u1ea5t t\u1ed1i \u0111a v\u00e0 tu\u1ed5i th\u1ecd cao.<\/li>\n<\/ul>\n<h3>Vai tr\u00f2 c\u1ee7a chuy\u00ean m\u00f4n v\u00e0 ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng<\/h3>\n<p>C\u00e1c nh\u00e0 cung c\u1ea5p v\u1eadt li\u1ec7u t\u1eeb h\u00e0ng \u0111\u1ea7u s\u1eed d\u1ee5ng:<\/p>\n<ul>\n<li>D\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c cao \u0111\u1ec3 gi\u1eef k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c.<\/li>\n<li>Ki\u1ec3m tra nghi\u00eam ng\u1eb7t \u0111\u1ec3 ki\u1ec3m tra l\u1ef1c k\u00e9o, gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 v\u00e0 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb t\u00ednh.<\/li>\n<li>K\u1ef9 thu\u1eadt s\u1ea3n xu\u1ea5t nh\u1ea5t qu\u00e1n \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u1ea3 nhu c\u1ea7u ti\u00eau d\u00f9ng v\u00e0 c\u00f4ng nghi\u1ec7p.<\/li>\n<\/ul>\n<p>N\u1ebfu b\u1ea1n \u0111ang t\u00ecm ngu\u1ed3n cung \u1ee9ng cho c\u00e1c d\u1ef1 \u00e1n s\u1ea3n xu\u1ea5t ho\u1eb7c c\u00f4ng ngh\u1ec7, l\u00e0m vi\u1ec7c v\u1edbi m\u1ed9t <strong>nh\u00e0 cung c\u1ea5p v\u1eadt li\u1ec7u t\u1eeb t\u00ednh<\/strong> l\u00e0 \u0111i\u1ec1u c\u1ef1c k\u1ef3 quan tr\u1ecdng \u2014 \u0111\u1eb7c bi\u1ec7t khi l\u1ef1a ch\u1ecdn gi\u1eefa c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 <strong>nam ch\u00e2m samarium cobalt v\u00e0 neodymium<\/strong> (<strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/samarium-cobalt-vs-neodymium-magnets\/\" target=\"_blank\" rel=\"noopener\">xem so s\u00e1nh chi ti\u1ebft t\u1ea1i \u0111\u00e2y<\/a><\/span><\/strong>).<\/p>\n<h2>Nh\u1eefng \u0111i\u1ec1u m\u00ea t\u00edn v\u00e0 hi\u1ec3u l\u1ea7m v\u1ec1 nam ch\u00e2m<\/h2>\n<h3>Kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 kim lo\u1ea1i \u0111\u1ec1u b\u1ecb nam ch\u00e2m h\u00fat<\/h3>\n<p>M\u1ed9t trong nh\u1eefng hi\u1ec3u l\u1ea7m l\u1edbn nh\u1ea5t l\u00e0 nam ch\u00e2m d\u00ednh v\u00e0o b\u1ea5t k\u1ef3 kim lo\u1ea1i n\u00e0o. Tr\u00ean th\u1ef1c t\u1ebf, nam ch\u00e2m ch\u1ec9 h\u00fat m\u1ed9t s\u1ed1 kim lo\u1ea1i nh\u1ea5t \u0111\u1ecbnh nh\u01b0 <strong>s\u1eaft, niken v\u00e0 cobalt<\/strong>. Nhi\u1ec1u kim lo\u1ea1i ph\u1ed5 bi\u1ebfn, ch\u1eb3ng h\u1ea1n nh\u01b0 <strong>nh\u00f4m, \u0111\u1ed3ng, v\u00e0ng v\u00e0 b\u1ea1c<\/strong>, ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 t\u00ednh t\u1eeb. V\u00ed d\u1ee5, lon n\u01b0\u1edbc ng\u1ecdt nh\u00f4m c\u1ee7a b\u1ea1n s\u1ebd kh\u00f4ng d\u00ednh nam ch\u00e2m, nh\u01b0ng lon th\u00e9p th\u00ec c\u00f3.<\/p>\n<h3>Nam ch\u00e2m kh\u00f4ng nguy hi\u1ec3m tr\u1eeb khi s\u1eed d\u1ee5ng sai c\u00e1ch<\/h3>\n<p>M\u1ed9t hi\u1ec3u l\u1ea7m kh\u00e1c l\u00e0 t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i nam ch\u00e2m \u0111\u1ec1u nguy hi\u1ec3m khi \u0111\u1ec3 g\u1ea7n. Nam ch\u00e2m nh\u1ecf \u0111\u1ec3 t\u1ee7 l\u1ea1nh th\u00ec v\u00f4 h\u1ea1i, nh\u01b0ng <strong>nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm m\u1ea1nh m\u1ebd<\/strong> nh\u01b0 neodymium c\u00f3 th\u1ec3 \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 k\u1eb9p da, l\u00e0m h\u1ecfng thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed ho\u1eb7c th\u1eadm ch\u00ed v\u1ee1 n\u1ebfu ch\u00fang va v\u00e0o nhau.