Karbid krem\u00edka sa u\u017e od 19. storo\u010dia pou\u017e\u00edva ako br\u00fasivo na br\u00fasenie krehk\u00fdch povrchov. Okrem toho sa tento tvrd\u00fd materi\u00e1l pou\u017e\u00edva aj pri v\u00fdrobe \u017eiaruvzdorn\u00fdch materi\u00e1lov, opotrebite\u013en\u00fdch dielov a vykurovac\u00edch telies, ako aj polovodi\u010dov\u00fdch zariaden\u00ed.<\/p>\n
Dopovanie hlin\u00edka, b\u00f3ru, g\u00e1lia a dus\u00edka na vytvorenie polovodi\u010dov typu p a n, ako aj ako substr\u00e1t pre sveteln\u00e9 di\u00f3dy a prv\u00e9 r\u00e1diov\u00e9 obvody.<\/p>\n
Karbid krem\u00edka (SiC) je zliatina zlo\u017een\u00e1 z krem\u00edka a uhl\u00edka, ktor\u00e1 sa v pr\u00edrode vyskytuje ako vz\u00e1cny miner\u00e1l moissanit; od konca 19. storo\u010dia sa v\u0161ak vyr\u00e1ba aj priemyselne na pou\u017eitie ako tvrd\u00fd keramick\u00fd materi\u00e1l vo v\u00fdrobkoch, ako s\u00fa brusiv\u00e1, \u017eiaruvzdorn\u00e9 oblo\u017eenia, rezn\u00e9 n\u00e1stroje a dokonca aj polovodi\u010dov\u00e9 zariadenia. V\u010faka t\u00fdmto vlastnostiam je SiC vynikaj\u00facim z\u00e1kladn\u00fdm materi\u00e1lom pre vysokonap\u00e4\u0165ov\u00e9 v\u00fdkonov\u00e9 zariadenia.<\/p>\n
SiC je v porovnan\u00ed s krem\u00edkom schopn\u00fd odol\u00e1va\u0165 ve\u013emi vysok\u00fdm nap\u00e4tiam, preto\u017ee m\u00e1 \u0161ir\u0161iu p\u00e1smov\u00fa medzeru.<\/p>\n
Spolo\u010dnos\u0165 Washington Mills pon\u00faka karbid krem\u00edka CARBOREX v r\u00f4znych chemick\u00fdch zlo\u017ek\u00e1ch a ve\u013ekostiach na pou\u017eitie v brusnom, metalurgickom a \u017eiaruvzdornom priemysle. V\u010faka svojej trvanlivosti a n\u00e1kladovej efekt\u00edvnosti je karbid krem\u00edka CARBOREX ob\u013e\u00faben\u00fdm lapid\u00e1rnym br\u00fasnym materi\u00e1lom; okrem toho sa \u0161iroko pou\u017e\u00edva na br\u00fasenie, rezanie vodn\u00fdm l\u00fa\u010dom, pieskovanie, ako aj na viacer\u00e9 obr\u00e1bacie procesy, napr\u00edklad br\u00fasenie. Okrem toho jeho kry\u0161talick\u00e1 forma umo\u017e\u0148uje vytv\u00e1ra\u0165 r\u00f4zne polytypy na z\u00e1klade v\u00e4zbovej konfigur\u00e1cie jeho at\u00f3mov; navy\u0161e jeho vrstvy umo\u017e\u0148uj\u00fa vytv\u00e1ra\u0165 jedine\u010dn\u00e9 polytypy alebo formy naz\u00fdvan\u00e9 polytypy!<\/p>\n
Karbid krem\u00edka je ide\u00e1lnym materi\u00e1lom pre vysokoteplotn\u00e9 aplik\u00e1cie a aplik\u00e1cie odoln\u00e9 vo\u010di opotrebovaniu v\u010faka svojej tvrdosti, chemickej inertnosti, n\u00edzkej tepelnej roz\u0165a\u017enosti a elektrickej vodivosti. Okrem toho karbid krem\u00edka pon\u00faka vynikaj\u00facu odolnos\u0165 pri vysokonap\u00e4\u0165ov\u00fdch aplik\u00e1ci\u00e1ch, \u010do z neho rob\u00ed ide\u00e1lnu vo\u013ebu materi\u00e1lu pre v\u00fdkonov\u00e9 sp\u00edna\u010de.<\/p>\n
