{"id":2057,"date":"2025-09-01T05:57:57","date_gmt":"2025-09-01T05:57:57","guid":{"rendered":"https:\/\/nbaem.com\/?p=2057"},"modified":"2025-09-01T06:22:10","modified_gmt":"2025-09-01T06:22:10","slug":"how-long-does-neodymium-magnets-last","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/how-long-does-neodymium-magnets-last\/","title":{"rendered":"Th\u1eddi gian nam ch\u00e2m Neodymium t\u1ed3n t\u1ea1i v\u00e0 nh\u1eefng y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u00fang"},"content":{"rendered":"<p>T\u1ef1 h\u1ecfi <strong>nam ch\u00e2m neodymium t\u1ed3n t\u1ea1i \u0111\u01b0\u1ee3c bao l\u00e2u<\/strong> tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u m\u1ea5t \u0111i s\u1ee9c m\u1ea1nh c\u1ee7a ch\u00fang? B\u1ea1n kh\u00f4ng \u0111\u01a1n \u0111\u1ed9c. Nh\u1eefng nam ch\u00e2m c\u1ef1c k\u1ef3 m\u1ea1nh n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf kh\u1eafp m\u1ecdi n\u01a1i\u2014t\u1eeb c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p c\u00f4ng ngh\u1ec7 cao \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb h\u00e0ng ng\u00e0y\u2014nh\u01b0ng <strong>tu\u1ed5i th\u1ecd<\/strong> kh\u00f4ng ph\u1ea3i l\u00e0 v\u00f4 h\u1ea1n. S\u1ef1 th\u1eadt l\u00e0, v\u1edbi s\u1ef1 ch\u0103m s\u00f3c \u0111\u00fang c\u00e1ch, m\u1ed9t nam ch\u00e2m neodymium ch\u1ea5t l\u01b0\u1ee3ng c\u00f3 th\u1ec3 gi\u1eef \u0111\u01b0\u1ee3c ph\u1ea7n l\u1edbn s\u1ee9c m\u1ea1nh c\u1ee7a n\u00f3 trong <strong>h\u00e0ng th\u1eadp k\u1ef7<\/strong>, tuy nhi\u00ean m\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 nh\u01b0 <strong>nhi\u1ec7t, \u0103n m\u00f2n, v\u00e0 h\u01b0 h\u1ecfng v\u1eadt l\u00fd<\/strong> c\u00f3 th\u1ec3 r\u00fat ng\u1eafn th\u1eddi gian \u0111\u00f3 nhanh ch\u00f3ng. Trong h\u01b0\u1edbng d\u1eabn n\u00e0y, t\u00f4i s\u1ebd ph\u00e2n t\u00edch ch\u00ednh x\u00e1c nh\u1eefng y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n c\u1ee7a ch\u00fang, c\u00e1ch gi\u1eef cho ch\u00fang ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c t\u1ed1i \u01b0u, v\u00e0 khi n\u00e0o b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y s\u1ef1 gi\u1ea3m hi\u1ec7u su\u1ea5t.<\/p>\n<h2>Nam ch\u00e2m Neodymium l\u00e0 g\u00ec<\/h2>\n<p>N\u1ebfu b\u1ea1n t\u1eebng t\u1ef1 h\u1ecfi t\u1ea1i sao m\u1ed9t s\u1ed1 nam ch\u00e2m c\u1ea3m th\u1ea5y c\u1ef1c k\u1ef3 m\u1ea1nh m\u1ebd so v\u1edbi k\u00edch th\u01b0\u1edbc c\u1ee7a ch\u00fang, kh\u1ea3 n\u0103ng cao l\u00e0 b\u1ea1n \u0111\u00e3 g\u1eb7p ph\u1ea3i <strong>nam ch\u00e2m neodymium<\/strong>. \u0110\u00e2y l\u00e0 m\u1ed9t lo\u1ea1i <strong>ng\u00e0nh c\u00f4ng nghi\u1ec7p nam ch\u00e2m \u0111\u1ea5t hi\u1ebfm<\/strong>, ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb h\u1ee3p kim c\u1ee7a <strong>neodymium, s\u1eaft, v\u00e0 boron (NdFeB)<\/strong>. Th\u00e0nh ph\u1ea7n n\u00e0y mang l\u1ea1i cho ch\u00fang s\u1ee9c m\u1ea1nh v\u01b0\u1ee3t tr\u1ed9i\u2014nhi\u1ec1u l\u1ea7n m\u1ea1nh h\u01a1n c\u00e1c lo\u1ea1i nam ch\u00e2m ferrite ho\u1eb7c g\u1ed1m th\u00f4ng th\u01b0\u1eddng c\u00f9ng k\u00edch th\u01b0\u1edbc.<\/p>\n<p>Nam ch\u00e2m neodymium ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch c\u0103n ch\u1ec9nh c\u00e1c mi\u1ec1n t\u1eeb trong h\u1ee3p kim theo m\u1ed9t h\u01b0\u1edbng c\u1ed1 \u0111\u1ecbnh trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t. Khi \u0111\u00e3 \u0111\u01b0\u1ee3c magnet h\u00f3a, ch\u00fang t\u1ea1o ra m\u1ed9t tr\u01b0\u1eddng t\u1eeb m\u1ea1nh m\u1ebd v\u00e0 \u1ed5n \u0111\u1ecbnh, \u0111i\u1ec1u n\u00e0y khi\u1ebfn ch\u00fang l\u00fd t\u01b0\u1edfng cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n s\u1ee9c m\u1ea1nh cao trong m\u1ed9t h\u00ecnh d\u1ea1ng nh\u1ecf g\u1ecdn.