<\/p>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 an to\u00e0n c\u1ea7n ghi nh\u1edb<\/h3>\n<ul>\n<li><strong>Tr\u00e1nh ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed<\/strong> \u2014 nam ch\u00e2m m\u1ea1nh c\u00f3 th\u1ec3 x\u00f3a d\u1eef li\u1ec7u tr\u00ean th\u1ebb t\u00edn d\u1ee5ng v\u00e0 l\u00e0m r\u1ed1i lo\u1ea1n la b\u00e0n \u0111i\u1ec7n tho\u1ea1i.<\/li>\n<li><strong>Gi\u1eef xa m\u00e1y t\u1ea1o nh\u1ecbp tim ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb y t\u1ebf c\u1ea5y gh\u00e9p<\/strong>, v\u00ec tr\u01b0\u1eddng t\u1eeb c\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u ch\u00fang.<\/li>\n<li><strong>X\u1eed l\u00fd c\u00e1c nam ch\u00e2m l\u1edbn c\u1ea9n th\u1eadn<\/strong> \u2014 l\u1ef1c c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 g\u00e2y th\u01b0\u01a1ng t\u00edch n\u1ebfu ng\u00f3n tay ho\u1eb7c da b\u1ecb k\u1eb9t.<\/li>\n<li><strong>L\u01b0u tr\u1eef ri\u00eang bi\u1ec7t<\/strong> trong c\u00e1c h\u1ed9p \u0111\u1ec7m \u0111\u1ec3 tr\u00e1nh h\u01b0 h\u1ecfng t\u00ecnh c\u1edd.<\/li>\n<\/ul>\n<h2>C\u00e1ch ki\u1ec3m tra v\u00e0 s\u1eed d\u1ee5ng nam ch\u00e2m an to\u00e0n<\/h2>\n<h3>C\u00e1c th\u00ed nghi\u1ec7m DIY \u0111\u01a1n gi\u1ea3n<\/h3>\n<p>B\u1ea1n kh\u00f4ng c\u1ea7n ph\u00f2ng th\u00ed nghi\u1ec7m \u0111\u1ec3 kh\u00e1m ph\u00e1 t\u00ednh ch\u1ea5t t\u1eeb tr\u01b0\u1eddng\u2014ch\u1ec9 c\u1ea7n c\u00e1c v\u1eadt d\u1ee5ng c\u01a1 b\u1ea3n t\u1ea1i nh\u00e0 ho\u1eb7c tr\u01b0\u1eddng h\u1ecdc. M\u1ed9t v\u00e0i \u00fd t\u01b0\u1edfng \u0111\u01a1n gi\u1ea3n:<\/p>\n<ul>\n<li><strong>Th\u1eed nghi\u1ec7m k\u1eb9p gi\u1ea5y:<\/strong> Xem nam ch\u00e2m c\u00f3 th\u1ec3 n\u00e2ng \u0111\u01b0\u1ee3c bao nhi\u00eau k\u1eb9p gi\u1ea5y. Th\u1eed c\u00e1c lo\u1ea1i nam ch\u00e2m kh\u00e1c nhau v\u00e0 so s\u00e1nh k\u1ebft qu\u1ea3.<\/li>\n<li><strong>Nam ch\u00e2m v\u00e0 la b\u00e0n:<\/strong> Di chuy\u1ec3n m\u1ed9t nam ch\u00e2m g\u1ea7n la b\u00e0n v\u00e0 quan s\u00e1t kim ch\u1ec9 l\u1ec7ch, th\u1ec3 hi\u1ec7n tr\u01b0\u1eddng t\u1eeb.<\/li>\n<li><strong>Th\u1eed qua v\u1eadt li\u1ec7u:<\/strong> \u0110\u1eb7t c\u00e1c v\u1eadt li\u1ec7u m\u1ecfng nh\u01b0 b\u00eca c\u1ee9ng ho\u1eb7c nh\u1ef1a gi\u1eefa nam ch\u00e2m v\u00e0 kim lo\u1ea1i \u0111\u1ec3 xem li\u1ec7u l\u1ef1c h\u00fat v\u1eabn c\u00f2n ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng.<\/li>\n<li><strong>T\u1ea1o m\u1ed9t nam ch\u00e2m \u0111i\u1ec7n \u0111\u01a1n gi\u1ea3n:<\/strong> Qu\u1ea5n d\u00e2y \u0111\u1ed3ng c\u00e1ch \u0111i\u1ec7n quanh m\u1ed9t chi\u1ebfc \u0111inh, k\u1ebft n\u1ed1i v\u1edbi pin, v\u00e0 th\u1eed xem n\u00f3 c\u00f3 th\u1ec3 nh\u1eb7t g\u00ec l\u00ean kh\u00f4ng. <em>(C\u1ea7n c\u00f3 s\u1ef1 gi\u00e1m s\u00e1t c\u1ee7a ng\u01b0\u1eddi l\u1edbn.)