{"id":1434,"date":"2024-12-16T08:41:13","date_gmt":"2024-12-16T08:41:13","guid":{"rendered":"https:\/\/nbaem.com\/?p=1434"},"modified":"2025-09-17T07:33:56","modified_gmt":"2025-09-17T07:33:56","slug":"ceramic-magnets","status":"publish","type":"post","link":"https:\/\/nbaem.com\/vi\/ceramic-magnets\/","title":{"rendered":"Nam ch\u00e2m Ceramic l\u00e0 g\u00ec"},"content":{"rendered":"

Nam ch\u00e2m g\u1ed1m<\/span><\/a>, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nam ch\u00e2m ferit, \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0o nh\u1eefng n\u0103m 1960 nh\u01b0 m\u1ed9t gi\u1ea3i ph\u00e1p thay th\u1ebf chi ph\u00ed th\u1ea5p cho nam ch\u00e2m kim lo\u1ea1i. Ch\u00fang ch\u1ee7 y\u1ebfu bao g\u1ed3m oxit s\u1eaft v\u00e0 stronti cacbonat. Nam ch\u00e2m g\u1ed1m c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng kh\u1eed t\u1eeb cao. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u00ec gi\u00e1 th\u00e0nh m\u1ed7i pound r\u1ebb v\u00e0 gi\u1eef \u0111\u01b0\u1ee3c t\u1eeb t\u00ednh trong m\u00f4i tr\u01b0\u1eddng \u0111\u1ea7y th\u00e1ch th\u1ee9c. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd xem x\u00e9t nam ch\u00e2m g\u1ed1m, c\u00e1c lo\u1ea1i kh\u00e1c nhau, c\u00e1ch ch\u00fang \u0111\u01b0\u1ee3c t\u1ea1o ra v\u00e0 c\u00e1ch ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00f4ng ngh\u1ec7 ng\u00e0y nay.<\/p>\n

Nam ch\u00e2m g\u1ed1m l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n

Nam ch\u00e2m g\u1ed1m, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nam ch\u00e2m ferit, l\u00e0 nam ch\u00e2m v\u0129nh c\u1eedu c\u1ee9ng v\u00e0 gi\u00f2n \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng c\u00e1ch tr\u1ed9n oxit s\u1eaft v\u1edbi bari ho\u1eb7c stronti cacbonat. Ch\u00fang ph\u1ed5 bi\u1ebfn v\u00ec gi\u00e1 th\u00e0nh r\u1ebb v\u00e0 ch\u1ed1ng \u0103n m\u00f2n v\u00e0 kh\u1eed t\u1eeb. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng nam ch\u00e2m g\u1ed1m trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p kh\u00e1c nhau nh\u01b0 \u0111\u1ed9ng c\u01a1 DC, b\u1ed9 t\u00e1ch t\u1eeb v\u00e0 c\u1ea3m bi\u1ebfn \u00f4 t\u00f4. X\u00e9t theo tr\u1ecdng l\u01b0\u1ee3ng, nam ch\u00e2m ferit chi\u1ebfm h\u01a1n 75% l\u01b0\u1ee3ng nam ch\u00e2m ti\u00eau th\u1ee5 tr\u00ean th\u1ebf gi\u1edbi.<\/p>\n

S\u1ea3n xu\u1ea5t nam ch\u00e2m g\u1ed1m<\/strong><\/span><\/h2>\n

Nam ch\u00e2m g\u1ed1m \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng k\u1ef9 thu\u1eadt c\u00f4ng ngh\u1ec7 b\u1ed9t. B\u1ea1n tr\u1ed9n c\u00e1c nguy\u00ean li\u1ec7u th\u00f4, th\u01b0\u1eddng l\u00e0 oxit s\u1eaft v\u00e0 stronti cacbonat, sau \u0111\u00f3 nung n\u00f3ng ch\u00fang \u0111\u1ebfn kho\u1ea3ng 1800-2000\u00b0F. Qu\u00e1 tr\u00ecnh n\u00e0y g\u00e2y ra ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc t\u1ea1o ra v\u1eadt li\u1ec7u ferit. Ferit sau \u0111\u00f3 \u0111\u01b0\u1ee3c gi\u1ea3m th\u00e0nh m\u1ed9t lo\u1ea1i b\u1ed9t m\u1ecbn b\u1eb1ng c\u00e1ch nghi\u1ec1n \u01b0\u1edbt. B\u1ed9t \u0111\u01b0\u1ee3c s\u1ea5y kh\u00f4 \u0111\u1ec3 \u00e9p kh\u00f4 ho\u1eb7c \u0111\u01b0\u1ee3c b\u01a1m d\u01b0\u1edbi d\u1ea1ng h\u1ed7n h\u1ee3p s\u1ec7t \u01b0\u1edbt v\u00e0o khu\u00f4n \u0111\u1ec3 t\u1ea1o h\u00ecnh.<\/p>\n

