![\"Pr\u00e1\u0161ok](\"http:\/\/siliconcarbideceramic.net\/wp-content\/uploads\/2024\/10\/Silicon-Carbide-Powder.jpg\")
<\/p>","protected":false},"excerpt":{"rendered":"Karbid krem\u00edka (SiC) je anorganick\u00e1 chemick\u00e1 zl\u00fa\u010denina pozost\u00e1vaj\u00faca z krem\u00edka a uhl\u00edka, ktor\u00e1 sa v pr\u00edrode vyskytuje ako mimoriadne vz\u00e1cny miner\u00e1l moissanit; masov\u00e1 v\u00fdroba sa v\u0161ak za\u010dala v roku 1893 v pr\u00e1\u0161kovej forme, ako aj vo forme kry\u0161t\u00e1lov na pou\u017eitie ako brusivo.<\/p>\n
\u010cierny karbid krem\u00edka je v\u010faka svojim ve\u013ek\u00fdm kry\u0161t\u00e1lom, v\u00fdnimo\u010dnej h\u00fa\u017eevnatosti, hustej \u0161trukt\u00fare a opakovan\u00e9mu v\u00fdkonu pri opakovan\u00fdch aplik\u00e1ci\u00e1ch brusivom na vysoko presn\u00e9 lapovanie a le\u0161tenie.<\/p>\n
Pr\u00e1\u0161ok karbidu krem\u00edka je mimoriadne tvrd\u00fd a odoln\u00fd vo\u010di opotrebovaniu, \u010do z neho rob\u00ed ide\u00e1lnu surovinu na v\u00fdrobu abraz\u00edvnych materi\u00e1lov, ako s\u00fa br\u00fasne kot\u00fa\u010de a rezn\u00e9 n\u00e1stroje. Okrem toho sa v\u010faka svojej vynikaj\u00facej tepelnej vodivosti a odolnosti s ob\u013eubou pou\u017e\u00edva ako pr\u00eddavn\u00e1 zlo\u017eka v procesoch v\u00fdroby elektroniky a polovodi\u010dov.<\/p>\n
SiC sa m\u00f4\u017ee vyr\u00e1ba\u0165 zahrievan\u00edm kremi\u010dit\u00e9ho piesku so zdrojmi uhl\u00edka, ako je napr\u00edklad ropn\u00fd koks, na vysok\u00e9 teploty v otvorenej \"Achesonovej\" peci, \u010d\u00edm sa z\u00edskaj\u00fa zelen\u00e9 alebo \u010dierne zrn\u00e1 karbidu krem\u00edka s men\u0161\u00edm mno\u017estvom ne\u010dist\u00f4t ako jeho menej kvalitn\u00fd n\u00e1protivok.<\/p>\n
Zelen\u00fd alebo \u010dierny pr\u00e1\u0161ok karbidu krem\u00edka sa zmie\u0161a s neoxidov\u00fdm spekan\u00edm, zn\u00e1mym ako spojivo, a vytvor\u00ed sa pasta. Pasta sa potom zhut\u0148uje a tvaruje vytl\u00e1\u010dan\u00edm (r\u00farky) alebo izostatick\u00fdm lisovan\u00edm za studena, pri ktorom sa \u010dastice vtl\u00e1\u010daj\u00fa do pevn\u00fdch foriem tlakom z viacer\u00fdch smerov, aby sa vytvorili tvary, ktor\u00e9 sa potom m\u00f4\u017eu obr\u00e1ba\u0165.<\/p>\n
Vynikaj\u00faca tepeln\u00e1 vodivos\u0165 karbidu krem\u00edka z neho rob\u00ed neocenite\u013en\u00fd materi\u00e1l v r\u00f4znych priemyseln\u00fdch odvetviach, najm\u00e4 v t\u00fdch, ktor\u00e9 sa zaoberaj\u00fa v\u00fdrobou elektroniky a polovodi\u010dov, kde je jeho schopnos\u0165 odol\u00e1va\u0165 vysok\u00fdm teplot\u00e1m bez toho, aby sa stal nestabiln\u00fdm, ve\u013ekou v\u00fdhodou.<\/p>\n
Medzi materi\u00e1ly s vysokou odolnos\u0165ou vo\u010di po\u0161kodeniu a tepeln\u00fdm \u0161okom patr\u00ed akryl. Tento v\u0161estrann\u00fd materi\u00e1l vydr\u017e\u00ed v\u00fdrazn\u00fa plastick\u00fa deform\u00e1ciu pred vznikom lomu a m\u00f4\u017ee sa pochv\u00e1li\u0165 n\u00edzkou mierou roz\u0165a\u017enosti pri teplotn\u00fdch zmen\u00e1ch.<\/p>\n
