C\u00f3 th\u1ec3 l\u00e0m cho v\u1eadt li\u1ec7u g\u1ed1m trong su\u1ed1t nh\u01b0 thu\u1ef7 tinh \u0111\u01b0\u1ee3c kh\u00f4ng? C\u00f3 th\u1ec3, c\u00e1c b\u1ea1n c\u00f3 th\u1ea5y tr\u00ean \u0111\u01b0\u1eddng ph\u1ed1 c\u00f3 lo\u1ea1i \u0111\u00e8n \u0111\u01b0\u1ee3c ph\u00e1t ra \u00e1nh s\u00e1ng v\u00e0ng r\u1ea5t \u0111\u1eb9p, v\u1eeba s\u00e1ng l\u1ea1i v\u1eeba kh\u00f4ng g\u00e2y ch\u00f3i m\u1eaft. \u0110\u00f3 l\u00e0 \u0111\u00e8n natri \u00e1p su\u1ea5t cao (\u0111\u00e8n cao \u00e1p). V\u1edbi c\u00f9ng l\u01b0\u1ee3ng \u0111i\u1ec7n ti\u00eau hao nh\u01b0 nhau, so v\u1edbi lo\u1ea1i \u0111\u00e8n \u0111i\u1ec7n th\u01b0\u1eddng, \u0111\u00e8n natri cao \u00e1p s\u00e1ng g\u1ea5p h\u01a1n 10 l\u1ea7n, tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u00e8n g\u1ea5p 20 l\u1ea7n. Nguy\u00ean li\u1ec7u \u0111\u1ec3 s\u1ea3n xu\u1ea5t b\u00f3ng \u0111\u00e8n natri cao \u00e1p kh\u00f4ng ph\u1ea3i l\u00e0 th\u1ee7y tinh th\u01b0\u1eddng ngay c\u1ea3 thu\u1ef7 tinh th\u1ea1ch anh c\u0169ng kh\u00f4ng th\u00edch h\u1ee3p. V\u1eadt li\u1ec7u s\u1ea3n xu\u1ea5t b\u00f3ng \u0111\u00e8n natri cao \u00e1p ph\u1ea3i kh\u00f4ng b\u1ecb \u0103n m\u00f2n v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c \u00e1p su\u1ea5t cao. C\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ph\u1ea3i tr\u1ea3i qua kho\u1ea3ng 30 n\u0103m mi\u1ec7t m\u00e0i nghi\u00ean c\u1ee9u m\u1edbi t\u00ecm \u0111\u01b0\u1ee3c lo\u1ea1i v\u1eadt li\u1ec7u \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c c\u00e1c y\u00eau c\u1ea7u \u0111\u00f3. \u0110\u00f3 l\u00e0 lo\u1ea1i g\u1ed1m trong su\u1ed1t.<\/p>\n\n\n\n
B\u1ea1n c\u00f3 nghe n\u00f3i \u0111\u1ebfn ng\u1ecdc \u0111\u1ecf (h\u1ed3ng ng\u1ecdc) ch\u01b0a? H\u1ed3ng ng\u1ecdc ph\u00e1t \u00e1nh s\u00e1ng \u0111\u1ecf lo\u00e9 m\u1eaft l\u1ea1i trong su\u1ed1t. H\u1ed3ng ng\u1ecdc c\u00f3 th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0 nh\u00f4m oxit c\u00f3 l\u1eabn m\u1ed9t \u00edt crom oxit m\u00e0 c\u00f3 \u0111\u01b0\u1ee3c \u00e1nh s\u00e1ng \u0111\u1ecf \u0111\u1eb9p m\u1eaft. N\u1ebfu trong h\u1ed3ng ng\u1ecdc ch\u1ec9 ch\u1ee9a nh\u00f4m oxit m\u00e0 kh\u00f4ng c\u00f3 crom oxit th\u00ec ch\u1ec9 c\u00f3 m\u00e0u tr\u1eafng (ng\u1ecdc tr\u1eafng hay c\u00f2n g\u1ecdi l\u00e0 b\u1ea1ch ng\u1ecdc t\u1ee9c c\u01b0\u01a1ng ng\u1ecdc). C\u01b0\u01a1ng ng\u1ecdc l\u00e0 nh\u1eefng tinh th\u1ec3 trong su\u1ed1t nh\u01b0 th\u1ee7y tinh. Nh\u01b0ng kh\u00e1c v\u1edbi th\u1ee7y tinh, c\u01b0\u01a1ng ng\u1ecdc kh\u00f4ng b\u1ecb \u0103n m\u00f2n khi ti\u1ebfp x\u00fac v\u1edbi h\u01a1i natri. \u0110i\u1ec1u \u0111\u00f3 \u0111\u00e3 g\u1ee3i \u00fd cho c\u00e1c nh\u00e0 khoa h\u1ecdc d\u00f9ng nh\u00f4m oxit tinh khi\u1ebft thi\u00eau k\u1ebft \u0111\u1ec3 s\u1ea3n xu\u1ea5t g\u1ed1m trong su\u1ed1t. Ban \u0111\u1ea7u khi d\u00f9ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y ng\u01b0\u1eddi ta nh\u1eadn \u0111\u01b0\u1ee3c lo\u1ea1i g\u1ed1m c\u00f3 nhi\u1ec1u b\u00f3ng kh\u00ed. T\u1ea1i sao v\u1eady? V\u00ec h\u1ed3ng ng\u1ecdc v\u00e0 c\u01b0\u01a1ng ng\u1ecdc l\u00e0 c\u00e1c \u0111\u01a1n tinh th\u1ec3, c\u00f2n lo\u1ea1i g\u1ed1m ch\u1ebf t\u1ea1o nh\u01b0 tr\u00ean l\u00e0 nh\u1eefng \u0111a tinh th\u1ec3 do v\u00f4 s\u1ed1 c\u00e1c tinh th\u1ec3 c\u01b0\u01a1ng ng\u1ecdc nh\u1ecf k\u1ebft