V\u00e0o n\u0103m 1965, Vi\u1ec7n b\u1ea3o t\u00e0ng t\u1ec9nh H\u1ed3 Nam khai qu\u1eadt \u0111\u01b0\u1ee3c m\u1ed9t ng\u00f4i m\u1ed9 c\u1ed5 n\u01b0\u1edbc S\u1edf t\u1ea1i Giang L\u0103ng, \u0111\u00e3 t\u00ecm th\u1ea5y hai thanh ki\u1ebfm c\u1ed5 ph\u00e1t s\u00e1ng l\u1ea5p l\u00e1nh: Tr\u00ean th\u00e2n ki\u1ebfm m\u00e0u v\u00e0ng c\u00f3 c\u00e1c hoa v\u0103n h\u00ecnh thoi m\u00e0u \u0111en, tr\u00ean th\u00e2n ki\u1ebfm c\u00f3 kh\u1eafc d\u00f2ng ch\u1eef “Thanh ki\u1ebfm c\u1ee7a Vi\u1ec7t v\u01b0\u01a1ng C\u00e2u Ti\u1ec5n”. \u0110\u00f3 ch\u00ednh l\u00e0 thanh ki\u1ebfm C\u00e2u Ti\u1ec5n n\u1ed5i ti\u1ebfng. Hai thanh ki\u1ebfm ch\u00f4n v\u00f9i d\u01b0\u1edbi \u0111\u1ea5t \u0111\u00e3 h\u01a1n 2000 n\u0103m, khi \u0111\u00e0o \u0111\u01b0\u1ee3c \u0111\u00e3 th\u1ea5y ph\u00e1t \u00e1nh s\u00e1ng lo\u00e9 m\u1eaft, r\u1ea5t s\u1eafc b\u00e9n, kh\u00f4ng h\u1ec1 c\u00f3 m\u1ed9t v\u1ebft g\u1ec9 n\u00e0o. \u0110\u1ebfn n\u0103m 1973, khi \u0111em ki\u1ebfm tri\u1ec3n l\u00e3m \u1edf n\u01b0\u1edbc ngo\u00e0i l\u00e0m nhi\u1ec1u kh\u00e1ch tham quan h\u1ebft s\u1ee9c kinh ng\u1ea1c.<\/p>\n\n\n\n
V\u00e0o n\u0103m 1974, t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng L\u00e2m \u0110\u1ed3ng thu\u1ed9c t\u1ec9nh Thi\u1ec3m T\u00e2y ng\u01b0\u1eddi ta ph\u00e1t hi\u1ec7n m\u1ed9t h\u1ea7m m\u1ed9 c\u00e1c chi\u1ebfn binh b\u1eb1ng g\u1ed1m ch\u00f4n c\u00f9ng v\u1edbi T\u1ea7n Thu\u1ef7 Ho\u00e0ng, \u0111\u00e3 \u0111\u00e0o \u0111\u01b0\u1ee3c ba thanh ki\u1ebfm b\u00e1u. Ki\u1ebfm c\u00f3 m\u00e0u \u0111en b\u00f3ng ph\u00e1t ra kh\u00ed l\u1ea1nh kinh ng\u01b0\u1eddi. Ba thanh ki\u1ebfm v\u00f9i s\u00e1u m\u00e9t, d\u01b0\u1edbi t\u1ea7ng \u0111\u1ea5t nh\u00e3o \u0111\u00e3 h\u01a1n 2000 n\u0103m. Khi \u0111\u01b0a ra kh\u1ecfi l\u1edbp \u0111\u1ea5t kh\u00f4ng h\u1ec1 c\u00f3 m\u1ed9t v\u1ebft g\u1ec9, h\u1ebft s\u1ee9c s\u1eafc b\u00e9n c\u00f3 th\u1ec3 ch\u00e9m g\u1ecdn 10 l\u1edbp gi\u1ea5y b\u00e1o l\u00e0m m\u1ecdi ng\u01b0\u1eddi h\u1ebft s\u1ee9c kinh ng\u1ea1c.<\/p>\n\n\n\n
\u0110\u1ec3 t\u00ecm hi\u1ec3u c\u00e1c b\u00ed \u1ea9n v\u1ec1 c\u00e1c thanh ki\u1ebfm kh\u00f4ng b\u1ecb g\u1ec9, ng\u01b0\u1eddi ta \u0111\u00e3 ti\u1ebfn h\u00e0nh ph\u00e2n t\u00edch th\u00e0nh ph\u1ea7n ho\u00e1 h\u1ecdc c\u1ee7a thanh ki\u1ebfm, \u0111\u1eb7c bi\u1ec7t th\u00e0nh ph\u1ea7n ho\u00e1 h\u1ecdc c\u1ee7a l\u1edbp ngo\u00e0i c\u00f9ng. \u0110\u1ec3 kh\u00f4ng l\u00e0m t\u1ed5n h\u1ea1i thanh