T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 – Arkady Leokum<\/p>\n\n\n\n
K\u1ec1n k\u1ebft h\u1ee3p v\u1edbi nhi\u1ec1u kim lo\u1ea1i kh\u00e1c \u0111\u1ec3 t\u1ea1o th\u00e0nh nhi\u1ec1u h\u1ee3p kim \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00f4ng nghi\u1ec7p v\u1edbi r\u1ea5t nhi\u1ec1u c\u00f4ng d\u1ee5ng. \u0111\u00f3 l\u00e0 m\u1ed9t trong nh\u1eefng kim lo\u1ea1i h\u1eefu d\u1ee5ng nh\u1ea5t m\u00e0 con ng\u01b0\u1eddi bi\u1ebft \u0111\u01b0\u1ee3c. Nh\u01b0ng th\u1eddi x\u01b0a k\u1ec1n \u0111\u00e3 l\u00e0m cho c\u00e1c nh\u00e0 h\u00f3a h\u1ecdc b\u1ed1i r\u1ed1i kh\u00f4ng \u00edt khi h\u1ecd c\u1ed1 x\u1eed l\u00fd n\u00f3. K\u1ec1n – nikel – c\u00f3 g\u1ed1c ti\u1ebfng \u0111\u1ee9c v\u00e0 c\u00f3 ngh\u0129a l\u00e0 \u201cti\u1ec3u y\u00eau\u201d. trong c\u00e1c thi\u00ean th\u1ea1ch ng\u01b0\u1eddi ta c\u0169ng t\u00ecm th\u1ea5y d\u1ea5u v\u1ebft c\u1ee7a k\u1ec1n. \u0111\u00f4i khi k\u1ec1n c\u0169ng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5t trong tr\u1ea1ng th\u00e1i nguy\u00ean ch\u1ea5t v\u1edbi s\u1ed1 l\u01b0\u1ee3ng nh\u1ecf. Nh\u01b0ng ngu\u1ed3n cung c\u1ea5p nhi\u1ec1u k\u1ec1n nh\u1ea5t l\u00e0 t\u1eeb m\u1ed9t v\u00e0i lo\u1ea1i qu\u1eb7ng, nh\u1ea5t l\u00e0 qu\u1eb7ng \u201cpyrrhotite\u201d, m\u1ed9t t\u1ea1p qu\u1eb7ng g\u1ed3m k\u1ec1n, \u0111\u1ed3ng v\u00e0 s\u1eaft. Canada l\u00e0 n\u01b0\u1edbc s\u1ea3n xu\u1ea5t nhi\u1ec1u k\u1ec1n nh\u1ea5t.<\/p>\n\n\n\n
Qu\u1eb7ng c\u00f3 ch\u1ee9a k\u1ec1n th\u01b0\u1eddng \u0111\u01b0\u1ee3c nung n\u00f3ng trong nh\u1eefng l\u00f2 h\u01a1i \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t h\u1ed7n h\u1ee3p g\u1ecdi l\u00e0 \u201cmatte\u201d. Lo\u1ea1i d\u1ea7n t\u1ea1p ch\u1ea5t trong h\u1ed7n h\u1ee3p n\u00e0y b\u1eb1ng c\u00e1ch tr\u1ed9n n\u00f3 v\u1edbi than c\u1ed1c r\u1ed3i nung trong l\u00f2 h\u01a1i, ta s\u1ebd \u0111\u01b0\u1ee3c k\u1ec1n.<\/p>\n\n\n\n
K\u1ec1n s\u00e1ng b\u00f3ng, c\u1ee9ng, t\u00e1n m\u1ecfng \u0111\u01b0\u1ee3c. t\u00ednh n\u0103ng n\u00e0y khi\u1ebfn k\u1ec1n d\u1ec5 \u00e9p khu\u00f4n. K\u1ec1n c\u00f2n l\u00e0 kim lo\u1ea1i d\u1ec5 nhi\u1ec5m t\u1eeb (magnetic) nh\u1ea5t m\u00e0 ta bi\u1ebft \u0111\u01b0\u1ee3c, tr\u1eeb khi n\u00f3 b\u1ecb hun n\u00f3ng.<\/p>\n\n\n\n