<\/p>\n<p>Ch\u00fang \u0111\u01b0\u1ee3c \u01b0u ti\u00ean h\u01a1n c\u00e1c lo\u1ea1i nam ch\u00e2m kh\u00e1c v\u00ec m\u1ed9t s\u1ed1 l\u00fd do ch\u00ednh:<\/p>\n<ul>\n<li><strong>T\u1ec9 l\u1ec7 s\u1ee9c m\u1ea1nh so v\u1edbi k\u00edch th\u01b0\u1edbc kh\u00f4ng \u0111\u1ed1i th\u1ee7<\/strong> \u2013 Ch\u00fang c\u00f3 th\u1ec3 n\u00e2ng h\u00e0ng tr\u0103m ho\u1eb7c th\u1eadm ch\u00ed h\u00e0ng ngh\u00ecn l\u1ea7n tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a ch\u00ednh ch\u00fang.<\/li>\n<li><strong>\u0110a d\u1ea1ng<\/strong> \u2013 Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t v\u1edbi nhi\u1ec1u h\u00ecnh d\u1ea1ng, k\u00edch th\u01b0\u1edbc v\u00e0 c\u1ea5p \u0111\u1ed9 kh\u00e1c nhau.<\/li>\n<li><strong>\u0110\u1ed9 tin c\u1eady<\/strong> \u2013 Khi \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111oan v\u00e0 \u0103n m\u00f2n, ch\u00fang duy tr\u00ec hi\u1ec7u su\u1ea5t c\u1ee7a m\u00ecnh trong nhi\u1ec1u n\u0103m.<\/li>\n<\/ul>\n<p>Trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1ef1c t\u1ebf, nam ch\u00e2m neodymium xu\u1ea5t hi\u1ec7n \u1edf kh\u1eafp n\u01a1i\u2014t\u1eeb m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p v\u00e0 thi\u1ebft b\u1ecb y t\u1ebf \u0111\u1ebfn h\u1ec7 th\u1ed1ng \u00e2m thanh v\u00e0 \u0111\u1ed9ng c\u01a1 \u0111i\u1ec7n. B\u1ea1n c\u0169ng s\u1ebd th\u1ea5y ch\u00fang trong c\u00e1c turbine gi\u00f3, d\u1ee5ng c\u1ee5 ch\u00ednh x\u00e1c, v\u00e0 th\u1eadm ch\u00ed c\u00e1c thi\u1ebft b\u1ecb gia \u0111\u00ecnh \u0111\u01a1n gi\u1ea3n nh\u01b0 m\u00f3c t\u1eeb v\u00e0 gi\u00e1 \u0111\u1ee1 \u0111i\u1ec7n tho\u1ea1i. Trong c\u00e1c c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn, ch\u00fang l\u00e0 th\u00e0nh ph\u1ea7n then ch\u1ed1t trong <strong>\u0111\u1ed9ng c\u01a1 hi\u1ec7u qu\u1ea3 cao<\/strong> v\u00e0 <strong>h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o<\/strong>, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 nh\u1eefng m\u00f4 t\u1ea3 trong <strong><span style=\"color: #ff6600;\"><a style=\"color: #ff6600;\" href=\"https:\/\/nbaem.com\/vi\/magnets-in-wind-turbines\/\" target=\"_blank\" rel=\"noopener\">nam ch\u00e2m trong turbine gi\u00f3<\/a><\/span><\/strong>.<\/p>\n<p>Ch\u00fang \u0111\u00e3 tr\u1edf th\u00e0nh lo\u1ea1i nam ch\u00e2m \u0111\u01b0\u1ee3c c\u00e1c k\u1ef9 s\u01b0, nh\u00e0 thi\u1ebft k\u1ebf s\u1ea3n ph\u1ea9m v\u00e0 ng\u01b0\u1eddi \u0111am m\u00ea l\u1ef1a ch\u1ecdn v\u00ec ch\u00fang ch\u1ee9a \u0111\u1ef1ng nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng trong m\u1ed9t k\u00edch th\u01b0\u1edbc nh\u1ecf g\u1ecdn. V\u00e0 ch\u00ednh v\u00ec v\u1eady, hi\u1ec3u r\u00f5 v\u1ec1 <strong>\u0111\u1ed9 b\u1ec1n v\u00e0 tu\u1ed5i th\u1ecd<\/strong> c\u1ee7a ch\u00fang l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai l\u00e0m vi\u1ec7c v\u1edbi ho\u1eb7c d\u1ef1a v\u00e0o ch\u00fang.<\/p>\n<h2>Tu\u1ed5i th\u1ecd d\u1ef1 ki\u1ebfn c\u1ee7a nam ch\u00e2m Neodymium<\/h2>\n<p>Trong \u0111i\u1ec1u ki\u1ec7n l\u00fd t\u01b0\u1edfng, <strong>nam ch\u00e2m neodymium<\/strong> c\u00f3 th\u1ec3 gi\u1eef ph\u1ea7n l\u1edbn s\u1ee9c m\u1ea1nh t\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u00ecnh trong <strong>h\u01a1n 20 n\u0103m<\/strong>, v\u00e0 trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, c\u00f2n l\u00e2u h\u01a1n n\u1eefa. V\u1ec1 m\u1eb7t v\u1eadt l\u00fd, nam ch\u00e2m t\u1ef1 n\u00f3 c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i h\u00e0ng th\u1eadp k\u1ef7 n\u1ebfu kh\u00f4ng ti\u1ebfp x\u00fac v\u1edbi m\u00f4i tr\u01b0\u1eddng g\u00e2y h\u1ea1i, nh\u01b0ng <em>\u0111\u1ed9 m\u1ea1nh t\u1eeb tr\u01b0\u1eddng<\/em> kh\u00f4ng gi\u1ed1ng nh\u01b0 tu\u1ed5i th\u1ecd v\u1eadt l\u00fd.