Sil\u012bcija karb\u012bda pulveris ir \u013coti iztur\u012bgs abraz\u012bvs un ugunsiztur\u012bgs materi\u0101ls, ko izmanto augstas temperat\u016bras elektronisko ier\u012b\u010du ra\u017eo\u0161an\u0101.<\/p>\n
Ra\u017eo\u0161ana ietver sil\u012bcija smil\u0161u kars\u0113\u0161anu ar oglek\u013ca avotiem, piem\u0113ram, naftas koksu, elektrisk\u0101 loka kr\u0101sn\u012b, lai veidotos gan melni, gan za\u013ci sil\u012bcija karb\u012bdi; melnajam sil\u012bcija dioks\u012bdam ir dzelzs piemais\u012bjumi, kas rada tum\u0161\u0101ku nokr\u0101su t\u0101 p\u0101rkl\u0101jum\u0101.<\/p>\n
Sil\u012bcija karb\u012bds (SiC) ir r\u016bpniecisks miner\u0101ls, kas sast\u0101v no sil\u012bcija un oglek\u013ca un ko pla\u0161i izmanto r\u016bpniec\u012bb\u0101 k\u0101 abraz\u012bvu materi\u0101lu - s\u0101kot no smil\u0161pap\u012bra un sl\u012bp\u0113\u0161anas rite\u0146iem l\u012bdz r\u016bpniecisko kr\u0101\u0161\u0146u oder\u0113jumam un lo\u017eu necaurlaid\u012bg\u0101m vestu keramikas pl\u0101ksn\u0113m, k\u0101 ar\u012b pusvad\u012bt\u0101ju substr\u0101tiem gaismas diod\u0113m (LED). SiC sastopams ar\u012b dab\u0101 k\u0101 moisan\u012bta miner\u0101ls. SiC dab\u0101 sastopams ar\u012b k\u0101 moisan\u012bta miner\u0101ls. SiC dab\u0101 sastopams ar\u012b moisan\u012bta veid\u0101. SiC ir daudz pielietojumu, tostarp to izmanto k\u0101 ugunsiztur\u012bgu oder\u0113jumu r\u016bpnieciskaj\u0101m kr\u0101sn\u012bm, k\u0101 ar\u012b k\u0101 keramikas pl\u0101ksnes, ko izmanto gaismas diod\u0113m ar lo\u017eu necaurlaid\u012bg\u0101m vest\u0113m - tas pat dab\u0101 sastopams k\u0101 moisan\u012bta miner\u0101ls.<\/p>\n
Alum\u012bnijs izce\u013cas ar izcilu iztur\u012bbu pret nodilumu, iztur temperat\u016bru l\u012bdz pat 1400 gr\u0101diem p\u0113c C, b\u016btiski nepasliktinot iztur\u012bbu. Turkl\u0101t tas ir iztur\u012bgs pret koroziju pret liel\u0101ko da\u013cu neorganisko sk\u0101bju, s\u0101\u013cu un s\u0101rmu; tom\u0113r noteiktos apst\u0101k\u013cos, piem\u0113ram, saskar\u0113 ar sk\u0101biem fluor\u012bdiem vai fluor\u016bde\u0146ra\u017esk\u0101bi, tas var korod\u0113t.<\/p>\n
SiC ir elektriski izol\u0113jo\u0161s materi\u0101ls ar augstu stiepes iztur\u012bbu un zemu \u012bpatn\u0113jo svaru, kam piem\u012bt gan \u0137\u012bmiski stabilas, gan elektriski izol\u0113jo\u0161as \u012bpa\u0161\u012bbas, nodro\u0161inot labu \u0137\u012bmisko stabilit\u0101ti, k\u0101 ar\u012b nemagn\u0113tiskas \u012bpa\u0161\u012bbas. Tas k\u016bst 2080 gr\u0101du temperat\u016br\u0101. SiC cie\u0161\u0101 strukt\u016bra nodro\u0161ina tetraedrisko koordin\u0101ciju starp sil\u012bcija un oglek\u013ca atomiem, kas nodro\u0161ina augstu stipr\u012bbas un svara attiec\u012bbu un siltumvad\u012btsp\u0113jas \u012bpa\u0161\u012bbas.<\/p>\n