\u010cierna zrnitos\u0165 karbidu krem\u00edka je na rozdiel od diamantu mimoriadne h\u00fa\u017eevnat\u00e1 a v\u0161estrann\u00e1; mo\u017eno ju pou\u017ei\u0165 na aplik\u00e1cie, ako s\u00fa br\u00fasne kot\u00fa\u010de, br\u00fasny papier a povlakovan\u00e9 a lepen\u00e9 abraz\u00edva na tryskanie. V\u010faka svojej tvrdosti a vynikaj\u00facej chemickej a tepelnej stabilite predstavuje cenovo dostupn\u00fa alternat\u00edvu ku karbidov\u00fdm br\u00fasnym materi\u00e1lom z b\u00f3ru, ktor\u00e9 sa vyr\u00e1baj\u00fa reak\u010dn\u00fdm sp\u00e1jan\u00edm s pou\u017eit\u00edm \u010dist\u00e9ho kremi\u010dit\u00e9ho piesku a uhlia ako surov\u00edn v tehlov\u00fdch elektrick\u00fdch odporov\u00fdch peciach.<\/p>\n
SiC je jedn\u00fdm z najtvrd\u0161\u00edch syntetick\u00fdch materi\u00e1lov, z h\u013eadiska tvrdosti je na druhom mieste po diamante. T\u00e1to vlastnos\u0165 z neho rob\u00ed atrakt\u00edvny materi\u00e1l pre aplik\u00e1cie, kde je k\u013e\u00fa\u010dov\u00fd vysok\u00fd v\u00fdkon a trvanlivos\u0165, ako s\u00fa napr\u00edklad abraz\u00edvne aplik\u00e1cie.<\/p>\n
pon\u00fakame v\u00fdrobky z karbidu krem\u00edka viazan\u00e9ho reakciou aj z cementovan\u00e9ho karbidu volfr\u00e1mu navrhnut\u00e9 tak, aby sp\u013a\u0148ali \u0161pecifick\u00e9 \u017eiaruvzdorn\u00e9, chemick\u00e9 a tepeln\u00e9 vlastnosti. Reak\u010dne viazan\u00fd karbid krem\u00edka je ide\u00e1lny pre aplik\u00e1cie, kde sa mus\u00ed zoh\u013eadni\u0165 odolnos\u0165 proti opotrebovaniu alebo zlo\u017eit\u00e9 tvary; cementovan\u00fd karbid volfr\u00e1mu pon\u00faka lep\u0161ie tepeln\u00e9 a chemick\u00e9 izola\u010dn\u00e9 vlastnosti ako jeho n\u00e1protivok.<\/p>\n
\u010cierny karbid krem\u00edka je v\u010faka svojim abraz\u00edvnym vlastnostiam ob\u013e\u00faben\u00fd v automobilovom a leteckom priemysle na honovanie a lapovanie s\u00fa\u010diastok na presn\u00e9 rozmery a povrchov\u00fa \u00fapravu alebo na otrysk\u00e1vanie odoln\u00e9 vo\u010di kor\u00f3zii a opotrebovaniu. Okrem toho jeho v\u00fdnimo\u010dn\u00e1 pevnos\u0165 a trvanlivos\u0165 mu umo\u017e\u0148uj\u00fa odol\u00e1va\u0165 extr\u00e9mnym podmienkam pri zachovan\u00ed neporu\u0161enosti a v\u010faka odolnosti proti kor\u00f3zii a opotrebovaniu je zn\u00e1my ako abraz\u00edvny materi\u00e1l na tryskanie. Okrem toho jeho odolnos\u0165 proti kor\u00f3zii a opotrebovaniu pom\u00e1ha predl\u017eova\u0165 \u017eivotnos\u0165 s\u00fa\u010diastok a z\u00e1rove\u0148 zni\u017euje prestoje - plat\u00ed to najm\u00e4 pri n\u00e1strojoch, ako s\u00fa br\u00fasne kot\u00fa\u010de alebo tryskacie abraz\u00edva, ktor\u00e9 pou\u017e\u00edvaj\u00fa \u010dierne karbidov\u00e9 tryskacie abraz\u00edva alebo rezn\u00e9 n\u00e1stroje, ktor\u00e9 si vy\u017eaduj\u00fa neust\u00e1lu \u00fadr\u017ebu alebo prestoje z d\u00f4vodu povlakov odoln\u00fdch proti kor\u00f3zii\/opotrebovaniu alebo rezn\u00fdch n\u00e1strojov z tohto materi\u00e1lu.<\/p>\n