<\/p>\n<p>Nam ch\u00e2m neodymium t\u1ef1 nhi\u00ean m\u1ea5t \u0111i m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf s\u1ee9c m\u1ea1nh theo th\u1eddi gian \u2014 th\u01b0\u1eddng \u00edt h\u01a1n <strong>1% m\u1ed7i th\u1eadp k\u1ef7<\/strong> khi \u0111\u01b0\u1ee3c b\u1ea3o qu\u1ea3n trong \u0111i\u1ec1u ki\u1ec7n t\u1ed1i \u01b0u. Qu\u00e1 tr\u00ecnh gi\u1ea3m ch\u1eadm n\u00e0y c\u00f3 ngh\u0129a l\u00e0 \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng trong gia \u0111\u00ecnh, x\u01b0\u1edfng ho\u1eb7c c\u00f4ng nghi\u1ec7p, b\u1ea1n s\u1ebd kh\u00f4ng nh\u1eadn th\u1ea5y s\u1ef1 thay \u0111\u1ed5i v\u1ec1 l\u1ef1c h\u00fat trong nhi\u1ec1u n\u0103m. Tuy nhi\u00ean, ti\u1ebfp x\u00fac v\u1edbi nhi\u1ec7t \u0111\u1ed9 c\u1ef1c \u0111oan, \u0103n m\u00f2n ho\u1eb7c t\u1eeb tr\u01b0\u1eddng \u0111\u1ed1i l\u1eadp m\u1ea1nh c\u00f3 th\u1ec3 th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh suy gi\u1ea3m n\u00e0y.<\/p>\n<p><strong>Ph\u00e2n t\u00edch tu\u1ed5i th\u1ecd theo c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau:<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th>\u0110i\u1ec1u ki\u1ec7n<\/th>\n<th>Tu\u1ed5i th\u1ecd t\u1eeb tr\u01b0\u1eddng trung b\u00ecnh<\/th>\n<th>Ghi ch\u00fa<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>T\u1ed1i \u01b0u<\/strong> \u2013 Nhi\u1ec7t \u0111\u1ed9 ph\u00f2ng (68\u00b0F), \u0111\u1ed9 \u1ea9m th\u1ea5p, x\u1eed l\u00fd nh\u1eb9 nh\u00e0ng<\/td>\n<td>H\u01a1n 20 n\u0103m<\/td>\n<td>M\u1ea5t \u00edt h\u01a1n 1% m\u1ed7i th\u1eadp k\u1ef7<\/td>\n<\/tr>\n<tr>\n<td><strong>Nhi\u1ec7t \u0111\u1ed9 cao<\/strong> \u2013 Th\u01b0\u1eddng xuy\u00ean tr\u00ean 176\u00b0F<\/td>\n<td>1\u20135 n\u0103m<\/td>\n<td>M\u1ea5t \u0111\u1ed9 b\u1ec1n nhanh ch\u00f3ng<\/td>\n<\/tr>\n<tr>\n<td><strong>M\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c \u0103n m\u00f2n<\/strong> (kh\u00f4ng l\u1edbp ph\u1ee7)<\/td>\n<td>V\u00e0i th\u00e1ng \u0111\u1ebfn v\u00e0i n\u0103m<\/td>\n<td>G\u1ec9 s\u00e9t v\u00e0 \u0103n m\u00f2n l\u00e0m y\u1ebfu nam ch\u00e2m<\/td>\n<\/tr>\n<tr>\n<td><strong>\u00c1p l\u1ef1c c\u01a1 h\u1ecdc n\u1eb7ng<\/strong><\/td>\n<td>Thay \u0111\u1ed5i<\/td>\n<td>N\u1ee9t ho\u1eb7c s\u1ee9t m\u1ebb g\u00e2y h\u1ecfng \u0111\u1ed9t ng\u1ed9t<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>H\u00e3y ngh\u0129 theo c\u00e1ch n\u00e0y \u2014 n\u1ebfu b\u1ea1n gi\u1eef ch\u00fang s\u1ea1ch s\u1ebd, kh\u00f4 r\u00e1o v\u00e0 tr\u00e1nh nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c l\u1ef1c qu\u00e1 m\u1ee9c, nam ch\u00e2m neodymium s\u1ebd gi\u1eef l\u1ef1c h\u00fat c\u1ee7a ch\u00fang trong nhi\u1ec1u th\u1eadp k\u1ef7. S\u1ef1 kh\u00e1c bi\u1ec7t l\u1edbn nh\u1ea5t gi\u1eefa \u201cth\u1eddi gian t\u1ed3n t\u1ea1i\u201d v\u00e0 \u201cth\u1eddi gian gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 m\u1ea1nh\u201d l\u00e0 c\u00e1ch b\u1ea1n ch\u0103m s\u00f3c ch\u00fang.<\/p>\n<h2>C\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tu\u1ed5i th\u1ecd c\u1ee7a nam ch\u00e2m Neodymium<\/h2>\n<p>M\u1ed9t s\u1ed1 y\u1ebfu t\u1ed1 c\u00f3 th\u1ec3 r\u00fat ng\u1eafn tu\u1ed5i th\u1ecd c\u1ee7a nam ch\u00e2m neodymium ho\u1eb7c l\u00e0m gi\u1ea3m \u0111\u1ed9 m\u1ea1nh c\u1ee7a ch\u00fang theo th\u1eddi gian. Bi\u1ebft \u0111i\u1ec1u g\u00ec g\u00e2y h\u1ea1i cho ch\u00fang \u2014 v\u00e0 c\u00e1ch tr\u00e1nh n\u00f3 \u2014 s\u1ebd gi\u00fap b\u1ea1n t\u1eadn d\u1ee5ng t\u1ed1i \u0111a ch\u00fang.<\/p>\n<h3>\u1ea2nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9<\/h3>\n<p>Nam ch\u00e2m neodymium nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec7t \u0111\u1ed9. H\u1ea7u h\u1ebft c\u00e1c lo\u1ea1i ti\u00eau chu\u1ea9n b\u1eaft \u0111\u1ea7u m\u1ea5t \u0111\u1ed9 m\u1ea1nh v\u0129nh vi\u1ec5n khi nhi\u1ec7t \u0111\u1ed9 v\u01b0\u1ee3t qu\u00e1 <strong>176\u00b0F (80\u00b0C)<\/strong>. C\u00e1c lo\u1ea1i ch\u1ecbu nhi\u1ec7t cao c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c l\u00ean \u0111\u1ebfn kho\u1ea3ng <strong>300\u00b0F (149\u00b0C)<\/strong>, nh\u01b0ng b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n \u0111\u00f3 c\u00f3 nguy c\u01a1 m\u1ea5t t\u1eeb t\u00ednh v\u0129nh vi\u1ec5n. Nhi\u1ec7t \u0111\u1ed9 l\u1ea1nh th\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u00e0 v\u1ea5n \u0111\u1ec1 tr\u1eeb khi c\u00f3 s\u1ef1 thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t g\u00e2y ra c\u0103ng th\u1eb3ng c\u01a1 h\u1ecdc.