Sil\u012bcija karb\u012bda pulveri var izgatavot, lai sasniegtu da\u017e\u0101dus t\u012br\u012bbas l\u012bme\u0146us, krist\u0101lisko strukt\u016bru un da\u013ci\u0146u izm\u0113rus. Tos var ra\u017eot, izmantojot da\u017e\u0101dus procesus - karbotermisko reduc\u0113\u0161anu A\u010desona proces\u0101 vai polim\u0113ru konversiju, k\u0101 ar\u012b augsttemperat\u016bras g\u0101zes f\u0101zes \u0137\u012bmisk\u0101s reakcijas - ar da\u017e\u0101d\u0101m metod\u0113m. P\u0113c to sagatavo\u0161anas \u0161os pulverus var izmantot keramikas izstr\u0101d\u0101jumu ra\u017eo\u0161an\u0101, piem\u0113ram, ugunsiztur\u012bgu formu r\u016bpniecisk\u0101m kr\u0101sn\u012bm vai elektroizol\u0101cijas elementu ra\u017eo\u0161anai elektronikas ier\u012bc\u0113m, piem\u0113ram, mikroprocesoriem.<\/p>\n
Sil\u012bcija karb\u012bda pulveri var izmantot daudzos lietojumos. Sil\u012bcija karb\u012bds ir \u013coti iztur\u012bgs materi\u0101ls ar izcilu siltumvad\u012btsp\u0113ju un \u0137\u012bmisko notur\u012bbu, t\u0101p\u0113c tas sp\u0113j iztur\u0113t ekstr\u0113mas temperat\u016bras, s\u0101kot no izkaus\u0113ta stikla l\u012bdz pat 1 400 gr\u0101diem p\u0113c Celsija (2 552 gr\u0101diem p\u0113c F). Sil\u012bcija karb\u012bds bie\u017ei sastopams ugunsiztur\u012bgo materi\u0101lu, piem\u0113ram, keramikas, stikla un kr\u0101\u0161\u0146u kr\u0101sns sieni\u0146u, sast\u0101v\u0101, un pat sl\u012bpma\u0161\u012bnas un smil\u0161pap\u012brs tiek ra\u017eots, izmantojot t\u0101 piedevas. Turkl\u0101t sil\u012bcija karb\u012bds ir neat\u0146emams materi\u0101ls augsttemperat\u016bras pusvad\u012bt\u0101ju un elektronikas izstr\u0101d\u0101jumos.<\/p>\n
Ogleklis ir sastopams ar\u012b t\u0101dos kompoz\u012btmateri\u0101los k\u0101 ar oglek\u013ca \u0161\u0137iedru pastiprin\u0101ts sil\u012bcija karb\u012bds (CFRC), ko parasti izmanto automobi\u013cu bremz\u0113s un lo\u017eu necaur\u0161aujam\u0101s vest\u0113s, jo tas ir \u013coti iztur\u012bgs stiepes stiepes iztur\u012bbas zi\u0146\u0101 un sp\u0113j iztur\u0113t liela \u0101truma triecienus.<\/p>\n
Sinter\u0113to sil\u012bcija dioks\u012bdu bie\u017ei ra\u017eo, izmantojot augstspiediena sa\u0137epin\u0101\u0161anu temperat\u016br\u0101 l\u012bdz 11 000 gr\u0101du temperat\u016br\u0101 (1 815 gr\u0101diem p\u0113c Celsija). Galaproduktam ir \u0101rk\u0101rt\u012bgi bl\u012bva strukt\u016bra, ko veido \u010detri sil\u012bcija un \u010detri oglek\u013ca atomi, kas saist\u012bti kop\u0101 tetraedrisk\u0101 izk\u0101rtojum\u0101, nemagn\u0113tiskas \u012bpa\u0161\u012bbas, un tas ir iztur\u012bgs pret liel\u0101ko da\u013cu \u0137\u012bmisko vielu, tostarp alif\u0101tiskajiem og\u013c\u016bde\u0146ra\u017eiem, s\u0101rmiem, organiskaj\u0101m sk\u0101b\u0113m un izkaus\u0113tiem s\u0101\u013ciem; tom\u0113r tas nav iztur\u012bgs pret sp\u0113c\u012bgiem oksid\u0113t\u0101jiem, piem\u0113ram, fluor\u016bde\u0146ra\u017esk\u0101bi un k\u0101lija fluor\u012bdu.<\/p>\n