ki\u1ebfm qu\u00fd, c\u00e1c nh\u00e0 kh\u1ea3o c\u1ed5 d\u00f9ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ph\u00e2n t\u00edch d\u1ee5ng c\u1ee5, ti\u1ebfn h\u00e0nh ki\u1ec3m tra th\u00e0nh ph\u1ea7n c\u00e1c thanh ki\u1ebfm b\u1eb1ng c\u00e1c ph\u00e9p \u0111o \u0111\u1ea1c v\u1eadt l\u00fd. T\u1eeb c\u00e1c k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch ng\u01b0\u1eddi ta t\u00ecm th\u1ea5y th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a thanh ki\u1ebfm l\u00e0 \u0111\u1ed3ng \u0111en l\u00e0 h\u1ee3p kim c\u1ee7a \u0111\u1ed3ng v\u00e0 thi\u1ebfc. Thi\u1ebfc v\u1ed1n l\u00e0 m\u1ed9t kim lo\u1ea1i c\u00f3 t\u00ednh ch\u1ed1ng \u0103n m\u00f2n r\u1ea5t m\u1ea1nh, v\u00ec v\u1eady \u0111\u1ed3ng \u0111en c\u00f3 t\u00ednh ch\u1ed1ng \u0103n m\u00f2n, ch\u1ed1ng b\u1ecb g\u1ec9 r\u1ea5t cao, so v\u1edbi s\u1eaft th\u00ec t\u1ed1t h\u01a1n r\u1ea5t nhi\u1ec1u. Nh\u01b0ng \u0111i\u1ec1u ch\u1ee7 y\u1ebfu l\u00e0 m\u1eb7t ngo\u00e0i c\u1ee7a thanh ki\u1ebfm \u0111\u00e3 qua bi\u1ec7n ph\u00e1p x\u1eed l\u00fd \u0111\u1eb7c bi\u1ec7t.<\/p>\n\n\n\n
Tr\u00ean th\u00e2n ki\u1ebfm m\u00e0u v\u00e0ng c\u1ee7a thanh ki\u1ebfm “Vi\u1ec7t v\u01b0\u01a1ng C\u00e2u Ti\u1ec5n” c\u00f3 c\u00e1c hoa v\u0103n h\u00ecnh qu\u1ea3 tr\u00e1m m\u00e0u \u0111en \u0111\u00e3 \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1eb1ng c\u00e1ch l\u01b0u ho\u00e1 b\u1ec1 m\u1eb7t: Ng\u01b0\u1eddi ta \u0111\u00e3 d\u00f9ng l\u01b0u hu\u1ef3nh ho\u1eb7c c\u00e1c ch\u1ea5t c\u00f3 ch\u1ee9a l\u01b0u hu\u1ef3nh \u0111\u1ec3 x\u1eed l\u00fd b\u1ec1 m\u1eb7t, gi\u1eefa b\u1ec1 m\u1eb7t kim lo\u1ea1i v\u00e0 h\u1ee3p ch\u1ea5t ch\u1ee9a l\u01b0u hu\u1ef3nh ho\u1eb7c l\u01b0u hu\u1ef3nh \u0111\u00e3 x\u1ea3y ra c\u00e1c ph\u1ea3n \u1ee9ng ho\u00e1 h\u1ecdc. Qua c\u00e1ch x\u1eed l\u00fd n\u00e0y, thanh ki\u1ebfm kh\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c t\u0103ng v\u1ebb \u0111\u1eb9p m\u00e0 c\u00f2n t\u0103ng c\u01b0\u1eddng t\u00ednh ch\u1ecbu \u0103n m\u00f2n, t\u00ednh ch\u1ed1ng g\u1ec9 c\u1ee7a thanh ki\u1ebfm b\u00e1u.<\/p>\n\n\n\n
Ba thanh ki\u1ebfm c\u1ed5 \u0111\u1ea1i c\u1ee7a th\u1eddi nh\u00e0 T\u1ea7n c\u00f2n \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1ec1 m\u1eb7t ti\u00ean ti\u1ebfn h\u01a1n. Theo c\u00e1c k\u1ebft qu\u1ea3 ph\u00e2n t\u00edch, ng\u01b0\u1eddi c\u1ed5 \u0111\u1ea1i \u0111\u00e3 x\u1eed l\u00fd b\u1ec1 m\u1eb7t thanh ki\u1ebfm b\u1eb1ng c\u00e1c mu\u1ed1i cromat. Mu\u1ed1i