<\/p>\n<h3>\u1ea2nh h\u01b0\u1edfng c\u1ee7a \u0103n m\u00f2n v\u00e0 ti\u1ebfp x\u00fac \u0111\u1ed9 \u1ea9m<\/h3>\n<p>Nh\u1eefng nam ch\u00e2m n\u00e0y d\u1ec5 b\u1ecb r\u1ec9 s\u00e9t v\u00ec v\u1eadt li\u1ec7u n\u1ec1n c\u1ee7a ch\u00fang (NdFeB) d\u1ec5 b\u1ecb \u0103n m\u00f2n nhanh khi ti\u1ebfp x\u00fac v\u1edbi \u0111\u1ed9 \u1ea9m. Trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c c\u00f3 mu\u1ed1i, nam ch\u00e2m kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 ph\u00e2n h\u1ee7y nhanh ch\u00f3ng. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao ch\u00fang h\u1ea7u nh\u01b0 lu\u00f4n \u0111\u01b0\u1ee3c ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7\u2014c\u00e1c t\u00f9y ch\u1ecdn ph\u1ed5 bi\u1ebfn bao g\u1ed3m <strong>l\u1edbp m\u1ea1 nickel-copper-nickel<\/strong>, epoxy ho\u1eb7c nh\u1ef1a.<\/p>\n<h3>\u00c1p l\u1ef1c c\u01a1 h\u1ecdc<\/h3>\n<p>Nam ch\u00e2m neodymium m\u1ea1nh nh\u01b0ng d\u1ec5 v\u1ee1. M\u1ed9t c\u00fa va ch\u1ea1m s\u1eafc n\u00e9t, r\u01a1i ho\u1eb7c rung \u0111\u1ed9ng li\u00ean t\u1ee5c c\u00f3 th\u1ec3 l\u00e0m s\u1ee9t m\u1ebb, n\u1ee9t ho\u1eb7c th\u1eadm ch\u00ed l\u00e0m v\u1ee1 ch\u00fang. Khi b\u1ecb h\u01b0 h\u1ecfng, hi\u1ec7u su\u1ea5t c\u1ee7a ch\u00fang gi\u1ea3m, v\u00e0 c\u00e1c \u0111i\u1ec3m g\u00e3y r\u1ec9 s\u00e9t nhanh h\u01a1n.<\/p>\n<h3>Can thi\u1ec7p t\u1eeb tr\u01b0\u1eddng v\u00e0 s\u1eed d\u1ee5ng sai c\u00e1ch<\/h3>\n<p>\u0110\u1eb7t nam ch\u00e2m qu\u00e1 g\u1ea7n c\u00e1c tr\u01b0\u1eddng t\u1eeb \u0111\u1ed1i l\u1eadp kh\u00e1c ho\u1eb7c l\u01b0u tr\u1eef ch\u00fang theo c\u00e1ch g\u00e2y ra s\u1ef1 \u0111\u1ed1i l\u1eadp c\u00f3 th\u1ec3 l\u00e0m y\u1ebfu \u0111i theo th\u1eddi gian. D\u00f2ng \u0111i\u1ec7n m\u1ea1nh g\u1ea7n \u0111\u00f3 c\u0169ng c\u00f3 th\u1ec3 l\u00e0m thay \u0111\u1ed5i h\u01b0\u1edbng c\u1ee7a ch\u00fang v\u00e0 gi\u1ea3m s\u1ee9c m\u1ea1nh.<\/p>\n<h3>Ch\u1ea5t l\u01b0\u1ee3ng l\u1edbp ph\u1ee7 v\u00e0 m\u1ea1<\/h3>\n<p>Lo\u1ea1i v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng l\u1edbp ph\u1ee7 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n. L\u1edbp ph\u1ee7 nickel ho\u1eb7c nickel-copper-nickel ho\u1ea1t \u0111\u1ed9ng t\u1ed1t cho s\u1eed d\u1ee5ng chung, trong khi l\u1edbp epoxy ho\u1eb7c Teflon ph\u00f9 h\u1ee3p h\u01a1n trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c c\u00f3 h\u00f3a ch\u1ea5t kh\u1eafc nghi\u1ec7t. M\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 ch\u1ea5t l\u01b0\u1ee3ng cao c\u00f3 th\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng c\u1ee7a nam ch\u00e2m nhi\u1ec1u n\u0103m.<\/p>\n<h2>D\u1ea5u hi\u1ec7u cho th\u1ea5y nam ch\u00e2m Neodymium c\u1ee7a b\u1ea1n \u0111ang m\u00f2n<\/h2>\n<p>N\u1ebfu b\u1ea1n th\u01b0\u1eddng xuy\u00ean s\u1eed d\u1ee5ng nam ch\u00e2m neodymium, \u0111\u00e1ng \u0111\u1ec3 bi\u1ebft c\u00e1c d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o ch\u00fang b\u1eaft \u0111\u1ea7u m\u1ea5t \u0111i kh\u1ea3 n\u0103ng t\u1eeb t\u00ednh. Ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c v\u1ea5n \u0111\u1ec1 c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n tr\u00e1nh c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 hi\u1ec7u su\u1ea5t ho\u1eb7c th\u1eadm ch\u00ed ph\u1ea3i thay th\u1ebf ch\u00fang qu\u00e1 s\u1edbm.