Karbid krem\u00edka je mimoriadne tvrd\u00fd a \u013eahk\u00fd keramick\u00fd materi\u00e1l s vynikaj\u00facou tepelnou stabilitou a odolnos\u0165ou proti kor\u00f3zii, v\u010faka \u010domu je vhodn\u00fd na aplik\u00e1cie s vysok\u00fdm za\u0165a\u017een\u00edm, ako s\u00fa priemyseln\u00e9 stroje a automobilov\u00e9 komponenty.<\/p>\n
Moissanit, polovodi\u010dov\u00fd materi\u00e1l so \u0161irokou p\u00e1smovou medzerou, ktor\u00fd sa v pr\u00edrode vyskytuje ako drahokam moissanit, sa masovo vyr\u00e1ba od konca 19. storo\u010dia na pou\u017eitie ako abraz\u00edvum, napr\u00edklad na br\u00fasne kot\u00fa\u010de a rezn\u00e9 n\u00e1stroje, v \u017eiaruvzdorn\u00fdch oblo\u017eeniach \u010derpadiel, raketov\u00fdch motorov a in\u00fdch strojov, preto\u017ee s\u00fa\u010diastky odoln\u00e9 vo\u010di opotrebovaniu, tuhos\u0165, odolnos\u0165 vo\u010di tepeln\u00fdm \u0161okom a pevnos\u0165 s\u00fa tie\u017e \u017eiaducimi vlastnos\u0165ami na v\u00fdrobu zrkadiel teleskopov z tohto materi\u00e1lu.<\/p>\n
Achesonova p\u00f4vodn\u00e1 met\u00f3da v\u00fdroby SiC zost\u00e1va v centre modernej v\u00fdroby na pou\u017eitie v abraz\u00edvach, metalurgii a \u017eiaruvzdorn\u00fdch materi\u00e1loch. Suroviny sa zahrievaj\u00fa pri vysok\u00fdch teplot\u00e1ch v otvorenej peci, a\u017e k\u00fdm sa nevytvor\u00ed agreg\u00e1t zeleno-\u010dierneho kry\u0161talick\u00e9ho SiC, obklopen\u00fd \u010diasto\u010dne alebo \u00faplne nekonvertovan\u00fdm oxidom kremi\u010dit\u00fdm a uhl\u00edkom vo forme ropn\u00e9ho koksu.<\/p>\n
<\/p>","protected":false},"excerpt":{"rendered":"
Silicon Carbide Powder – High Efficiency Abrasive for Industrial Use Silicon carbide (SiC) is an inorganic chemical compound composed of […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","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":[5],"tags":[],"class_list":["post-358","post","type-post","status-publish","format-standard","hentry","category-product-related"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/358","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=358"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/358\/revisions"}],"predecessor-version":[{"id":360,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/posts\/358\/revisions\/360"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/media?parent=358"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/categories?post=358"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/sk\/wp-json\/wp\/v2\/tags?post=358"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}