cromat l\u00e0 nh\u1eefng h\u1ee3p ch\u1ea5t c\u00f3 t\u00ednh oxy ho\u00e1 r\u1ea5t m\u1ea1nh. D\u00f9ng c\u00e1ch x\u1eed l\u00fd b\u1eb1ng c\u00e1c cromat, tr\u00ean m\u1eb7t ngo\u00e0i c\u1ee7a thanh ki\u1ebfm s\u1ebd t\u1ea1o th\u00e0nh m\u1ed9t l\u1edbp oxit kim lo\u1ea1i r\u1ea5t m\u1ecfng, r\u1ea5t b\u1ec1n ch\u1eafc, ph\u1ee7 k\u00edn to\u00e0n b\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a thanh ki\u1ebfm. L\u1edbp oxit r\u1ea5t \u1ed5n \u0111\u1ecbnh n\u00e0y d\u00f9 r\u1ea5t m\u1ecfng, ch\u1ec9 d\u00e0y kho\u1ea3ng 1\/100 mm nh\u01b0ng \u0111\u00e3 t\u1ea1o cho thanh ki\u1ebfm m\u1ed9t t\u1ea5m \u00e1o kho\u00e1c ngo\u00e0i r\u1ea5t b\u1ec1n, che k\u00edn to\u00e0n b\u1ed9 kim lo\u1ea1i b\u00ean trong thanh ki\u1ebfm, n\u00ean thanh ki\u1ebfm kh\u00f4ng b\u1ecb g\u1ec9. \u0110i\u1ec1u n\u00e0y ho\u00e0n to\u00e0n gi\u1ed1ng v\u1edbi k\u1ef9 thu\u1eadt x\u1eed l\u00fd b\u1ec1 m\u1eb7t kim lo\u1ea1i hi\u1ec7n \u0111\u1ea1i. C\u1ea7n ch\u00fa \u00fd l\u00e0 \u1edf c\u00e1c n\u01b0\u1edbc ch\u00e2u \u00c2u, k\u1ef9 thu\u1eadt x\u1eed l\u00fd ch\u1ec9 m\u1edbi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u00e0o nh\u1eefng n\u0103m 30 c\u1ee7a th\u1ebf k\u1ef7 XX.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: X\u1eed l\u00fd ho\u00e1 h\u1ecdc b\u1ec1 m\u1eb7t.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
V\u00e0o n\u0103m 1965, Vi\u1ec7n b\u1ea3o t\u00e0ng t\u1ec9nh H\u1ed3 Nam khai qu\u1eadt \u0111\u01b0\u1ee3c m\u1ed9t ng\u00f4i m\u1ed9 c\u1ed5 n\u01b0\u1edbc S\u1edf t\u1ea1i Giang L\u0103ng, \u0111\u00e3 t\u00ecm th\u1ea5y hai thanh ki\u1ebfm c\u1ed5 ph\u00e1t s\u00e1ng l\u1ea5p l\u00e1nh: Tr\u00ean th\u00e2n ki\u1ebfm m\u00e0u v\u00e0ng c\u00f3 c\u00e1c hoa v\u0103n h\u00ecnh thoi m\u00e0u \u0111en, tr\u00ean th\u00e2n ki\u1ebfm c\u00f3 kh\u1eafc d\u00f2ng ch\u1eef “Thanh ki\u1ebfm c\u1ee7a […]<\/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":[8,15],"tags":[],"class_list":["post-7771","post","type-post","status-publish","format-standard","hentry","category-hoa-hoc","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7771","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=7771"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7771\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7771"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7771"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7771"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}