Trong \u00e9p \u01b0\u1edbt, b\u1ea1n n\u00e9n h\u1ed7n h\u1ee3p s\u1ec7t trong khu\u00f4n, th\u01b0\u1eddng c\u00f3 t\u1eeb tr\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng. \u0110i\u1ec1u n\u00e0y l\u00e0m cho c\u00e1c h\u1ea1t ferit th\u1eb3ng h\u00e0ng, v\u00ec v\u1eady nam ch\u00e2m c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh t\u1eeb t\u00ednh m\u00e0 b\u1ea1n mu\u1ed1n. B\u01b0\u1edbc cu\u1ed1i c\u00f9ng l\u00e0 thi\u00eau k\u1ebft v\u1eadt li\u1ec7u \u1edf kho\u1ea3ng 2000\u00b0F. Qu\u00e1 tr\u00ecnh n\u00e0y lo\u1ea1i b\u1ecf b\u1ea5t k\u1ef3 n\u01b0\u1edbc c\u00f2n l\u1ea1i n\u00e0o v\u00e0 t\u1ea1o th\u00e0nh m\u1ed9t nam ch\u00e2m \u0111\u1eb7c, r\u1eafn. Nam ch\u00e2m gi\u00f2n sau \u0111\u00f3 \u0111\u01b0\u1ee3c m\u00e0i theo k\u00edch th\u01b0\u1edbc b\u1eb1ng b\u00e1nh xe kim c\u01b0\u01a1ng v\u00ec n\u00f3 r\u1ea5t c\u1ee9ng n\u00ean c\u00e1c d\u1ee5ng c\u1ee5 th\u00f4ng th\u01b0\u1eddng kh\u00f4ng th\u1ec3 t\u1ea1o h\u00ecnh \u0111\u01b0\u1ee3c.<\/p>\n

 <\/p>\n

C\u00e1c lo\u1ea1i nam ch\u00e2m g\u1ed1m<\/strong><\/span><\/h2>\n

C\u00f3 nhi\u1ec1u lo\u1ea1i nam ch\u00e2m g\u1ed1m kh\u00e1c nhau d\u1ef1a tr\u00ean \u0111\u1eb7c t\u00ednh t\u1eeb t\u00ednh v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang.<\/p>\n

 <\/p>\n

    \n
  1. Nam ch\u00e2m v\u0129nh c\u1eedu Ferit<\/strong><\/li>\n<\/ol>\n

    \u0110\u00e2y l\u00e0 nh\u1eefng nam ch\u00e2m g\u1ed1m m\u00e0u \u0111en \u0111i\u1ec3n h\u00ecnh m\u00e0 b\u1ea1n th\u01b0\u1eddng th\u1ea5y. Ch\u00fang \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb oxit s\u1eaft v\u00e0 stronti cacbonat ho\u1eb7c bari cacbonat. Nam ch\u00e2m g\u1ed1m v\u0129nh c\u1eedu gi\u1eef l\u1ea1i t\u1eeb tr\u01b0\u1eddng m\u1ea1nh sau khi b\u1ea1n t\u1eeb h\u00f3a ch\u00fang. B\u1ea1n s\u1ebd t\u00ecm th\u1ea5y nh\u1eefng nam ch\u00e2m n\u00e0y trong \u0111\u1ed9ng c\u01a1, loa v\u00e0 m\u00e1y ph\u00e1t \u0111i\u1ec7n.<\/p>\n

      \n
    1. V\u1eadt li\u1ec7u t\u1eeb m\u1ec1m<\/strong><\/li>\n<\/ol>\n

      Nam ch\u00e2m g\u1ed1m t\u1eeb m\u1ec1m \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a oxit s\u1eaft v\u00e0 c\u00e1c oxit kim lo\u1ea1i kh\u00e1c nh\u01b0 niken ho\u1eb7c k\u1ebdm. Nh\u1eefng nam ch\u00e2m n\u00e0y kh\u00f4ng ph\u1ea3i l\u00e0 v\u0129nh c\u1eedu. Ch\u00fang kh\u00f4ng gi\u1eef l\u1ea1i t\u1eeb tr\u01b0\u1eddng sau khi b\u1ea1n lo\u1ea1i b\u1ecf l\u1ef1c t\u1eeb h\u00f3a b\u00ean ngo\u00e0i. B\u1ea1n s\u1eed d\u1ee5ng nh\u1eefng nam ch\u00e2m n\u00e0y trong l\u00f5i m\u00e1y bi\u1ebfn \u00e1p, cu\u1ed9n c\u1ea3m v\u00e0 cu\u1ed9n c\u1ea3m.<\/p>\n