Sil\u012bcija karb\u012bds ir \u0101rk\u0101rt\u012bgi ciets ugunsiztur\u012bgs materi\u0101ls, ko izmanto, piem\u0113ram, sl\u012bp\u0113\u0161anas rite\u0146os, asme\u0146os, griez\u0113jinstrumentos, smil\u0161u str\u016bklas, \u016bdens str\u016bklas griez\u0113jos un keramik\u0101. Turkl\u0101t tas ir neat\u0146emama sast\u0101vda\u013ca augstas temperat\u016bras kr\u0101sn\u012bs, ko izmanto stikla un keramikas izstr\u0101d\u0101jumu apdedzin\u0101\u0161anai augst\u0101 temperat\u016br\u0101. Pieejami da\u017e\u0101da lieluma da\u013ci\u0146as, kas piem\u0113rotas konkr\u0113tiem lietojumiem, k\u0101 ar\u012b meln\u0101 vai balt\u0101 kr\u0101s\u0101 - vispopul\u0101r\u0101k\u0101 ir pirm\u0101 (virtc\u012bta krist\u0101lisk\u0101 strukt\u016bra) un otr\u0101 (cinka blende).<\/p>\n
A-SiC pulverim ir heksagon\u0101la krist\u0101lisk\u0101 strukt\u016bra un Mosa ciet\u012bbas pak\u0101pe 7. Tas var iztur\u0113t ekstr\u0113mus apst\u0101k\u013cus ar augstu ku\u0161anas temperat\u016bru un sp\u0113c\u012bgu siltumvad\u012btsp\u0113ju, un tam nav toksicit\u0101tes probl\u0113mu vai \u016bden\u012b vai alkohol\u0101 ne\u0161\u0137\u012bsto\u0161u \u012bpa\u0161\u012bbu. Turkl\u0101t t\u0101 iztur\u012bba pret organiskaj\u0101m sk\u0101b\u0113m, s\u0101rmiem, s\u0101\u013ciem un sk\u0101bes fluor\u012bdiem padara to piem\u0113rotu daudziem pielietojumiem r\u016bpniec\u012bb\u0101 un in\u017eeniertehniskajos lietojumos.<\/p>\n
Uzlabotiem lietojumiem ir nepiecie\u0161ams, lai, izmantojot Lely metodi, ieg\u016btu liel\u0101kus b-SiC monokrist\u0101lus, kurus p\u0113c tam var sagriezt d\u0101rgakme\u0146os, kas paz\u012bstami k\u0101 sint\u0113tiskais moisan\u012bts. SiC var ar\u012b savienot kop\u0101, izmantojot sve\u0137us vai polim\u0113rus, \u0161\u0137iedras, ko izmanto met\u0101lu un citu materi\u0101lu pastiprin\u0101\u0161anai.<\/p>\n
Izgudrojums attiecas uz b-SiC pulveru ra\u017eo\u0161anas procesu, sajaucot Si avotu, kas sast\u0101v no Si un C, ar oglek\u013ca p\u0101rpalikumu, uzkars\u0113jot kompoz\u012bciju un p\u0113c tam to filtr\u0113jot, mazg\u0101jot un \u017e\u0101v\u0113jot. Kad tas ir pabeigts, \u0161os b-SiC pulverus var viegli pulveriz\u0113t, izmantojot turpm\u0101kos procesus, piem\u0113ram, filtr\u0113\u0161anas mazg\u0101\u0161anas \u017e\u0101v\u0113\u0161anu.<\/p>\n
Sil\u012bcija karb\u012bds ir viena no pasaul\u0113 ciet\u0101kaj\u0101m viel\u0101m, ciet\u012bbas zi\u0146\u0101 konkur\u0113jot ar dimantu un bora karb\u012bdu. Silicija karb\u012bdu izmanto lietojumos, kuros nepiecie\u0161amas termiskas un meh\u0101niskas \u012bpa\u0161\u012bbas, piem\u0113ram, nodilumiztur\u012bgos materi\u0101los, ugunsiztur\u012bgajos materi\u0101los, keramik\u0101, pusvad\u012bt\u0101ju un pusvad\u012bt\u0101ju abraz\u012bvos