Korund je jednou z najtvrd\u0161\u00edch zn\u00e1mych l\u00e1tok a mo\u017eno ho n\u00e1js\u0165 v mnoh\u00fdch modern\u00fdch technol\u00f3gi\u00e1ch vr\u00e1tane br\u00fasenia, rezania vodn\u00fdm l\u00fa\u010dom a pieskovania, pri\u010dom jeho lapid\u00e1rne pou\u017eitie je \u010doraz popul\u00e1rnej\u0161ie v\u010faka jeho odolnosti. Korund patr\u00ed popri karbide b\u00f3ru a diamante k trom najtvrd\u0161\u00edm zn\u00e1mym l\u00e1tkam; okrem toho zohr\u00e1va k\u013e\u00fa\u010dov\u00fa \u00falohu v r\u00f4znych aplik\u00e1ci\u00e1ch vr\u00e1tane br\u00fasnych materi\u00e1lov, \u017eiaruvzdornej keramiky a polovodi\u010dov.<\/p>\n
Karbid krem\u00edka sa vyskytuje v r\u00f4znych polymorfoch. Karbid krem\u00edka alfa (a-SiC) s hexagon\u00e1lnou kry\u0161t\u00e1lovou \u0161trukt\u00farou podobnou wurtzitu je jednou z naj\u010dastej\u0161ie sa vyskytuj\u00facich odr\u00f4d; \u010fal\u0161\u00ed variant, beta SiC (b-SiC), sa vyzna\u010duje kry\u0161t\u00e1lovou \u0161trukt\u00farou zinku blende. Hoci sa \u010dastej\u0161ie vyskytuje alfa SiC, obe formy poskytuj\u00fa v\u00fdznamn\u00e9 \u00fa\u017eitkov\u00e9 vlastnosti; ve\u013ek\u00e9 monokry\u0161t\u00e1ly mo\u017eno dokonca vypestova\u0165 pomocou chemick\u00e9ho naparovania.<\/p>\n
Karbid krem\u00edka je v\u00fdnimo\u010dn\u00fd materi\u00e1l na aplik\u00e1cie odoln\u00e9 proti opotrebovaniu, ktor\u00fd sa vyzna\u010duje ni\u017e\u0161\u00edm koeficientom trenia ako oce\u013e alebo in\u00fd kov a odol\u00e1va kor\u00f3zii v r\u00f4znych prostrediach. Obzvl\u00e1\u0161\u0165 dobre sa tvor\u00ed karbid krem\u00edka s nitridovou v\u00e4zbou, ktor\u00fd odol\u00e1va kor\u00f3zii a\u017e do siedmich r\u00e1dov koncentr\u00e1ci\u00ed kysel\u00edn, z\u00e1sad a sol\u00ed.<\/p>\n
Okrem toho, \u017ee sa zirk\u00f3n pou\u017e\u00edva pri v\u00fdrobe br\u00fasnych kot\u00fa\u010dov a br\u00fasneho papiera, mo\u017eno ho n\u00e1js\u0165 aj v \u017eiaruvzdorn\u00fdch materi\u00e1loch, keramike a in\u00fdch vysoko v\u00fdkonn\u00fdch materi\u00e1loch, ako je napr\u00edklad materi\u00e1l zrkadiel pre astronomick\u00e9 teleskopy, a to v\u010faka jeho n\u00edzkej tepelnej roz\u0165a\u017enosti a tvrdosti.<\/p>\n
Tento materi\u00e1l je ide\u00e1lnou vo\u013ebou pre prvky vysokonap\u00e4\u0165ov\u00fdch obvodov. V\u010faka desa\u0165n\u00e1sobne vy\u0161\u0161ej nap\u00e4\u0165ovej odolnosti ako nitrid g\u00e1lia je neocenite\u013enou s\u00fa\u010das\u0165ou meni\u010dov pre elektrick\u00e9 vozidl\u00e1 a sol\u00e1rnych syst\u00e9mov. Okrem toho jeho odolnos\u0165 vo\u010di oxid\u00e1cii mu umo\u017e\u0148uje odol\u00e1va\u0165 vysok\u00fdm teplot\u00e1m - v\u010faka tomu je ide\u00e1lnym materi\u00e1lom na v\u00fdrobu vysokoteplotn\u00fdch nepriamych ohrievac\u00edch materi\u00e1lov v priemysle tavenia ne\u017eelezn\u00fdch kovov, ako s\u00fa v\u00fdmurovky taviacich pec\u00ed na me\u010f alebo v\u00fdmurovky elektrolytick\u00fdch n\u00e1dr\u017e\u00ed na hlin\u00edk.<\/p>\n