<\/p>\n<p><strong>C\u00e1c d\u1ea5u hi\u1ec7u ph\u1ed5 bi\u1ebfn c\u1ea7n ch\u00fa \u00fd:<\/strong><\/p>\n<ul>\n<li><strong>S\u1ee9c h\u00fat y\u1ebfu h\u01a1n<\/strong> \u2013 N\u1ebfu nam ch\u00e2m kh\u00f4ng gi\u1eef ch\u1eb7t c\u00e1c v\u1eadt nh\u01b0 tr\u01b0\u1edbc n\u1eefa, \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng c\u1ee7a s\u1ef1 suy gi\u1ea3m s\u1ee9c m\u1ea1nh t\u1eeb t\u00ednh.<\/li>\n<li><strong>R\u1ec9 s\u00e9t ho\u1eb7c h\u01b0 h\u1ecfng l\u1edbp ph\u1ee7 r\u00f5 r\u00e0ng<\/strong> \u2013 Ngay c\u1ea3 khi c\u00f3 l\u1edbp ph\u1ee7 nickel, epoxy ho\u1eb7c l\u1edbp b\u1ea3o v\u1ec7 kh\u00e1c, v\u1ebft tr\u1ea7y x\u01b0\u1edbc ho\u1eb7c s\u1ee9t m\u1ebb l\u00e0m l\u1ed9 l\u00f5i kim lo\u1ea1i c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn r\u1ec9 s\u00e9t v\u00e0 ph\u00e2n h\u1ee7y nhanh h\u01a1n.<\/li>\n<li><strong>Gi\u1ea3m hi\u1ec7u su\u1ea5t li\u00ean quan \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9<\/strong> \u2013 Nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c l\u1ea1nh c\u1ef1c \u0111oan c\u00f3 th\u1ec3 t\u1ea1m th\u1eddi ho\u1eb7c v\u0129nh vi\u1ec5n l\u00e0m gi\u1ea3m s\u1ee9c m\u1ea1nh t\u1eeb t\u00ednh, \u0111\u1eb7c bi\u1ec7t n\u1ebfu nam ch\u00e2m ti\u1ebfp x\u00fac ngo\u00e0i ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec1 ngh\u1ecb.<\/li>\n<li><strong>N\u1ee9t ho\u1eb7c h\u01b0 h\u1ecfng c\u1ea5u tr\u00fac<\/strong> \u2013 V\u00ec nam ch\u00e2m neodymium d\u1ec5 v\u1ee1, b\u1ea5t k\u1ef3 v\u1ebft s\u1ee9t m\u1ebb, n\u1ee9t ho\u1eb7c v\u1ee1 n\u00e0o c\u0169ng c\u00f3 th\u1ec3 g\u00e2y m\u1ea5t hi\u1ec7u su\u1ea5t v\u00e0 t\u0103ng nguy c\u01a1 m\u1ea5t t\u1eeb t\u00ednh.<\/li>\n<\/ul>\n<p>Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 c\u00e1c d\u1ea5u hi\u1ec7u n\u00e0y c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n ch\u1ee7 \u0111\u1ed9ng trong vi\u1ec7c b\u1ea3o tr\u00ec, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi hi\u1ec7u su\u1ea5t nam ch\u00e2m m\u1ea1nh m\u1ebd, \u1ed5n \u0111\u1ecbnh.<\/p>\n<h2>C\u00e1ch b\u1ea3o tr\u00ec \u0111\u00fang c\u00e1ch nam ch\u00e2m Neodymium \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a ch\u00fang<\/h2>\n<p>Nam ch\u00e2m neodymium c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i h\u00e0ng th\u1eadp k\u1ef7 n\u1ebfu b\u1ea1n ch\u0103m s\u00f3c \u0111\u00fang c\u00e1ch. M\u1ed9t ch\u00fat c\u1ea9n th\u1eadn s\u1ebd gi\u00fap duy tr\u00ec s\u1ee9c m\u1ea1nh t\u1eeb t\u00ednh v\u00e0 ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng \u0111i\u1ec1u hi\u1ec7u qu\u1ea3 nh\u1ea5t:<\/p>\n<h3>Th\u1ef1c h\u00e0nh l\u01b0u tr\u1eef t\u1ed1t nh\u1ea5t<\/h3>\n<ul>\n<li><strong>Gi\u1eef ch\u00fang kh\u00f4 r\u00e1o<\/strong> \u2013 \u0110\u1ed9 \u1ea9m l\u00e0 k\u1ebb th\u00f9 l\u1edbn nh\u1ea5t, v\u00ec v\u1eady h\u00e3y l\u01b0u tr\u1eef \u1edf n\u01a1i c\u00f3 \u0111\u1ed9 \u1ea9m th\u1ea5p.<\/li>\n<li><strong>S\u1eed d\u1ee5ng spacers ho\u1eb7c keeper<\/strong> \u2013 Nh\u1eefng c\u00e1i n\u00e0y ng\u0103n ch\u1eb7n nam ch\u00e2m va v\u00e0o nhau v\u00e0 b\u1ecb s\u1ee9t m\u1ebb.<\/li>\n<li><strong>Tr\u00e1nh nhi\u1ec5u t\u1eeb t\u1eeb nam ch\u00e2m<\/strong> \u2013 L\u01b0u tr\u1eef xa c\u00e1c tr\u01b0\u1eddng t\u1eeb m\u1ea1nh \u0111\u1ed1i l\u1eadp.<\/li>\n<\/ul>\n<h3>M\u1eb9o ki\u1ec3m tra v\u00e0 l\u00e0m s\u1ea1ch<\/h3>\n<ul>\n<li><strong>Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3<\/strong> \u2013 T\u00ecm ki\u1ebfm c\u00e1c v\u1ebft n\u1ee9t, s\u1ee9t m\u1ebb ho\u1eb7c m\u00f2n l\u1edbp ph\u1ee7.<\/li>\n<li><strong>Lau nh\u1eb9 nh\u00e0ng<\/strong> \u2013 S\u1eed d\u1ee5ng kh\u0103n m\u1ec1m, kh\u00f4; tr\u00e1nh n\u01b0\u1edbc tr\u1eeb khi l\u1edbp ph\u1ee7 c\u00f2n nguy\u00ean v\u1eb9n.<\/li>\n<li><strong>Kh\u00f4ng d\u00f9ng ch\u1ea5t t\u1ea9y r\u1eeda m\u00e0i m\u00f2n<\/strong> \u2013 Ch\u00fang c\u00f3 th\u1ec3 l\u00e0m tr\u1ea7y l\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 v\u00e0 th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh \u0103n m\u00f2n.