R\u1ea5t \u00edt khi ta nh\u00ecn th\u1ea5y k\u1ec1n \u1edf d\u1ea1ng nguy\u00ean ch\u1ea5t, tr\u1eeb khi th\u1ea5y n\u00f3 \u0111\u01b0\u1ee3c m\u1ea1 tr\u00ean nh\u0169ng lo\u1ea1i kh\u00e1c. L\u1edbp k\u1ec1n m\u1ea1 tr\u00ean kim lo\u1ea1i gi\u00fap cho kim lo\u1ea1i n\u00e0y kh\u00f4ng (hay l\u00e0 kh\u00f3) b\u1ecb r\u1ec9 s\u00e9t, \u0111\u1ed3ng th\u1eddi n\u01b0\u1edbc s\u00e1ng b\u00f3ng c\u1ee7a n\u00f3 l\u00e0m cho v\u1eeba \u0111\u1eb9p, v\u1eeba b\u1ea3o v\u1ec7 \u0111\u01b0\u1ee3c m\u1eb7t ngo\u00e0i c\u1ee7a d\u1ee5ng c\u1ee5. H\u1ea7u h\u1ebft k\u1ec1n \u0111\u1ec1u \u0111\u01b0\u1ee3c d\u00f9ng d\u01b0\u1edbi d\u1ea1ng h\u1ee3p kim. Ch\u1eb3ng h\u1ea1n, pha v\u1edbi \u0111\u1ed3ng \u0111\u1ec3 l\u00e0m ti\u1ec1n. Khi pha ba ph\u1ea7n \u0111\u1ed3ng, m\u1ed9t ph\u1ea7n k\u1ebdm v\u00e0 k\u1ec1n ta c\u00f3 m\u1ed9t h\u1ee3p kim g\u1ecdi l\u00e0 \u201cb\u1ea1c k\u1ec1n\u201d hay l\u00e0 \u201cb\u1ea1c c\u1ee7a (ng\u01b0\u1eddi) \u0111\u1ee9c\u201d (German nikel). H\u1ee3p kim n\u00e0y c\u00f2n \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ch\u1ebf t\u1ea1o mu\u1ed7ng, n\u0129a d\u00f9ng tr\u00ean b\u00e0n \u0103n.<\/p>\n\n\n\n
N\u1ebfu ch\u1ec9 d\u00f9ng k\u1ec1n l\u00e0m h\u1ee3p kim \u0111\u00fac ti\u1ec1n, ch\u1ebf t\u1ea1o mu\u1ed7ng n\u0129a th\u00ec c\u00f4ng d\u1ee5ng c\u1ee7a k\u1ec1n v\u1eabn c\u00f2n t\u01b0\u01a1ng \u0111\u1ed1i h\u1ea1n h\u1eb9p. H\u1ea7u h\u1ebft k\u1ec1n \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 ch\u1ebf t\u1ea1o ra m\u1ed9t h\u1ee3p kim l\u00e0 th\u00e9p – k\u1ec1n, m\u1ed9t h\u1ee3p kim quan tr\u1ecdng \u0111\u1ec3 l\u00e0m l\u00f2 xo. H\u1ee3p kim n\u00e0y c\u00f2n \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m c\u1ea7u, \u0111\u01b0\u1eddng xe l\u1eeda \u1edf nh\u1eefng \u0111o\u1ea1n c\u1ea7n u\u1ed1n cong, \u0111inh \u1ed1c, n\u1ed3i h\u01a1i, tr\u1ee5c v\u00e0 h\u1ed9p s\u1ed1 xe, \u201cch\u00e2n v\u1ecbt\u201d t\u00e0u th\u1ee7y\u2026<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 2 – Arkady Leokum K\u1ec1n k\u1ebft h\u1ee3p v\u1edbi nhi\u1ec1u kim lo\u1ea1i kh\u00e1c \u0111\u1ec3 t\u1ea1o th\u00e0nh nhi\u1ec1u h\u1ee3p kim \u0111\u01b0\u1ee3c d\u00f9ng trong c\u00f4ng nghi\u1ec7p v\u1edbi r\u1ea5t nhi\u1ec1u c\u00f4ng d\u1ee5ng. \u0111\u00f3 l\u00e0 m\u1ed9t trong nh\u1eefng kim lo\u1ea1i h\u1eefu d\u1ee5ng nh\u1ea5t m\u00e0 con ng\u01b0\u1eddi bi\u1ebft \u0111\u01b0\u1ee3c. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15],"tags":[],"class_list":["post-13752","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13752","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=13752"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/13752\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=13752"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=13752"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=13752"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}