        \n
      1. V\u1eadt li\u1ec7u t\u1eeb quay h\u1ed3i chuy\u1ec3n<\/strong><\/li>\n<\/ol>\n

        Nam ch\u00e2m g\u1ed1m t\u1eeb quay h\u1ed3i chuy\u1ec3n c\u00f3 c\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u1eb7c bi\u1ec7t khi b\u1ea1n cho ch\u00fang ti\u1ebfp x\u00fac v\u1edbi t\u1eeb tr\u01b0\u1eddng DC vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t ph\u1eb3ng c\u1ee7a v\u1eadt li\u1ec7u ho\u1eb7c tr\u01b0\u1eddng s\u00f3ng \u0111i\u1ec7n t\u1eeb. B\u1ea1n s\u1eed d\u1ee5ng nh\u1eefng nam ch\u00e2m n\u00e0y trong c\u00e1c h\u1ec7 th\u1ed1ng li\u00ean l\u1ea1c vi s\u00f3ng \u0111\u1ec3 ki\u1ec3m so\u00e1t s\u1ef1 ph\u00e2n c\u1ef1c c\u1ee7a s\u00f3ng \u0111i\u1ec7n t\u1eeb khi ch\u00fang \u0111i qua.<\/p>\n

          \n
        1. V\u1eadt li\u1ec7u t\u1eeb kho\u1ea3nh kh\u1eafc<\/strong><\/li>\n<\/ol>\n

          V\u1eadt li\u1ec7u t\u1eeb kho\u1ea3nh kh\u1eafc l\u00e0 v\u1eadt li\u1ec7u ferit, nh\u01b0 magi\u00ea mangan ferit. Nh\u1eefng v\u1eadt li\u1ec7u n\u00e0y c\u00f3 m\u1ed9t v\u00f2ng l\u1eb7p t\u1eeb tr\u1ec5 h\u00ecnh ch\u1eef nh\u1eadt. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 ch\u00fang c\u00f3 th\u1ec3 gi\u1eef l\u1ea1i t\u1eeb h\u00f3a m\u00e0 ch\u00fang \u0111\u1ea1t \u0111\u01b0\u1ee3c d\u01b0\u1edbi m\u1ed9t t\u1eeb tr\u01b0\u1eddng ngo\u00e0i nh\u1ecf. B\u1ea1n s\u1eed d\u1ee5ng nh\u1eefng nam ch\u00e2m n\u00e0y trong c\u00e1c b\u1ed9 ph\u1eadn b\u1ed9 nh\u1edb cho m\u00e1y t\u00ednh v\u00e0 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00e1c.<\/p>\n

            \n
          1. V\u1eadt li\u1ec7u t\u1eeb \u00e1p<\/strong><\/li>\n<\/ol>\n

            V\u1eadt li\u1ec7u t\u1eeb \u00e1p c\u00f3 m\u1ed9t \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 bi\u1ebfn t\u1eeb. Khi b\u1ea1n t\u1eeb h\u00f3a c\u00e1c v\u1eadt li\u1ec7u n\u00e0y, ch\u00fang s\u1ebd thay \u0111\u1ed5i h\u00ecnh d\u1ea1ng. B\u1ea1n s\u1eed d\u1ee5ng v\u1eadt li\u1ec7u t\u1eeb \u00e1p trong c\u00e1c \u0111\u1ea7u d\u00f2 chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n t\u1eeb th\u00e0nh n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc. B\u1ea1n s\u1ebd t\u00ecm th\u1ea5y nh\u1eefng v\u1eadt li\u1ec7u n\u00e0y trong thi\u1ebft b\u1ecb sonar v\u00e0 si\u00eau \u00e2m.<\/p>\n

             <\/p>\n

            \u1ee8ng d\u1ee5ng c\u1ee7a nam ch\u00e2m g\u1ed1m<\/strong><\/span><\/h2>\n

            Nam ch\u00e2m g\u1ed1m s\u1ee9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 th\u01b0\u01a1ng m\u1ea1i kh\u00e1c nhau. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 v\u00ed d\u1ee5:<\/p>\n

            Thi\u1ebft b\u1ecb \u0110i\u1ec7n \u00c2m Thanh: Loa, micro, tai nghe, v.v.<\/p>\n