<\/li>\n<\/ul>\n<h3>L\u1edbp ph\u1ee7 b\u1ea3o v\u1ec7 cho m\u00f4i tr\u01b0\u1eddng \u0103n m\u00f2n<\/h3>\n<ul>\n<li><strong>L\u1edbp ph\u1ee7 nickel-copper-nickel<\/strong> th\u01b0\u1eddng d\u00f9ng v\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong nh\u00e0.<\/li>\n<li>\u0110\u1ed1i v\u1edbi m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c bi\u1ec3n, <strong>l\u1edbp ph\u1ee7 epoxy, nh\u1ef1a ho\u1eb7c cao su<\/strong> ch\u1ecbu \u0111\u1ef1ng t\u1ed1t h\u01a1n.<\/li>\n<li>N\u1ebfu nam ch\u00e2m s\u1ebd \u0111\u01b0\u1ee3c nh\u00fang trong thi\u1ebft b\u1ecb, h\u00e3y xem x\u00e9t ni\u00eam phong ch\u00fang trong <strong>v\u1ecf k\u00edn kh\u00ed<\/strong>.<\/li>\n<\/ul>\n<h3>Tr\u00e1nh c\u0103ng th\u1eb3ng c\u01a1 h\u1ecdc ho\u1eb7c nhi\u1ec7t<\/h3>\n<ul>\n<li><strong>\u0110\u1eebng l\u00e0m r\u01a1i ch\u00fang<\/strong> \u2013 Nam ch\u00e2m neodymium d\u1ec5 v\u1ee1 v\u00e0 c\u00f3 th\u1ec3 v\u1ee1 v\u1ee5n khi va \u0111\u1eadp.<\/li>\n<li><strong>Ch\u00fa \u00fd \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9<\/strong> \u2013 Gi\u1eef nhi\u1ec7t d\u01b0\u1edbi 176\u00b0F (80\u00b0C) tr\u1eeb khi b\u1ea1n s\u1eed d\u1ee5ng c\u00e1c lo\u1ea1i c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t cao.<\/li>\n<li><strong>H\u1ea1n ch\u1ebf t\u00e1c \u0111\u1ed9ng l\u1eb7p \u0111i l\u1eb7p l\u1ea1i<\/strong> \u2013 Rung \u0111\u1ed9ng ho\u1eb7c s\u1ed1c li\u00ean t\u1ee5c c\u00f3 th\u1ec3 l\u00e0m y\u1ebfu ho\u1eb7c l\u00e0m v\u1ee1 nam ch\u00e2m.<\/li>\n<\/ul>\n<p>Gi\u1eef cho ch\u00fang s\u1ea1ch s\u1ebd, ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7, kh\u00f4 r\u00e1o v\u00e0 tr\u00e1nh kh\u1ecfi \u0111i\u1ec1u ki\u1ec7n c\u1ef1c \u0111oan l\u00e0 c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd c\u1ee7a nam ch\u00e2m neodymium.<\/p>\n<h2>So s\u00e1nh v\u1edbi c\u00e1c lo\u1ea1i nam ch\u00e2m kh\u00e1c v\u1ec1 tu\u1ed5i th\u1ecd<\/h2>\n<p>Khi n\u00f3i \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n c\u1ee7a nam ch\u00e2m, c\u00e1c lo\u1ea1i kh\u00e1c nhau ho\u1ea1t \u0111\u1ed9ng r\u1ea5t kh\u00e1c nhau. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t ph\u00e2n t\u00edch nhanh v\u1ec1 c\u00e1ch <strong>nam ch\u00e2m neodymium<\/strong> so s\u00e1nh v\u1edbi c\u00e1c l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn kh\u00e1c v\u1ec1 <strong>tu\u1ed5i th\u1ecd, s\u1ee9c m\u1ea1nh v\u00e0 \u0111\u1ed9 b\u1ec1n<\/strong>.<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i nam ch\u00e2m<\/th>\n<th>Tu\u1ed5i th\u1ecd \u0111i\u1ec3n h\u00ecnh (\u0111i\u1ec1u ki\u1ec7n t\u1ed1i \u01b0u)<\/th>\n<th>M\u1ee9c \u0111\u1ed9 c\u01b0\u1eddng l\u1ef1c<\/th>\n<th>Kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t<\/th>\n<th>Ch\u1ed1ng \u0103n m\u00f2n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Neodymium (NdFeB)<\/strong><\/td>\n<td>H\u01a1n 20 n\u0103m<\/td>\n<td>R\u1ea5t cao<\/td>\n<td>V\u1eeba ph\u1ea3i (\u0111\u1ebfn kho\u1ea3ng 176\u00b0F)<\/td>\n<td>Th\u1ea5p (c\u1ea7n ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7)<\/td>\n<\/tr>\n<tr>\n<td><strong>Ferrite (G\u1ed1m)<\/strong><\/td>\n<td>H\u01a1n 50 n\u0103m<\/td>\n<td>Th\u1ea5p \u0111\u1ebfn trung b\u00ecnh<\/td>\n<td>Cao (\u0111\u1ebfn kho\u1ea3ng 482\u00b0F)<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<tr>\n<td><strong>Alnico<\/strong><\/td>\n<td>H\u01a1n 50 n\u0103m<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>R\u1ea5t cao (\u0111\u1ebfn kho\u1ea3ng 1000\u00b0F)<\/td>\n<td>T\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td><strong>Cobalt Samari (SmCo)<\/strong><\/td>\n<td>20\u201330 n\u0103m<\/td>\n<td>Cao<\/td>\n<td>R\u1ea5t cao (\u0111\u1ebfn kho\u1ea3ng 572\u00b0F)<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Neodymium so v\u1edbi Ferrite<\/h3>\n<ul>\n<li>Ferrite k\u00e9o d\u00e0i h\u01a1n v\u1ec1 s\u1ed1 n\u0103m nh\u01b0ng y\u1ebfu h\u01a1n nhi\u1ec1u v\u1ec1 l\u1ef1c h\u00fat t\u1eeb tr\u01b0\u1eddng.