Karbid k\u0159em\u00edku se ji\u017e od 19. stolet\u00ed dlouhodob\u011b pou\u017e\u00edv\u00e1 jako brusivo pro brou\u0161en\u00ed k\u0159ehk\u00fdch povrch\u016f. Tento tvrd\u00fd materi\u00e1l se nav\u00edc vyu\u017e\u00edv\u00e1 tak\u00e9 p\u0159i v\u00fdrob\u011b \u017e\u00e1ruvzdorn\u00fdch materi\u00e1l\u016f, opot\u0159ebiteln\u00fdch d\u00edl\u016f a topn\u00fdch prvk\u016f, stejn\u011b jako polovodi\u010dov\u00fdch sou\u010d\u00e1stek.<\/p>\n
Dopov\u00e1n\u00ed hlin\u00edkem, borem, galiem a dus\u00edkem za \u00fa\u010delem v\u00fdroby polovodi\u010d\u016f typu p a typu n; d\u00e1le se pou\u017e\u00edv\u00e1 jako substr\u00e1t pro sv\u011bteln\u00e9 diody a ran\u00e9 r\u00e1diov\u00e9 obvody.<\/p>\n
Karbid k\u0159em\u00edku (SiC) je slitina slo\u017een\u00e1 z k\u0159em\u00edku a uhl\u00edku, kter\u00e1 se v p\u0159\u00edrod\u011b vyskytuje jako vz\u00e1cn\u00fd miner\u00e1l moissanit; od konce 19. stolet\u00ed se v\u0161ak tak\u00e9 pr\u016fmyslov\u011b vyr\u00e1b\u00ed pro pou\u017eit\u00ed jako tvrd\u00fd keramick\u00fd materi\u00e1l v produktech, jako jsou brusiva, \u017e\u00e1ruvzdorn\u00e9 v\u00fdstelky, \u0159ezn\u00e9 n\u00e1stroje a dokonce i polovodi\u010dov\u00e1 za\u0159\u00edzen\u00ed. D\u00edky t\u011bmto vlastnostem je SiC vynikaj\u00edc\u00edm z\u00e1kladn\u00edm materi\u00e1lem pro vysokonap\u011b\u0165ov\u00e1 v\u00fdkonov\u00e1 za\u0159\u00edzen\u00ed.<\/p>\n
SiC je d\u00edky \u0161ir\u0161\u00ed zak\u00e1zan\u00e9 z\u00f3n\u011b schopen odol\u00e1vat ve srovn\u00e1n\u00ed s k\u0159em\u00edkem velmi vysok\u00fdm nap\u011bt\u00edm.<\/p>\n
Spole\u010dnost Washington Mills nab\u00edz\u00ed karbid k\u0159em\u00edku CARBOREX v r\u016fzn\u00fdch chemick\u00fdch slo\u017een\u00edch a velikostech pro pou\u017eit\u00ed v odv\u011btv\u00edch brusiv, metalurgie a \u017e\u00e1ruvzdorn\u00fdch materi\u00e1l\u016f. D\u00edky sv\u00e9 odolnosti a cenov\u00e9 v\u00fdhodnosti je karbid k\u0159em\u00edku CARBOREX obl\u00edben\u00fdm brusivem v kamen\u00e1\u0159stv\u00ed; krom\u011b toho se \u0161iroce pou\u017e\u00edv\u00e1 pro brou\u0161en\u00ed, \u0159ez\u00e1n\u00ed vodn\u00edm paprskem, p\u00edskov\u00e1n\u00ed i pro \u0159adu obr\u00e1b\u011bc\u00edch proces\u016f, jako je nap\u0159\u00edklad brou\u0161en\u00ed. Jeho krystalick\u00e1 struktura nav\u00edc umo\u017e\u0148uje vytv\u00e1\u0159en\u00ed r\u016fzn\u00fdch polytip\u016f d\u00edky r\u016fzn\u00fdm uspo\u0159\u00e1d\u00e1n\u00edm atom\u016f; jeho vrstevnat\u00e1 struktura pak umo\u017e\u0148uje vznik jedine\u010dn\u00fdch polytip\u016f neboli forem!<\/p>\n
Karbid k\u0159em\u00edku je d\u00edky sv\u00e9 tvrdosti, chemick\u00e9 inertnosti, n\u00edzk\u00e9 tepeln\u00e9 rozta\u017enosti a elektrick\u00e9 vodivosti ide\u00e1ln\u00edm materi\u00e1lem pro pou\u017eit\u00ed v podm\u00ednk\u00e1ch vysok\u00fdch teplot a v aplikac\u00edch vy\u017eaduj\u00edc\u00edch odolnost proti opot\u0159eben\u00ed. Krom\u011b toho se karbid k\u0159em\u00edku vyzna\u010duje vynikaj\u00edc\u00ed trvanlivost\u00ed p\u0159i pou\u017eit\u00ed ve vysokonap\u011b\u0165ov\u00fdch aplikac\u00edch, co\u017e z n\u011bj \u010din\u00ed ide\u00e1ln\u00ed volbu pro v\u00fdkonov\u00e9 sp\u00edna\u010de.<\/p>\n
