silica<\/a> cao mullite \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p th\u00e0nh c\u00f4ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng gangue than v\u00e0 cao lanh l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 v\u00e0 th\u00eam fenspat kali. Nghi\u00ean c\u1ee9u cho th\u1ea5y nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft c\u1ee7a h\u1ed7n h\u1ee3p kh\u00f4ng th\u00eam kali fenspat l\u00e0 tr\u00ean 1590\u00b0C, trong khi nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft c\u1ee7a h\u1ed7n h\u1ee3p c\u00f3 t\u1ef7 l\u1ec7 K2O l\u00e0 1,5% v\u00e0 th\u00eam kali fenspat c\u00f3 th\u1ec3 gi\u1ea3m xu\u1ed1ng 1530\u00b0C. Do \u0111\u00f3, th\u00eam m\u1ed9t l\u01b0\u1ee3ng kali fenspat nh\u1ea5t \u0111\u1ecbnh v\u00e0o h\u1ed7n h\u1ee3p c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m nhi\u1ec7t \u0111\u1ed9 thi\u00eau k\u1ebft.<\/p>\nS\u1eed d\u1ee5ng gangue than l\u00e0m nguy\u00ean li\u1ec7u th\u00f4, gangue \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1eb1ng c\u00e1ch lo\u1ea1i b\u1ecf t\u1ea1p ch\u1ea5t, nung v\u00e0 c\u00e1c quy tr\u00ecnh kh\u00e1c, v\u00e0 v\u1eadt li\u1ec7u b\u1ed9t h\u1ed7n h\u1ee3p nano-mullite \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng qu\u00e1 tr\u00ecnh k\u1ebft tinh th\u1ee7y nhi\u1ec7t. K\u1ebft qu\u1ea3 cho th\u1ea5y pha composite nano-mullite \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf t\u1eeb b\u1ed9t than ho\u1ea1t t\u00ednh gangue trong \u0111i\u1ec1u ki\u1ec7n dung d\u1ecbch natri hydroxit n\u1ed3ng \u0111\u1ed9 2-4mol\/L, nhi\u1ec7t \u0111\u1ed9 khu\u1ea5y 80-90\u00b0C, th\u1eddi gian b\u1ea3o qu\u1ea3n nhi\u1ec7t 3h, v\u00e0 t\u1ef7 l\u1ec7 l\u1ecfng-r\u1eafn l\u00e0 10mL\/g. B\u1ed9t, b\u1ed9t h\u1ed7n h\u1ee3p nano-mullite c\u00f3 hi\u1ec7u \u1ee9ng k\u1ebft tinh t\u1ed1t, h\u1ea7u h\u1ebft l\u00e0 tinh th\u1ec3 c\u1ed9t, chi\u1ec1u d\u00e0i h\u1ea1t l\u00e0 50nm v\u00e0 t\u1ef7 l\u1ec7 khung h\u00ecnh trung b\u00ecnh \u0111\u1ea1t 3,5.<\/p>\n
2. Silon d\u00e0y \u0111\u1eb7c v\u00e0 v\u1eadt li\u1ec7u composite c\u1ee7a n\u00f3<\/p>\n
S\u1eed d\u1ee5ng gangue than nh\u00f4m cao, b\u1ed9t c\u00f4 \u0111\u1eb7c s\u1eaft v\u00e0 b\u1ed9t than c\u1ed1c l\u00e0m nguy\u00ean li\u1ec7u th\u00f4, v\u1eadt li\u1ec7u \u0111\u1eadm \u0111\u1eb7c h\u1ed7n h\u1ee3p Fe-Sialon \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p th\u1ea5m nit\u01a1 kh\u1eed nhi\u1ec7t \u1edf 1400-1550\u00b0C trong 4 gi\u1edd. Ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng h\u00e0m l\u01b0\u1ee3ng than c\u1ed1c v\u01b0\u1ee3t qu\u00e1 10% 1. V\u1eadt li\u1ec7u \u0111\u1eadm \u0111\u1eb7c Fe-Sialon \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb \u1edf 1500\u2103 trong 4 gi\u1edd c\u00f3 s\u1ef1 ph\u00e2n b\u1ed1 h\u1ea1t \u0111\u1ed3ng \u0111\u1ec1u nh\u1ea5t v\u00e0 hi\u1ec7u su\u1ea5t t\u1ed1t nh\u1ea5t.<\/p>\n
S\u1eed d\u1ee5ng gangue than v\u00e0 \u0111\u1ea5t s\u00e9t t\u1ef1 nhi\u00ean l\u00e0m nguy\u00ean li\u1ec7u ch\u00ednh, quy tr\u00ecnh \u0111\u00fac keo \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o h\u00ecnh th\u00e2n m\u00e0u xanh l\u00e1 c\u00e2y v\u00e0 v\u1eadt li\u1ec7u g\u1ed1m d\u00e0y \u0111\u1eb7c h\u1ed7n h\u1ee3p \u03b2-Sialon\/SiC \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p th\u00e0nh c\u00f4ng b\u1eb1ng quy tr\u00ecnh th\u1ea5m nit\u01a1 kh\u1eed nhi\u1ec7t. Nghi\u00ean c\u1ee9u cho th\u1ea5y r\u1eb1ng quy tr\u00ecnh \u0111\u00fac keo \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o ra v\u1eadt th\u1ec3 m\u00e0u xanh l\u00e1 c\u00e2y v\u1edbi m\u1eadt \u0111\u1ed9 cao t\u1edbi 1,12g\/cm3 v\u00e0 v\u1eadt li\u1ec7u composite \u03b2-Sialon\/SiC \u0111\u1eadm \u0111\u1eb7c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t sau khi thi\u00eau k\u1ebft.<\/p>\n","protected":false},"excerpt":{"rendered":"
Qua nghi\u00ean c\u1ee9u, ng\u01b0\u1eddi ta th\u1ea5y r\u1eb1ng c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh trong gangue than l\u00e0 alumina v\u00e0 silica, v\u00e0 c\u00e1c h\u1ee3p ch\u1ea5t n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 \u0111\u1ec3 s\u1ea3n xu\u1ea5t g\u1ed1m s\u1ee9.<\/p>\n","protected":false},"author":7,"featured_media":125373,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-125480","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghiep-tin-tuc-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/125480","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=125480"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/125480\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/125373"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=125480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=125480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=125480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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