materi\u0101los un nodilumiztur\u012bgos lietojumos; nodilumiztur\u012bgos p\u0101rkl\u0101jumos; termisk\u0101 trieciena iztur\u012bb\u0101; zem\u0101 termisk\u0101s izple\u0161an\u0101s \u0101trum\u0101 un augst\u0101 elektrovad\u012btsp\u0113j\u0101, t\u0101p\u0113c sil\u012bcija karb\u012bds nodro\u0161ina izcilas stipr\u012bbas, iztur\u012bbas un elektrovad\u012btsp\u0113jas \u012bpa\u0161\u012bbas, kas padara to par daudzpus\u012bgu materi\u0101lu izv\u0113li.<\/p>\n
Kosmisk\u0101s avi\u0101cijas un kosmosa r\u016bpniec\u012bba liel\u0101 m\u0113r\u0101 pa\u013caujas uz SiC pulvera komponentiem, kas iztur ekstrem\u0101lu karstumu un spiedienu, tostarp brem\u017eu sist\u0113m\u0101m, ko izmanto automobi\u013cos, lai uzlabotu veiktsp\u0113ju, vienlaikus samazinot rotoru un trumu\u013cu nodilumu. Savuk\u0101rt pusvad\u012bt\u0101ju r\u016bpniec\u012bb\u0101 to izmanto pl\u0101k\u0161\u0146u apstr\u0101des iek\u0101rt\u0101s, lai efekt\u012bv\u0101k p\u0101rvald\u012btu karstumu, k\u0101 ar\u012b lo\u017eu necaurlaid\u012bgo vestu keramikas pl\u0101ksn\u012bt\u0113s, kas aizsarg\u0101 karav\u012brus no liela \u0101truma triecieniem.<\/p>\n
Melno sil\u012bcija karb\u012bdu ra\u017eo elektrisk\u0101 pretest\u012bbas kr\u0101sn\u012b augst\u0101 temperat\u016br\u0101, k\u0101 izejvielas izmantojot kvarca smiltis un naftas koksu. T\u0101 vid\u0113j\u0101 ciet\u012bba ir starp kaus\u0113tu alum\u012bnija oks\u012bdu un sint\u0113tisko dimantu, un to var izmantot k\u0101 abraz\u012bvu materi\u0101lu, apstr\u0101d\u0101jot zemas stiepes iztur\u012bbas materi\u0101lus, piem\u0113ram, \u010dugunu, kr\u0101sainos met\u0101lus, ie\u017eus, \u0101du un gumiju. Turkl\u0101t melno sil\u012bcija karb\u012bdu bie\u017ei izmanto ugunsiztur\u012bgo materi\u0101lu un metalur\u0123ijas piedevu ra\u017eo\u0161an\u0101.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide powder is an extremely durable abrasive and refractory material used in high temperature electronic device production. Production involves […]<\/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":"","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":[5],"tags":[],"class_list":["post-84","post","type-post","status-publish","format-standard","hentry","category-product-related"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/84","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/comments?post=84"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/84\/revisions"}],"predecessor-version":[{"id":85,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/84\/revisions\/85"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/media?parent=84"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/categories?post=84"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/tags?post=84"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}