Sil\u012bcija karb\u012bds (SiC) ir \u0101rk\u0101rt\u012bgi ciets sint\u0113tiski ieg\u016bts krist\u0101lisks savienojums ar pla\u0161u pielietojumu r\u016bpniec\u012bb\u0101. P\u0113c Mosa miner\u0101lu ciet\u012bbas skalas SiC ie\u0146em 9,5. vietu - \u0161aj\u0101 zi\u0146\u0101 tas ir otrais p\u0113c dimanta.<\/p>\n
Keramikas \u0161\u0137iedras ir neat\u0146emama sast\u0101vda\u013ca progres\u012bvos ugunsiztur\u012bgos materi\u0101los un funkcion\u0101laj\u0101 keramik\u0101, kur t\u0101s nodro\u0161ina papildu nodilumiztur\u012bbu, izmantojot p\u0101rkl\u0101jumus vai p\u0101rkl\u0101jumus papildu nodilumiztur\u012bbai.<\/p>\n
Sil\u012bcija karb\u012bds, ko d\u0113v\u0113 ar\u012b par melno sil\u012bcija karb\u012bdu un K-karb\u012bdu, ir bezoks\u012bda keramikas materi\u0101ls ar izcilu iztur\u012bbu, ciet\u012bbu un \u0137\u012bmisko inertumu. Sil\u012bcija karb\u012bds sast\u0101v no oglek\u013ca atomiem, kas kovalenti saist\u012bti ar sil\u012bcija atomiem krist\u0101lre\u017e\u0123os, un tam piem\u012bt polimorfisms ar da\u017e\u0101d\u0101m sak\u0101rtojuma sec\u012bb\u0101m, kas veido kubisku, heksagon\u0101lu un rombveida krist\u0101lisko strukt\u016bru.<\/p>\n
SiC ir viens no ciet\u0101kajiem pieejamajiem materi\u0101liem, kas p\u0113c Mosa skalas nov\u0113rt\u0113ts ar 9,5 ball\u0113m, ierindojoties otraj\u0101 viet\u0101 aiz bora karb\u012bda (9,5) un dimanta (10). Tas nodro\u0161ina izcilu nodilumiztur\u012bbu, un to ir \u013coti gr\u016bti salauzt vai saboj\u0101t; turkl\u0101t tas sp\u0113j iztur\u0113t augstas temperat\u016bras, t\u0101p\u0113c ir piem\u0113rots r\u016bpnieciskiem lietojumiem.<\/p>\n
Alum\u012bnija oks\u012bdu pla\u0161i izmanto t\u0101 ciet\u012bbas d\u0113\u013c, abraz\u012bvos - nodilumiztur\u012bbas d\u0113\u013c, ugunsiztur\u012bgajos materi\u0101los un keramik\u0101 - zemas termisk\u0101s izple\u0161an\u0101s un iztur\u012bbas pret sl\u012bd\u0113\u0161anu d\u0113\u013c, elektronik\u0101 - izcilu elektrisko \u012bpa\u0161\u012bbu d\u0113\u013c, k\u0101 ar\u012b kodolreaktoros - iztur\u012bbas pret radi\u0101cijas boj\u0101jumiem d\u0113\u013c.<\/p>\n
Komerci\u0101li sil\u012bcija karb\u012bdu ra\u017eo, izmantojot sa\u0137epin\u0101\u0161anu, kad sil\u012bcija pulveri un oglekli saspie\u017e kop\u0101 zem liela spiediena, veidojot cietu masu. P\u0113c tam, kad tas ir apstr\u0101d\u0101ts, veidojot caurules vai pl\u0101ksnes\/blokus, to var apstr\u0101d\u0101t t\u0101l\u0101k, lai to gal\u012bgi izmantotu r\u016bpnieciskaj\u0101s tehnolo\u0123iskaj\u0101s iek\u0101rt\u0101s, k\u0101 ar\u012b modernaj\u0101 lapid\u0101rij\u0101. Pateicoties t\u0101 iztur\u012bbai un sal\u012bdzino\u0161i l\u0113tajai cenai, tas joproj\u0101m ir popul\u0101ra izv\u0113le m\u016bsdienu lapid\u0101ru vid\u016b.<\/p>\n
