Ng\u00e0y nay m\u00e1y ghi \u00e2m, m\u00e1y ghi h\u00ecnh \u0111\u00e3 tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 ph\u1ed5 c\u1eadp, lo\u1ea1i d\u1ee5ng c\u1ee5 \u0111i\u1ec7n ph\u1ed5 bi\u1ebfn trong c\u00e1c gia \u0111\u00ecnh. Trong m\u00e1y ghi \u00e2m, m\u00e1y ghi h\u00ecnh \u0111\u1ec1u c\u1ea7n c\u00f3 b\u0103ng t\u1eeb. Nh\u1edd c\u00f3 \u0111\u1ea7u t\u1eeb m\u00e0 m\u00e1y ghi \u00e2m, ghi h\u00ecnh ghi l\u1ea1i \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u \u00e2m thanh v\u00e0 t\u00edn hi\u1ec7u h\u00ecnh. Th\u1ebf th\u00ec b\u0103ng t\u1eeb v\u00e0 \u0111\u1ea7u t\u1eeb \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng v\u1eadt li\u1ec7u c\u00f3 t\u00ednh n\u0103ng \u0111\u1eb7c bi\u1ec7t g\u00ec?<\/p>\n\n\n\n
M\u00e1y ghi \u00e2m v\u00e0 m\u00e1y ghi h\u00ecnh l\u00e0m vi\u1ec7c d\u1ef1a v\u00e0o s\u1ef1 bi\u1ebfn \u0111\u1ed5i t\u01b0\u01a1ng h\u1ed7 gi\u1eefa t\u1eeb tr\u01b0\u1eddng v\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 ghi l\u1ea1i t\u00edn hi\u1ec7u \u00e2m thanh v\u00e0 h\u00ecnh \u1ea3nh. B\u0103ng t\u1eeb gi\u1ed1ng nh\u01b0 m\u1ed9t “t\u1edd gi\u1ea5y” c\u00f3 th\u1ec3 ghi l\u1ea1i v\u00e0 l\u01b0u gi\u1eef th\u00f4ng tin, c\u00f2n \u0111\u1ea7u t\u1eeb c\u00f3 c\u00f4ng n\u0103ng nh\u01b0 “b\u00fat ghi” v\u00e0 “c\u00f4ng c\u1ee5 \u0111\u1ec3 \u0111\u1ecdc”; nh\u1edd c\u00f3 \u0111\u1ea7u t\u1eeb, c\u00e1c t\u00edn hi\u1ec7u \u00e2m thanh v\u00e0 h\u00ecnh \u1ea3nh \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh d\u00f2ng \u0111i\u1ec7n v\u00e0 t\u00edn hi\u1ec7u \u0111\u01b0\u1ee3c ghi l\u00ean b\u0103ng t\u1eeb. \u0110\u1ea7u t\u1eeb l\u1ea1i c\u00f3 th\u1ec3 chuy\u1ec3n c\u00e1c t\u00edn hi\u1ec7u \u00e2m thanh v\u00e0 h\u00ecnh \u1ea3nh tr\u00ean b\u0103ng t\u1eeb th\u00e0nh t\u00edn hi\u1ec7u d\u00f2ng \u0111i\u1ec7n. V\u00ec v\u1eady b\u0103ng t\u1eeb v\u00e0 \u0111\u1ea7u t\u1eeb tr\u00ean c\u00e1c m\u00e1y ghi \u00e2m, ghi h\u00ecnh \u0111\u1ec1u \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng v\u1eadt li\u1ec7u c\u00f3 t\u1eeb t\u00ednh.<\/p>\n\n\n\n
B\u0103ng t\u1eeb c\u00f3 \u0111\u1ebf l\u00e0 m\u00e0ng m\u1ecfng l\u00e0m b\u1eb1ng ch\u1ea5t d\u1ebbo h\u1ecd polyeste ho\u1eb7c s\u1ee3i axetat xenluloza, b\u00ean tr\u00ean c\u00f3 ph\u1ee7 m\u1ed9t l\u1edbp b\u1ed9t v\u1eadt li\u1ec7u c\u00f3 t\u1eeb t\u00ednh. C\u00f3 nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u t\u1eeb t\u00ednh \u0111\u01b0\u1ee3c ph\u1ee7 l\u00ean b\u0103ng t\u1eeb nh\u01b0 oxit s\u1eaft t\u1eeb, h\u1ec7 s\u1eaft – coban, h\u1ec7 crom – coban, h\u1ec7 mangan – bimut\u2026 \u0110\u1ea7u t\u1eeb c\u0169ng \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u t\u1eeb kh\u00e1c nhau nh\u01b0 h\u1ec7 s\u1eaft, niken – niobi, h\u1ec7 s\u1eaft – nh\u00f4m, h\u1ec7 niken – s\u1eaft – tantan\u2026 C\u00e1c v\u1eadt li\u1ec7u s\u1eaft t\u1eeb th\u01b0\u1eddng d\u00f9ng \u0111a s\u1ed1 l\u00e0 h\u1ee3p kim c\u1ee7a s\u1eaft.<\/p>\n\n\n\n