Korund, jedna z nejtvrd\u0161\u00edch zn\u00e1m\u00fdch l\u00e1tek, se vyu\u017e\u00edv\u00e1 v mnoha modern\u00edch technologi\u00edch, v\u010detn\u011b brou\u0161en\u00ed, \u0159ez\u00e1n\u00ed vodn\u00edm paprskem a p\u00edskov\u00e1n\u00ed; d\u00edky sv\u00e9 odolnosti se tak\u00e9 st\u00e1le \u010dast\u011bji pou\u017e\u00edv\u00e1 v klenotnictv\u00ed. Korund pat\u0159\u00ed spolu s karbidem boru a diamantem k t\u0159em nejtvrd\u0161\u00edm zn\u00e1m\u00fdm l\u00e1tk\u00e1m; nav\u00edc hraje kl\u00ed\u010dovou roli v r\u016fzn\u00fdch oblastech pou\u017eit\u00ed, v\u010detn\u011b brusiv, \u017e\u00e1ruvzdorn\u00fdch keramik a polovodi\u010d\u016f.<\/p>\n
Karbid k\u0159em\u00edku se vyskytuje v r\u016fzn\u00fdch polymorfn\u00edch form\u00e1ch. Alfa-karbid k\u0159em\u00edku (a-SiC) s hexagon\u00e1ln\u00ed krystalovou strukturou podobnou wurtzitu je jednou z \u010dast\u011bji se vyskytuj\u00edc\u00edch variant; dal\u0161\u00ed varianta, beta-SiC (b-SiC), m\u00e1 krystalovou strukturu typu zinkblendy. A\u010dkoli se alfa-SiC vyskytuje \u010dast\u011bji, ob\u011b formy maj\u00ed v\u00fdznamn\u00e9 vyu\u017eit\u00ed; velk\u00e9 monokrystaly lze dokonce p\u011bstovat metodou chemick\u00e9ho napa\u0159ov\u00e1n\u00ed.<\/p>\n
Karbid k\u0159em\u00edku je v\u00fdjime\u010dn\u00fd materi\u00e1l pro aplikace vy\u017eaduj\u00edc\u00ed odolnost proti opot\u0159eben\u00ed; vyzna\u010duje se ni\u017e\u0161\u00edm koeficientem t\u0159en\u00ed ne\u017e ocel \u010di jak\u00fdkoli jin\u00fd kov a odol\u00e1v\u00e1 korozi v nejr\u016fzn\u011bj\u0161\u00edch prost\u0159ed\u00edch. Karbid k\u0159em\u00edku s nitridov\u00fdm pojivem se vyzna\u010duje obzvl\u00e1\u0161t\u011b dobrou tvarovatelnost\u00ed a odol\u00e1v\u00e1 korozi i p\u0159i koncentrac\u00edch kyselin, z\u00e1sad a sol\u00ed dosahuj\u00edc\u00edch a\u017e sedmi \u0159\u00e1d\u016f.<\/p>\n
Krom\u011b toho, \u017ee se zirkoniumoxid pou\u017e\u00edv\u00e1 p\u0159i v\u00fdrob\u011b brusn\u00fdch kotou\u010d\u016f a brusn\u00e9ho pap\u00edru, najdeme ho d\u00edky jeho n\u00edzk\u00e9 tepeln\u00e9 rozta\u017enosti a vysok\u00e9 tvrdosti tak\u00e9 v \u017e\u00e1ruvzdorn\u00fdch materi\u00e1lech, keramice a dal\u0161\u00edch vysoce v\u00fdkonn\u00fdch materi\u00e1lech, jako jsou nap\u0159\u00edklad zrcadla pro astronomick\u00e9 dalekohledy.<\/p>\n
Tento materi\u00e1l je ide\u00e1ln\u00ed volbou pro prvky vysokonap\u011b\u0165ov\u00fdch obvod\u016f. D\u00edky desetkr\u00e1t vy\u0161\u0161\u00ed odolnosti proti nap\u011bt\u00ed ne\u017e m\u00e1 nitrid galia je neocenitelnou sou\u010d\u00e1st\u00ed m\u011bni\u010d\u016f v elektromobilech a sol\u00e1rn\u00edch energetick\u00fdch syst\u00e9mech. D\u00edky sv\u00e9 odolnosti proti oxidaci nav\u00edc sn\u00e1\u0161\u00ed vysok\u00e9 teploty, co\u017e z n\u011bj \u010din\u00ed ide\u00e1ln\u00ed materi\u00e1l pro v\u00fdrobu materi\u00e1l\u016f pro nep\u0159\u00edm\u00e9 vyh\u0159\u00edv\u00e1n\u00ed p\u0159i vysok\u00fdch teplot\u00e1ch v odv\u011btv\u00edch taven\u00ed ne\u017eelezn\u00fdch kov\u016f, jako jsou nap\u0159\u00edklad oblo\u017een\u00ed pec\u00ed na taven\u00ed m\u011bdi nebo oblo\u017een\u00ed elektrolytick\u00fdch van na hlin\u00edk.<\/p>\n