Karbid krem\u00edka sa pou\u017e\u00edva ako \u017eiaruvzdorn\u00fd materi\u00e1l na zabezpe\u010denie ochrany a izol\u00e1cie vo vysokoteplotn\u00fdch aplik\u00e1ci\u00e1ch v\u010faka svojej vynikaj\u00facej tepelnej stabilite a teplote tavenia. Keramika, metalurgick\u00e9 suroviny a in\u00e9 odvetvia, ktor\u00e9 vy\u017eaduj\u00fa vynikaj\u00facu trvanlivos\u0165, tepeln\u00fa odolnos\u0165, chemick\u00fa inertnos\u0165 alebo chemick\u00fa kompatibilitu, maj\u00fa z jeho pou\u017eitia ako \u017eiaruvzdorn\u00e9ho materi\u00e1lu ve\u013ek\u00fd \u00fa\u017eitok.<\/p>\n
Spekanie pri vysok\u00fdch teplot\u00e1ch umo\u017e\u0148uje jeho pou\u017eitie pri v\u00fdrobe \u017eiaruvzdorn\u00fdch odlievac\u00edch materi\u00e1lov, brus\u00edv a metalurgick\u00fdch surov\u00edn - okrem in\u00e9ho vr\u00e1tane odolnosti vo\u010di tepeln\u00fdm \u0161okom a n\u00e1razom. Okrem toho jeho trvanlivos\u0165 dobre odol\u00e1va abraz\u00edvnemu opotrebovaniu, kor\u00f3zii a po\u0161kodeniu er\u00f3ziou.<\/p>\n
Magnezitov\u00e9 \u017eiaruvzdorn\u00e9 materi\u00e1ly maj\u00fa schopnos\u0165 odol\u00e1va\u0165 extr\u00e9mne vysok\u00fdm teplot\u00e1m, v\u010faka \u010domu s\u00fa ide\u00e1lne na pou\u017eitie v r\u00f4znych vysokoteplotn\u00fdch aplik\u00e1ci\u00e1ch, ako s\u00fa v\u00fdmurovky a podpery taviacich pec\u00ed, z\u00e1sobn\u00edky taviacich pec\u00ed na me\u010f, pevn\u00e9 destila\u010dn\u00e9 pece a pece na v\u00fdrobu pr\u00e1\u0161kov\u00e9ho zinku. V\u010faka svojim jedine\u010dn\u00fdm vlastnostiam s\u00fa vhodn\u00e9 aj na pou\u017eitie v energetike, preto\u017ee dok\u00e1\u017eu odol\u00e1va\u0165 vysok\u00fdm teplot\u00e1m, ktor\u00e9 sa vyskytuj\u00fa v jadrov\u00fdch reaktoroch. Spolo\u010dnos\u0165 RHI Magnesita pon\u00faka na str\u00e1nke Matmatch \u0161irok\u00fd v\u00fdber \u017eiaruvzdorn\u00fdch v\u00fdrobkov vhodn\u00fdch na r\u00f4zne pou\u017eitia.<\/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\/sk\/wp-json\/wp\/v2\/posts\/48","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/comments?post=48"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/48\/revisions"}],"predecessor-version":[{"id":49,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/48\/revisions\/49"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/media?parent=48"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/categories?post=48"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/tags?post=48"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}