            \u0110\u1ed9ng c\u01a1 v\u00e0 M\u00e1y ph\u00e1t \u0111i\u1ec7n: B\u1ea1n s\u1ebd th\u1ea5y nam ch\u00e2m g\u1ed1m s\u1ee9 trong c\u00e1c \u0111\u1ed9ng c\u01a1 m\u1ed9t chi\u1ec1u v\u00e0 m\u00e1y ph\u00e1t \u0111i\u1ec7n \u0111\u1ec3 t\u1ea1o ra tr\u01b0\u1eddng t\u1eeb.<\/p>\n

            B\u1ed9 ph\u00e2n lo\u1ea1i t\u1eeb: B\u1ea1n s\u1eed d\u1ee5ng nam ch\u00e2m g\u1ed1m s\u1ee9 \u0111\u1ec3 t\u00e1ch c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m s\u1eaft trong th\u1ef1c ph\u1ea9m, h\u00f3a ch\u1ea5t v\u00e0 c\u00e1c quy tr\u00ecnh c\u00f4ng nghi\u1ec7p kh\u00e1c.<\/p>\n

            C\u1ea3m bi\u1ebfn \u00f4 t\u00f4: Nam ch\u00e2m g\u1ed1m s\u1ee9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng \u00f4 t\u00f4 nh\u01b0 h\u1ec7 th\u1ed1ng phanh ch\u1ed1ng kh\u00f3a v\u00e0 c\u1ea3m bi\u1ebfn t\u1ed1c \u0111\u1ed9.<\/p>\n

            L\u01b0u tr\u1eef t\u1eeb: C\u00e1c \u1ed5 c\u1ee9ng v\u00e0 b\u0103ng t\u1eeb d\u00f9ng \u0111\u1ec3 ghi \u00e2m, h\u00ecnh \u1ea3nh v\u00e0 d\u1eef li\u1ec7u ch\u1ee9a nam ch\u00e2m g\u1ed1m s\u1ee9.<\/p>\n

            Thi\u1ebft b\u1ecb Vi s\u00f3ng: V\u1eadt li\u1ec7u gyromagnetic cho h\u1ec7 th\u1ed1ng truy\u1ec1n th\u00f4ng vi s\u00f3ng.<\/p>\n

            \u0110\u1ed3ng h\u1ed3 \u0111o Watt-Hour: Nam ch\u00e2m g\u1ed1m s\u1ee9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u0111\u1ed3ng h\u1ed3 \u0111o ti\u1ec7n \u00edch \u0111\u1ec3 \u0111o l\u01b0\u1ee3ng \u0111i\u1ec7n ti\u00eau th\u1ee5.<\/p>\n

            Th\u1ebb t\u1eeb v\u00e0 Phi\u1ebfu th\u01b0\u1edfng: H\u1ec7 th\u1ed1ng thanh to\u00e1n v\u00e9, th\u1ebb ID v\u00e0 phi\u1ebfu du l\u1ecbch s\u1eed d\u1ee5ng nam ch\u00e2m g\u1ed1m s\u1ee9.<\/p>\n

             <\/p>\n

            L\u1ee3i \u00edch c\u1ee7a Nam ch\u00e2m G\u1ed1m s\u1ee9<\/strong><\/span><\/h2>\n

            Nam ch\u00e2m g\u1ed1m s\u1ee9 c\u00f3 m\u1ed9t s\u1ed1 \u01b0u \u0111i\u1ec3m so v\u1edbi c\u00e1c lo\u1ea1i nam ch\u00e2m kh\u00e1c, bao g\u1ed3m:<\/p>\n

            Hi\u1ec7u qu\u1ea3 v\u1ec1 Chi ph\u00ed: Nam ch\u00e2m ferrite l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i nam ch\u00e2m r\u1ebb nh\u1ea5t b\u1ea1n c\u00f3 th\u1ec3 mua. N\u1ebfu b\u1ea1n c\u1ea7n nam ch\u00e2m v\u00e0 chi ph\u00ed l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng, \u0111\u00e2y l\u00e0 l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p.<\/p>\n

            Ch\u1ed1ng \u0103n m\u00f2n: Nam ch\u00e2m g\u1ed1m s\u1ee9 ch\u1ed1ng r\u1ec9 s\u00e9t v\u00e0 \u0103n m\u00f2n. B\u1ea1n kh\u00f4ng c\u1ea7n ph\u1ee7 l\u1edbp b\u1ea3o v\u1ec7 n\u00e0o l\u00ean ch\u00fang.<\/p>\n