Karbid k\u0159em\u00edku se d\u00edky sv\u00e9 vynikaj\u00edc\u00ed tepeln\u00e9 stabilit\u011b a vysok\u00e9 teplot\u011b t\u00e1n\u00ed pou\u017e\u00edv\u00e1 jako \u017e\u00e1ruvzdorn\u00fd materi\u00e1l k zaji\u0161t\u011bn\u00ed ochrany a izolace v aplikac\u00edch s vysok\u00fdmi teplotami. Keramick\u00fd pr\u016fmysl, odv\u011btv\u00ed metalurgick\u00fdch surovin a dal\u0161\u00ed odv\u011btv\u00ed, kter\u00e1 vy\u017eaduj\u00ed mimo\u0159\u00e1dnou trvanlivost, tepelnou odolnost, chemickou inertnost nebo chemickou kompatibilitu, z jeho pou\u017eit\u00ed jako \u017e\u00e1ruvzdorn\u00e9ho materi\u00e1lu zna\u010dn\u011b t\u011b\u017e\u00ed.<\/p>\n
D\u00edky slinov\u00e1n\u00ed p\u0159i vysok\u00fdch teplot\u00e1ch lze tento materi\u00e1l mimo jin\u00e9 pou\u017e\u00edt p\u0159i v\u00fdrob\u011b \u017e\u00e1ruvzdorn\u00fdch litin, brusiv a metalurgick\u00fdch surovin \u2013 v\u010detn\u011b vlastnost\u00ed, jako je odolnost proti tepeln\u00fdm \u0161ok\u016fm a n\u00e1raz\u016fm. Nav\u00edc se vyzna\u010duje vysokou trvanlivost\u00ed a dob\u0159e odol\u00e1v\u00e1 abrazivn\u00edmu opot\u0159eben\u00ed, korozi i erozi.<\/p>\n
\u017d\u00e1ruvzdorn\u00e9 materi\u00e1ly Magnesita jsou schopny odol\u00e1vat extr\u00e9mn\u011b vysok\u00fdm teplot\u00e1m, d\u00edky \u010demu\u017e jsou ide\u00e1ln\u00ed pro pou\u017eit\u00ed v r\u016fzn\u00fdch vysokoteplotn\u00edch aplikac\u00edch, jako jsou vyzd\u00edvky a nosn\u00e9 konstrukce tavic\u00edch pec\u00ed, vany v pec\u00edch na taven\u00ed m\u011bdi, destila\u010dn\u00ed pece s pevnou n\u00e1dobou a pece na zinkov\u00fd pr\u00e1\u0161ek. D\u00edky sv\u00fdm jedine\u010dn\u00fdm vlastnostem jsou tak\u00e9 vhodn\u00e9 pro pou\u017eit\u00ed v energetice, proto\u017ee odol\u00e1vaj\u00ed extr\u00e9mn\u00edm teplot\u00e1m panuj\u00edc\u00edm v jadern\u00fdch reaktorech. Spole\u010dnost RHI Magnesita nab\u00edz\u00ed na port\u00e1lu Matmatch \u0161irok\u00fd v\u00fdb\u011br \u017e\u00e1ruvzdorn\u00fdch v\u00fdrobk\u016f vhodn\u00fdch pro r\u016fzn\u00e1 pou\u017eit\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide has long been utilized as an abrasive for grinding brittle surfaces since the 19th century. Furthermore, this hard […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-48","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/posts\/48","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/comments?post=48"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/posts\/48\/revisions"}],"predecessor-version":[{"id":49,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/posts\/48\/revisions\/49"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/media?parent=48"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/categories?post=48"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/cs\/wp-json\/wp\/v2\/tags?post=48"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}