<\/li>\n<li>Ferrite ch\u1ecbu nhi\u1ec7t v\u00e0 th\u1eddi ti\u1ebft t\u1ed1t h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n l\u1edbp ph\u1ee7.<\/li>\n<li>Neodymium cung c\u1ea5p l\u1ef1c h\u00fat g\u1ea5p 7\u201310 l\u1ea7n trong k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n nhi\u1ec1u.<\/li>\n<\/ul>\n<h3>Neodymium so v\u1edbi Alnico<\/h3>\n<ul>\n<li>Alnico ch\u1ecbu nhi\u1ec7t c\u1ef1c k\u1ef3 t\u1ed1t nh\u01b0ng d\u1ec5 m\u1ea5t t\u1eeb t\u00ednh h\u01a1n n\u1ebfu b\u1ecb va \u0111\u1eadp ho\u1eb7c ti\u1ebfp x\u00fac v\u1edbi c\u00e1c tr\u01b0\u1eddng nh\u1ea5t \u0111\u1ecbnh.<\/li>\n<li>Neodymium gi\u1eef v\u1eefng s\u1ee9c m\u1ea1nh t\u1ed1t h\u01a1n nhi\u1ec1u trong x\u1eed l\u00fd b\u00ecnh th\u01b0\u1eddng nh\u01b0ng kh\u00f4ng th\u1ec3 ch\u1ecbu nhi\u1ec7t c\u1ef1c cao nh\u01b0 Alnico.<\/li>\n<\/ul>\n<h3>Neodymium so v\u1edbi Samarium Cobalt<\/h3>\n<ul>\n<li>Samarium Cobalt ch\u1ed1ng nhi\u1ec7t v\u00e0 \u0103n m\u00f2n t\u1ed1t h\u01a1n nh\u01b0ng gi\u00e1 th\u00e0nh cao h\u01a1n \u0111\u00e1ng k\u1ec3.<\/li>\n<li>\u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 ti\u00eau d\u00f9ng, <strong>nam ch\u00e2m neodymium \u0111\u01b0\u1ee3c ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7<\/strong> mang l\u1ea1i t\u1ef7 l\u1ec7 \u0111\u1ed9 b\u1ec1n tr\u00ean gi\u00e1 th\u00e0nh t\u1ed1t h\u01a1n trong khi v\u1eabn b\u1ec1n b\u1ec9 h\u00e0ng th\u1eadp k\u1ef7 n\u1ebfu \u0111\u01b0\u1ee3c ch\u0103m s\u00f3c \u0111\u00fang c\u00e1ch.<\/li>\n<\/ul>\n<p>V\u1edbi <strong>l\u1edbp ph\u1ee7<\/strong> ph\u00f9 h\u1ee3p <strong>v\u00e0 \u0111\u01b0\u1ee3c gi\u1eef trong gi\u1edbi h\u1ea1n<\/strong>nhi\u1ec7t \u0111\u1ed9 an to\u00e0n <strong>, nam ch\u00e2m neodymium mang \u0111\u1ebfn s\u1ef1 c\u00e2n b\u1eb1ng t\u1ed1t nh\u1ea5t v\u1ec1<\/strong> \u0111\u1ed9 m\u1ea1nh, hi\u1ec7u qu\u1ea3 k\u00edch th\u01b0\u1edbc v\u00e0 tu\u1ed5i th\u1ecd<\/p>\n<h2>Cam k\u1ebft v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 b\u1ec1n c\u1ee7a NBAEM<\/h2>\n<p>m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c cho c\u1ea3 s\u1eed d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 h\u00e0ng ng\u00e0y.<\/p>\n<p>T\u1ea1i NBAEM, ch\u00fang t\u00f4i ch\u1ebf t\u1ea1o nam ch\u00e2m neodymium \u0111\u1ec3 c\u00f3 tu\u1ed5i th\u1ecd cao, s\u1eed d\u1ee5ng c\u00e1c ti\u00eau chu\u1ea9n s\u1ea3n xu\u1ea5t nghi\u00eam ng\u1eb7t gi\u00fap duy tr\u00ec \u0111\u1ed9 b\u1ec1n t\u1eeb t\u00ednh v\u00e0 \u0111\u1ed9 b\u1ec1n cao theo th\u1eddi gian. M\u1ed7i nam ch\u00e2m \u0111\u1ec1u tr\u1ea3i qua c\u00e1c ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng ch\u00ednh x\u00e1c \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o n\u00f3 c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf, cho d\u00f9 \u0111\u00f3 l\u00e0 cho m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p, thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, d\u1ee5ng c\u1ee5 y t\u1ebf hay c\u00e1c s\u1ea3n ph\u1ea9m h\u00e0ng ng\u00e0y. <strong>t\u00f9y ch\u1ecdn t\u00f9y ch\u1ec9nh<\/strong> Ch\u00fang t\u00f4i c\u0169ng cung c\u1ea5p <strong>l\u1edbp ph\u1ee7<\/strong> \u0111\u1ec3 nam ch\u00e2m c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c nhu c\u1ea7u c\u1ee5 th\u1ec3. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m c\u00e1c <strong>l\u1edbp ph\u1ee7<\/strong> kh\u00e1c nhau nh\u01b0 niken-\u0111\u1ed3ng-niken, epoxy ho\u1eb7c v\u00e0ng \u0111\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n t\u1ed1t h\u01a1n v\u00e0 v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cho<\/p>\n<p>kh\u1ea3 n\u0103ng ch\u1ecbu nhi\u1ec7t \u0111\u1ed9 cao h\u01a1n <strong>\u0111\u1ec3 ch\u00fang c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c trong m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t.