            Ch\u1ed1ng m\u1ea5t t\u1eeb: Nam ch\u00e2m g\u1ed1m s\u1ee9 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb tuy\u1ec7t v\u1eddi. Ch\u00fang gi\u1eef \u0111\u01b0\u1ee3c t\u1eeb t\u00ednh theo th\u1eddi gian.<\/p>\n

            \u1ed4n \u0111\u1ecbnh: Nam ch\u00e2m g\u1ed1m s\u1ee9 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t trong ph\u1ea1m vi nhi\u1ec7t \u0111\u1ed9 r\u1ed9ng. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ch\u00fang trong nh\u00e0 ho\u1eb7c ngo\u00e0i tr\u1eddi.<\/p>\n

            Kh\u1ea3 n\u0103ng c\u00f3 s\u1eb5n: B\u1ea1n c\u00f3 th\u1ec3 mua nam ch\u00e2m ferrite v\u1edbi nhi\u1ec1u h\u00ecnh d\u1ea1ng v\u00e0 k\u00edch th\u01b0\u1edbc kh\u00e1c nhau, ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p kh\u00e1c nhau.<\/p>\n

             <\/p>\n

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

            Nam ch\u00e2m g\u1ed1m s\u1ee9 l\u00e0 gi\u1ea3i ph\u00e1p tuy\u1ec7t v\u1eddi, ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00e0 \u0111\u00e1ng tin c\u1eady cho nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p v\u00e0 th\u01b0\u01a1ng m\u1ea1i. Ch\u00fang ch\u1ed1ng \u0103n m\u00f2n v\u00e0 m\u1ea5t t\u1eeb, \u0111\u1ed3ng th\u1eddi gi\u00e1 th\u00e0nh th\u1ea5p. \u0110i\u1ec1u n\u00e0y khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ho\u00e0n h\u1ea3o cho m\u1ecdi th\u1ee9 t\u1eeb \u0111\u1ed9ng c\u01a1 v\u00e0 c\u1ea3m bi\u1ebfn \u0111\u1ebfn b\u1ed9 ph\u00e2n lo\u1ea1i t\u1eeb v\u00e0 thi\u1ebft b\u1ecb truy\u1ec1n th\u00f4ng. V\u1edbi nh\u1eefng ph\u00e1t tri\u1ec3n m\u1edbi trong khoa h\u1ecdc v\u1eadt li\u1ec7u, nam ch\u00e2m g\u1ed1m s\u1ee9 s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u c\u00f4ng ngh\u1ec7 ng\u00e0y nay.<\/p>\n

             <\/p>\n

            \u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 nam ch\u00e2m g\u1ed1m s\u1ee9, \u0111\u1eb7c t\u00ednh v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang, h\u00e3y truy c\u1eadp NBAEM. Ch\u00fang t\u00f4i \u0111\u00e3 b\u00e1n c\u00e1c s\u1ea3n ph\u1ea9m t\u1eeb t\u00ednh ch\u1ea5t l\u01b0\u1ee3ng cao t\u1eeb n\u0103m 2010.<\/p>\n

            \"nam<\/p>\n

             <\/p>","protected":false},"excerpt":{"rendered":"

            Nam ch\u00e2m ceramic, c\u00f2n g\u1ecdi l\u00e0 nam ch\u00e2m ferrite, \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n v\u00e0o nh\u1eefng n\u0103m 1960 nh\u01b0 m\u1ed9t l\u1ef1a ch\u1ecdn thay th\u1ebf gi\u00e1 r\u1ebb cho nam ch\u00e2m kim lo\u1ea1i. Ch\u00fang ch\u1ee7 y\u1ebfu g\u1ed3m oxit s\u1eaft v\u00e0 carbonate stronti. Nam ch\u00e2m ceramic ch\u1ed1ng \u0103n m\u00f2n v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng m\u1ea5t t\u1eeb cao. Ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u00ec gi\u00e1 th\u00e0nh r\u1ebb m\u1ed7i pound v\u00e0 gi\u1eef [\u2026]<\/p>","protected":false},"author":1,"featured_media":635,"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-1434","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/nbaem.com\/wp-content\/uploads\/2022\/06\/ferrite-magnet-\u603b\u56fe.png","_links":{"self":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1434","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=1434"}],"version-history":[{"count":2,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1434\/revisions"}],"predecessor-version":[{"id":2814,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/posts\/1434\/revisions\/2814"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media\/635"}],"wp:attachment":[{"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/media?parent=1434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/categories?post=1434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nbaem.com\/vi\/wp-json\/wp\/v2\/tags?post=1434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}