h\u1ee3p nhau t\u1ea1o n\u00ean, n\u00ean gi\u1eefa c\u00e1c tinh th\u1ec3 nh\u1ecf c\u00f3 th\u1ec3 c\u00f3 c\u00e1c khe h\u1edf, t\u1ea1o n\u00ean c\u00e1c b\u00f3ng kh\u00ed. C\u00e1c b\u00f3ng khi n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 trong su\u1ed1t c\u1ee7a g\u1ed1m t\u1ea1o th\u00e0nh. T\u1eeb \u0111\u00f3 c\u00e1c nh\u00e0 khoa h\u1ecdc \u0111\u00e3 ngh\u0129 \u0111\u1ebfn vi\u1ec7c d\u00f9ng m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf magie oxit \u201c\u0111\u1ec3 lo\u1ea1i tr\u1eeb\u201d c\u00e1c b\u00f3ng kh\u00ed khi thi\u00eau k\u1ebft (nung \u1edf nhi\u1ec7t \u0111\u1ed9 cao) l\u00e0m cho \u00e1nh s\u00e1ng d\u1ec5 d\u00e0ng truy\u1ec1n qua g\u1ed1m. Sau khi ti\u1ebfn h\u00e0nh nhi\u1ec1u th\u00ed nghi\u1ec7m, cu\u1ed1i c\u00f9ng ng\u01b0\u1eddi ta \u0111\u00e3 ch\u1ebf t\u1ea1o \u0111\u01b0\u1ee3c lo\u1ea1i g\u1ed1m nh\u00f4m oxit trong su\u1ed1t.<\/p>\n\n\n\n
So v\u1edbi thu\u1ef7 tinh th\u01b0\u1eddng, g\u1ed1m trong su\u1ed1t kh\u00f4ng ch\u1ec9 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao, kh\u00f4ng b\u1ecb h\u01a1i natri \u0103n m\u00f2n m\u00e0 c\u00f2n c\u00f3 \u0111\u1ed9 c\u1ee9ng r\u1ea5t cao. Do \u0111\u00f3 g\u1ed1m trong su\u1ed1t kh\u00f4ng ch\u1ec9 d\u00f9ng \u0111\u1ec3 ch\u1ebf b\u00f3ng \u0111\u00e8n natri cao \u00e1p m\u00e0 c\u00f2n d\u00f9ng l\u00e0m c\u1eeda s\u1ed5 ch\u1eafn gi\u00f3 cho m\u00e1y bay si\u00eau thanh, l\u00e0m k\u00ednh ch\u1ed1ng \u0111\u1ea1n cho \u00f4 t\u00f4 con cao c\u1ea5p. Kh\u1ea3 n\u0103ng ch\u1ed1ng \u0111\u1ea1n c\u1ee7a g\u1ed1m trong su\u1ed1t g\u1ea7n t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi ng\u1ecdc lam. Ngo\u00e0i ra g\u1ed1m trong su\u1ed1t c\u00f2n trong su\u1ed1t v\u1edbi s\u00f3ng v\u00f4 tuy\u1ebfn \u0111i\u1ec7n n\u00ean c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 ch\u1ebf t\u1ea1o v\u1ecf b\u1ecdc c\u1ee7a anten ra\u0111a, v\u1ecf b\u1ecdc cho m\u00e1y bay. G\u1ed1m trong su\u1ed1t c\u00f3 ph\u1ea1m vi s\u1eed d\u1ee5ng ng\u00e0y c\u00e0ng r\u1ed9ng r\u00e3i theo tr\u00ecnh \u0111\u1ed9 ph\u00e1t tri\u1ec3n c\u1ee7a khoa h\u1ecdc k\u1ef9 thu\u1eadt.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: G\u1ed1m trong su\u1ed1t; \u0110\u00e8n natri cao \u00e1p; Nh\u00f4m oxit.<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
C\u00f3 th\u1ec3 l\u00e0m cho v\u1eadt li\u1ec7u g\u1ed1m trong su\u1ed1t nh\u01b0 thu\u1ef7 tinh \u0111\u01b0\u1ee3c kh\u00f4ng? C\u00f3 th\u1ec3, c\u00e1c b\u1ea1n c\u00f3 th\u1ea5y tr\u00ean \u0111\u01b0\u1eddng ph\u1ed1 c\u00f3 lo\u1ea1i \u0111\u00e8n \u0111\u01b0\u1ee3c ph\u00e1t ra \u00e1nh s\u00e1ng v\u00e0ng r\u1ea5t \u0111\u1eb9p, v\u1eeba s\u00e1ng l\u1ea1i v\u1eeba kh\u00f4ng g\u00e2y ch\u00f3i m\u1eaft. \u0110\u00f3 l\u00e0 \u0111\u00e8n natri \u00e1p su\u1ea5t cao (\u0111\u00e8n cao \u00e1p). V\u1edbi c\u00f9ng l\u01b0\u1ee3ng […]<\/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-7837","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\/7837","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=7837"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7837\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7837"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7837"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7837"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}