<\/strong>Kh\u00e1ch h\u00e0ng c\u1ee7a ch\u00fang t\u00f4i t\u1ea1i Vi\u1ec7t Nam \u0111\u00e3 chia s\u1ebb nh\u1eefng c\u00e2u chuy\u1ec7n th\u00e0nh c\u00f4ng v\u1ec1 vi\u1ec7c nam ch\u00e2m v\u1eabn ho\u1ea1t \u0111\u1ed9ng v\u1edbi \u0111\u1ea7y \u0111\u1ee7 s\u1ee9c m\u1ea1nh ngay c\u1ea3 sau nhi\u1ec1u n\u0103m s\u1eed d\u1ee5ng nhi\u1ec1u trong m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi, h\u00e0ng h\u1ea3i v\u00e0 s\u1ea3n xu\u1ea5t. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao ch\u00fang t\u00f4i h\u1ed7 tr\u1ee3 c\u00e1c s\u1ea3n ph\u1ea9m c\u1ee7a m\u00ecnh b\u1eb1ng<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>Nam ch\u00e2m neodymium c\u00f3 th\u1ec3 m\u1ea5t ho\u00e0n to\u00e0n t\u1eeb t\u00ednh kh\u00f4ng<\/h3>\n<p>d\u1ecbch v\u1ee5 h\u1ed7 tr\u1ee3 v\u00e0 b\u1ea3o h\u00e0nh \u0111\u00e1ng tin c\u1eady<\/p>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng l\u00e0m t\u0103ng t\u1ed1c qu\u00e1 tr\u00ecnh l\u00e3o h\u00f3a nh\u01b0 th\u1ebf n\u00e0o<\/h3>\n<p>\u0110\u1ed9 \u1ea9m cao, n\u01b0\u1edbc mu\u1ed1i ho\u1eb7c ti\u1ebfp x\u00fac ngo\u00e0i tr\u1eddi l\u00e2u d\u00e0i c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn \u0103n m\u00f2n, \u0111\u1eb7c bi\u1ec7t n\u1ebfu l\u1edbp ph\u1ee7 b\u1ecb h\u1ecfng. Khi qu\u00e1 tr\u00ecnh \u0103n m\u00f2n b\u1eaft \u0111\u1ea7u b\u00ean trong nam ch\u00e2m, n\u00f3 c\u00f3 th\u1ec3 nhanh ch\u00f3ng l\u00e0m y\u1ebfu c\u1ea5u tr\u00fac v\u00e0 gi\u1ea3m s\u1ee9c m\u1ea1nh.<\/p>\n<h3>D\u1ea3i nhi\u1ec7t \u0111\u1ed9 l\u00fd t\u01b0\u1edfng \u0111\u1ec3 l\u01b0u tr\u1eef<\/h3>\n<p>L\u01b0u tr\u1eef ch\u00fang \u1edf n\u01a1i m\u00e1t m\u1ebb, kh\u00f4 r\u00e1o trong kho\u1ea3ng <strong>50\u00b0F v\u00e0 80\u00b0F<\/strong>. Tr\u00e1nh \u0111\u1ec3 ch\u00fang trong \u00f4 t\u00f4 n\u00f3ng, g\u1ea7n l\u00f2 n\u01b0\u1edbng ho\u1eb7c b\u1ea5t c\u1ee9 n\u01a1i n\u00e0o c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 nhi\u1ec7t \u0111\u1ed9 \u0111\u1ecbnh m\u1ee9c c\u1ee7a ch\u00fang (th\u01b0\u1eddng kho\u1ea3ng 176\u00b0F \u0111\u1ed1i v\u1edbi c\u00e1c lo\u1ea1i ti\u00eau chu\u1ea9n).<\/p>\n<h3>Nam ch\u00e2m ph\u1ee7 c\u00f3 \u0111\u1ed9 b\u1ec1n cao h\u01a1n kh\u00f4ng<\/h3>\n<p>C\u00f3. L\u1edbp ph\u1ee7 nickel, epoxy ho\u1eb7c nh\u1ef1a b\u1ea3o v\u1ec7 ch\u1ed1ng r\u1ec9 s\u00e9t v\u00e0 thi\u1ec7t h\u1ea1i do \u0111\u1ed9 \u1ea9m. \u0110\u1ed1i v\u1edbi s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng bi\u1ec3n ho\u1eb7c ngo\u00e0i tr\u1eddi, l\u1edbp ph\u1ee7 ba l\u1edbp nickel-kim lo\u1ea1i \u0111\u1ed3ng-nickel ho\u1eb7c epoxy ho\u1ea1t \u0111\u1ed9ng t\u1ed1t nh\u1ea5t.<\/p>\n<h3><\/h3>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u th\u1eddi gian nam ch\u00e2m neodymium t\u1ed3n t\u1ea1i, c\u00e1c y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tu\u1ed5i th\u1ecd v\u00e0 m\u1eb9o duy tr\u00ec s\u1ee9c m\u1ea1nh c\u1ee7a ch\u00fang tr\u00ean 10 n\u0103m<\/p>","protected":false},"author":1,"featured_media":1945,"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-2057","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\/solid_round_magnets_features_and_uses_taP6T6fR9.webp","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2057","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=2057"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2057\/revisions"}],"predecessor-version":[{"id":2061,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/2057\/revisions\/2061"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/1945"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=2057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=2057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=2057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}