<\/em><\/li>\n<\/ul>\n<p>\u0110\u1ec3 c\u00f3 th\u00eam \u00fd t\u01b0\u1edfng, h\u00e3y xem h\u01b0\u1edbng d\u1eabn n\u00e0y v\u1ec1<strong><span style=\"color: #ff6600;\"> <a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/10-uses-of-magnets\/\" target=\"_blank\" rel=\"noopener\">10 c\u00e1ch s\u1eed d\u1ee5ng nam ch\u00e2m<\/a> <\/span>t<\/strong>\u0111\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c \u1ee9ng d\u1ee5ng h\u00e0ng ng\u00e0y.<\/p>\n<h3>H\u01b0\u1edbng d\u1eabn x\u1eed l\u00fd nam ch\u00e2m m\u1ea1nh<\/h3>\n<p>M\u1ed9t s\u1ed1 nam ch\u00e2m, \u0111\u1eb7c bi\u1ec7t l\u00e0 nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm nh\u01b0 <strong>nam ch\u00e2m neodymium<\/strong>, c\u1ef1c k\u1ef3 m\u1ea1nh m\u1ebd v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd c\u1ea9n th\u1eadn.<\/p>\n<ul>\n<li><strong>Gi\u1eef ng\u00f3n tay tr\u00e1nh xa:<\/strong> Nam ch\u00e2m m\u1ea1nh c\u00f3 th\u1ec3 k\u1eb9p ch\u1eb7t n\u1ebfu ch\u00fang va v\u00e0o nhau.<\/li>\n<li><strong>Tr\u00e1nh ti\u1ebfp x\u00fac v\u1edbi \u0111i\u1ec7n t\u1eed:<\/strong> Gi\u1eef ch\u00fang xa th\u1ebb t\u00edn d\u1ee5ng, \u0111i\u1ec7n tho\u1ea1i v\u00e0 \u1ed5 c\u1ee9ng \u0111\u1ec3 tr\u00e1nh m\u1ea5t d\u1eef li\u1ec7u.<\/li>\n<li><strong>B\u1ea3o v\u1ec7 b\u1ec1 m\u1eb7t:<\/strong> Ch\u00fang c\u00f3 th\u1ec3 b\u1ecb s\u1ee9t m\u1ebb ho\u1eb7c v\u1ee1 n\u1ebfu va v\u00e0o kim lo\u1ea1i ho\u1eb7c nam ch\u00e2m kh\u00e1c.<\/li>\n<li><strong>L\u01b0u tr\u1eef c\u00f3 c\u00e1ch ng\u0103n c\u00e1ch:<\/strong> \u0110\u1eb7t m\u1ed9t v\u1eadt ph\u00e2n c\u00e1ch kh\u00f4ng ph\u1ea3i kim lo\u1ea1i gi\u1eefa c\u00e1c nam ch\u00e2m \u0111\u1ec3 l\u01b0u tr\u1eef.<\/li>\n<li><strong>An to\u00e0n cho tr\u1ebb em:<\/strong> Gi\u1eef nam ch\u00e2m nh\u1ecf ngo\u00e0i t\u1ea7m v\u1edbi \u2014 ch\u00fang c\u00f3 th\u1ec3 nguy hi\u1ec3m n\u1ebfu nu\u1ed1t ph\u1ea3i.<\/li>\n<li><strong>B\u1ea3o v\u1ec7 m\u1eaft:<\/strong> \u0110\u1ed9i k\u00ednh b\u1ea3o h\u1ed9 khi th\u1eed nghi\u1ec7m nam ch\u00e2m l\u1edbn ho\u1eb7c m\u1ea1nh \u0111\u1ec3 tr\u00e1nh b\u1ecb th\u01b0\u01a1ng do m\u1ea3nh v\u1ee5n bay v\u00e0o.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Kh\u00e1m ph\u00e1 nh\u1eefng s\u1ef1 th\u1eadt th\u00fa v\u1ecb v\u1ec1 nam ch\u00e2m, l\u1ecbch s\u1eed, \u0111\u1eb7c t\u00ednh, c\u00f4ng d\u1ee5ng v\u00e0 c\u00e1ch NBAEM t\u1ea1o ra c\u00e1c v\u1eadt li\u1ec7u t\u1eeb ch\u1ea5t l\u01b0\u1ee3ng cao<\/p>","protected":false},"author":1,"featured_media":1893,"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-1870","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\/cool-facts-about-magnets.jpg","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1870","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=1870"}],"version-history":[{"count":4,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1870\/revisions"}],"predecessor-version":[{"id":1891,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1870\/revisions\/1891"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1893"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1870"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1870"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}