Silicio karbidas (SiC) yra itin kietas sintetiniu b\u016bdu pagamintas kristalinis junginys, pla\u010diai naudojamas pramon\u0117je. SiC u\u017eima 9,5 viet\u0105 pagal Mohso skal\u0119 - pagal kietum\u0105 jis nusileid\u017eia tik deimantui.<\/p>\n
Keraminiai pluo\u0161tai yra neatsiejama pa\u017eangi\u0173 ugniai atspari\u0173 med\u017eiag\u0173 ir funkcin\u0117s keramikos dalis, kur jie suteikia papildom\u0105 atsparum\u0105 dilimui, nes yra dengiami arba dengiami, kad b\u016bt\u0173 u\u017etikrintas papildomas atsparumas dilimui.<\/p>\n
Silicio karbidas, dar vadinamas juoduoju silicio karbidu ir K-karbidu, yra neoksidin\u0117 keramin\u0117 med\u017eiaga, pasi\u017eyminti i\u0161skirtiniu tvirtumu, kietumu ir cheminiu inerti\u0161kumu. Sudarytas i\u0161 anglies atom\u0173, kovalenti\u0161kai sujungt\u0173 su silicio atomais kristalin\u0117se gardel\u0117se, silicio karbidas pasi\u017eymi polimorfizmu, pasi\u017eymin\u010diu \u012fvairiomis sud\u0117ties sekomis, d\u0117l kuri\u0173 susidaro kubin\u0117, \u0161e\u0161iakamp\u0117 ir romboedrin\u0117 kristalin\u0117 strukt\u016bra.<\/p>\n
SiC yra viena i\u0161 kie\u010diausi\u0173 med\u017eiag\u0173 - pagal Moso skal\u0119 jis \u012fvertintas 9,5 balo - nusileid\u017eia tik boro karbidui (9,5) ir deimantui (10). Jis labai atsparus dilimui, j\u012f labai sunku sulau\u017eyti ar pa\u017eeisti; be to, jis gali atlaikyti auk\u0161t\u0105 temperat\u016br\u0105, tod\u0117l tinka naudoti pramon\u0117je.<\/p>\n
Aliuminio oksidas pla\u010diai naudojamas d\u0117l kietumo, abrazyvuose d\u0117l atsparumo dilimui, ugniai atspariose med\u017eiagose ir keramikoje d\u0117l ma\u017eo \u0161iluminio pl\u0117timosi ir atsparumo \u0161liau\u017eimui, elektronikoje d\u0117l puiki\u0173 elektrini\u0173 savybi\u0173, taip pat branduoliniuose reaktoriuose d\u0117l atsparumo radiacinei \u017ealai.<\/p>\n
Komerciniais tikslais silicio karbidas gaminamas sukepinimo b\u016bdu, kai silicio ir anglies milteliai, veikiant dideliam sl\u0117giui, suspaud\u017eiami \u012f kiet\u0105 mas\u0119. Po to, kai jis apdirbamas \u012f vamzd\u017eius arba plok\u0161tes ir (arba) blokus, jis gali b\u016bti toliau apdirbamas, kad gal\u0117t\u0173 b\u016bti galutinai naudojamas pramonini\u0173 proces\u0173 \u012frangoje ir \u0161iuolaikin\u0117je lapidaryst\u0117je. D\u0117l savo patvarumo ir palyginti nebrangios kainos jis i\u0161lieka populiarus tarp \u0161iuolaikini\u0173 lapidarium\u0173.<\/p>\n
Silicio karbidas (SiC) yra itin kieta med\u017eiaga, kurios kietumas pagal Moso skal\u0119 \u012fvertintas 9 balais, pasi\u017eymi puikiomis \u0161iluminio pl\u0117timosi savyb\u0117mis, cheminiu atsparumu r\u016bg\u0161tims ir \u0161armams, atsparumu auk\u0161toms temperat\u016broms, korozijai ir \u0161iluminiams sm\u016bgiams. SiC taip pat pasi\u017eymi labai tankiomis strukt\u016bromis, tod\u0117l tai yra tankios, bet tvirtos med\u017eiagos, su kuriomis galima dirbti.<\/p>\n
Moisanitas nat\u016braliai randamas kaip retas mineralas moisanitas, ta\u010diau nuo 1893 m. jis masi\u0161kai gaminamas ir kaip abrazyviniai milteliai, ir kaip dideli pavieniai kristalai, skirti naudoti kaip brangakmeniai. Moisanitas pla\u010diai naudojamas sunkiai d\u0117vimose pramonin\u0117se srityse, pavyzd\u017eiui, \u0161lifuojant, pjaustant ir apdirbant, taip pat metalo matricos kompozituose, kur jis veikia kaip keramin\u0117 ri\u0161amoji med\u017eiaga, stiprinanti ir stabilizuojanti detales, tod\u0117l moisanitas pasirod\u0117 es\u0105s universalus komponentas, palengvinantis gamintoj\u0173 ir in\u017einieri\u0173 gyvenim\u0105.<\/p>\n