Trong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, c\u00e1c nh\u00e0 khoa h\u1ecdc l\u1ea1i ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c lo\u1ea1i v\u1eadt li\u1ec7u t\u1eeb t\u00ednh l\u00fd t\u01b0\u1edfng – lo\u1ea1i h\u1ee3p kim kh\u00f4ng \u1edf tr\u1ea1ng th\u00e1i tinh th\u1ec3: Ng\u01b0\u1eddi ta cho nung kim lo\u1ea1i \u0111\u1ebfn tr\u1ea1ng th\u00e1i l\u1ecfng \u0111\u1eb7c qu\u00e1nh r\u1ed3i l\u00e0m l\u1ea1nh nhanh. Trong kim lo\u1ea1i, c\u00e1c nguy\u00ean t\u1eed \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo quy t\u1eafc x\u00e1c \u0111\u1ecbnh. V\u1edbi kim lo\u1ea1i \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng tinh th\u1ec3, nguy\u00ean t\u1eed kim lo\u1ea1i kh\u00f4ng s\u1eafp x\u1ebfp theo quy lu\u1eadt, do \u0111\u00f3 c\u00e1c kim lo\u1ea1i \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac tinh th\u1ec3 c\u00f3 m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t kh\u00e1c v\u1edbi kim lo\u1ea1i \u1edf tr\u1ea1ng th\u00e1i tinh th\u1ec3. Tr\u01b0\u1edbc h\u1ebft, \u0111\u00e2y l\u00e0 nh\u1eefng ch\u1ea5t c\u00f3 su\u1ea5t d\u1eabn t\u1eeb cao v\u00e0 d\u1ec5 tr\u1edf th\u00e0nh ch\u1ea5t c\u00f3 t\u1eeb t\u00ednh m\u1ea1nh. Hai l\u00e0 c\u00e1c kim lo\u1ea1i \u1edf tr\u1ea1ng th\u00e1i n\u00e0y th\u01b0\u1eddng l\u00e0 r\u1ea5t c\u1ee9ng, ch\u1ecbu \u0111\u1ef1ng \u0103n m\u00f2n. Hai \u0111\u1eb7c \u0111i\u1ec3m v\u1eeba n\u00eau tr\u00ean h\u1ebft s\u1ee9c thu\u1eadn l\u1ee3i cho vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c h\u1ee3p kim \u0111\u1ec3 ch\u1ebf t\u1ea1o c\u00e1c \u0111\u1ea7u t\u1eeb c\u1ee7a m\u00e1y ghi \u00e2m v\u00e0 \u0111\u1ea7u t\u1eeb l\u00e0 b\u1ed9 l\u01b0u tr\u1eef t\u1eeb cho m\u00e1y t\u00ednh \u0111i\u1ec7n t\u1eed. Theo c\u00e1c s\u1ed1 li\u1ec7u th\u1ef1c nghi\u1ec7m d\u00f9ng lo\u1ea1i \u0111\u1ea7u t\u1eeb b\u1eb1ng v\u1eadt li\u1ec7u t\u1eeb m\u1edbi n\u00e0y, t\u00ednh ch\u1ecbu m\u00e0i m\u00f2n t\u0103ng 20% so v\u1edbi v\u1eadt li\u1ec7u kim lo\u1ea1i \u1edf tr\u1ea1ng th\u00e1i k\u1ebft tinh. Theo d\u1ef1 \u0111o\u00e1n c\u1ee7a c\u00e1c nh\u00e0 khoa h\u1ecdc, trong t\u01b0\u01a1ng lai, h\u1ee3p kim \u1edf tr\u1ea1ng th\u00e1i kh\u00f4ng k\u1ebft tinh s\u1ebd \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m v\u1eadt li\u1ec7u d\u1eabn t\u1eeb trong nung ch\u1ea3y h\u1ea1t nh\u00e2n, trong xe l\u1eeda \u0111\u1ec7m t\u1eeb.<\/p>\n\n\n\n
T\u1eeb kho\u00e1: \u0110\u1ea7u t\u1eeb; V\u1eadt li\u1ec7u t\u1eeb t\u00ednh; H\u1ee3p kim tr\u1ea1ng th\u00e1i kh\u00f4ng k\u1ebft<\/p>\n\n\n\n
<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ng\u00e0y nay m\u00e1y ghi \u00e2m, m\u00e1y ghi h\u00ecnh \u0111\u00e3 tr\u1edf th\u00e0nh c\u00f4ng c\u1ee5 ph\u1ed5 c\u1eadp, lo\u1ea1i d\u1ee5ng c\u1ee5 \u0111i\u1ec7n ph\u1ed5 bi\u1ebfn trong c\u00e1c gia \u0111\u00ecnh. Trong m\u00e1y ghi \u00e2m, m\u00e1y ghi h\u00ecnh \u0111\u1ec1u c\u1ea7n c\u00f3 b\u0103ng t\u1eeb. Nh\u1edd c\u00f3 \u0111\u1ea7u t\u1eeb m\u00e0 m\u00e1y ghi \u00e2m, ghi h\u00ecnh ghi l\u1ea1i \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u \u00e2m thanh v\u00e0 […]<\/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-7904","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\/7904","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=7904"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7904\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}