Silicio karbidas i\u0161siskiria i\u0161 kit\u0173 abrazyv\u0173 tuo, kad nesuyra veikiamas sm\u0117liavimo ar sm\u016bgi\u0173, tod\u0117l jis ypa\u010d tinka pramoninei \u0161lifavimo \u012frangai, pvz., ratams. Be to, uolien\u0173 trombavimo juvelyrini\u0173 dirbini\u0173 gamintojai labai s\u0117kmingai naudoja \u0161\u012f abrazyv\u0105, nes jo a\u0161trios kietos briaunos nuolat atidengia naujus pavir\u0161ius \u0161lifavimo ir glaistymo tikslais. \u0160iam naudojimui da\u017enai teikiama pirmenyb\u0117 juodam silicio karbidui, o ne \u017ealiam silicio karbidui, pagamintam elektrin\u0117je vidin\u0117s var\u017eos krosnyje.<\/p>\n
Silicio karbido kietumo, cheminio inerti\u0161kumo ir \u0161iluminio stabilumo derinys leid\u017eia j\u012f laikyti puikia med\u017eiaga, kuri\u0105 galima naudoti, kai reikia atsparumo dilimui ir dilimui. Jis veiksmingai atlaiko korozij\u0105, erozij\u0105 ir trinties dilim\u0105, taip pat pasi\u017eymi geru matmen\u0173 stabilumu ir be tr\u016bkum\u0173 atlaiko auk\u0161t\u0105 temperat\u016br\u0105.<\/p>\n
Kadangi korundas yra palyginti lengvas, palyginti su jo kietumu, j\u012f galima naudoti abrazyviniams darbams, nesuma\u017einant keramikos tvirtumo. Be to, korundas yra idealus abrazyvas, kuris puikiai tinka tiek \u0161lapiojo, tiek sausojo \u0161lifavimo darbams; d\u0117l \u012fvairi\u0173 gr\u016bd\u0117tumo variant\u0173 jis yra puikus \u012frankis metalo \u0161lifavimui, akmens ir marmuro pavir\u0161i\u0173 poliravimui, r\u016bd\u017ei\u0173 \u0161alinimui ir r\u016bd\u017ei\u0173 \u0161alinimui nuo metalini\u0173 komponent\u0173.<\/p>\n
Silicio karbidas d\u0117l ma\u017e\u0173 nuot\u0117kio srovi\u0173 ir var\u017eos b\u016bsenos metu puikiai tinka naudoti elektriniuose \u012frenginiuose, tod\u0117l jis yra puiki med\u017eiaga puslaidininkiniams komponentams, tokiems kaip diodai ir tranzistoriai, taip pat kitiems auk\u0161tos \u012ftampos prietaisams gaminti.<\/p>\n
Silicio karbidas paprastai nekelia pavojaus; ta\u010diau jo dulk\u0117s gali b\u016bti toksi\u0161kos, kai j\u0173 \u012fkvepiama \u0161lifuojant ar \u0161lifuojant; norint suma\u017einti poveik\u012f dirbant su milteli\u0173 pavidalo silicio karbidu, patartina d\u0117v\u0117ti tinkamas apsaugos priemones ir tinkamai v\u0117dinti darbo viet\u0105. Be to, jis yra trapus, tod\u0117l j\u012f pjaustant ar formuojant \u012frankiais reikia ypatingo atsargumo; tai ypa\u010d svarbu, kai naudojamas ma\u017eiems detaliems dirbiniams, pavyzd\u017eiui, skulpt\u016broms ar juvelyriniams dirbiniams, kurti.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide (SiC) is an extremely hard synthetically produced crystalline compound with wide industrial applications. SiC ranks 9.5 on Mohs […]<\/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-44","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/posts\/44","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/comments?post=44"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/posts\/44\/revisions"}],"predecessor-version":[{"id":45,"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/posts\/44\/revisions\/45"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/media?parent=44"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/categories?post=44"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lt\/wp-json\/wp\/v2\/tags?post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}