Sil\u012bcija karb\u012bds (SiC) ir \u0101rk\u0101rt\u012bgi ciets materi\u0101ls, kura ciet\u012bba p\u0113c Mosa skalas ir 9, un tam piem\u012bt izcilas termisk\u0101s izple\u0161an\u0101s \u012bpa\u0161\u012bbas, \u0137\u012bmisk\u0101 iztur\u012bba pret sk\u0101b\u0113m un s\u0101rmiem, augsta temperat\u016bras tolerance, k\u0101 ar\u012b iztur\u012bba pret koroziju un termisko triecienu. SiC var lepoties ar\u012b ar \u013coti bl\u012bvu strukt\u016bru, kas padara to par bl\u012bvu, bet iztur\u012bgu materi\u0101lu, ar ko str\u0101d\u0101t.<\/p>\n
Moisan\u012bts dab\u0101 sastopams k\u0101 retais miner\u0101ls moisan\u012bts, ta\u010du kop\u0161 1893. gada to masveid\u0101 ra\u017eo gan abraz\u012bv\u0101 pulvera veid\u0101, gan k\u0101 lielus atsevi\u0161\u0137us krist\u0101lus, ko izmanto k\u0101 d\u0101rgakme\u0146us. Moisan\u012bts tiek pla\u0161i izmantots t\u0101dos iztur\u012bgos r\u016bpnieciskos lietojumos k\u0101 sl\u012bp\u0113\u0161ana, grie\u0161ana un meh\u0101nisk\u0101 apstr\u0101de, k\u0101 ar\u012b met\u0101la matricas kompoz\u012btmateri\u0101los, kur tas darbojas k\u0101 keramikas saistviela deta\u013cu stiprin\u0101\u0161anai un stabiliz\u0113\u0161anai, un ir pier\u0101d\u012bjis sevi k\u0101 univers\u0101lu sast\u0101vda\u013cu, kas atvieglo dz\u012bvi ra\u017eot\u0101jiem un in\u017eenieriem.<\/p>\n
Silicija karb\u012bds at\u0161\u0137iras no citiem abraz\u012bviem materi\u0101liem ar to, ka tas nesadal\u0101s, ja tiek pak\u013cauts str\u016bklas vai trieciena iedarb\u012bbai, t\u0101p\u0113c tas ir \u012bpa\u0161i piem\u0113rots r\u016bpniecisk\u0101m sl\u012bp\u0113\u0161anas iek\u0101rt\u0101m, piem\u0113ram, rite\u0146iem. Turkl\u0101t rotaslietu ra\u017eot\u0101ji ar lieliem pan\u0101kumiem izmanto \u0161o abraz\u012bvu, jo t\u0101 as\u0101s ciet\u0101s malas nep\u0101rtraukti atkl\u0101j jaunas virsmas sl\u012bp\u0113\u0161anai un gludin\u0101\u0161anai. \u0160im nol\u016bkam bie\u017ei vien priek\u0161roka tiek dota melnajam sil\u012bcija karb\u012bdam, nevis za\u013cajam sil\u012bcija karb\u012bdam, kas ra\u017eots elektrisk\u0101s iek\u0161\u0113j\u0101s pretest\u012bbas kr\u0101sn\u012b.<\/p>\n
Sil\u012bcija karb\u012bda ciet\u012bbas, \u0137\u012bmisk\u0101s inertuma un termisk\u0101s stabilit\u0101tes kombin\u0101cija padara to par lielisku materi\u0101lu, kas piem\u0113rots lietojumiem, kuros nepiecie\u0161ama iztur\u012bba pret nodilumu un abraziju. Tas efekt\u012bvi iztur koroziju, eroziju un berzes nodilumu, k\u0101 ar\u012b izce\u013cas ar labu izm\u0113ru stabilit\u0101ti un bez boj\u0101jumiem iztur augstu temperat\u016bru.<\/p>\n
T\u0101 k\u0101 korunds ir sal\u012bdzino\u0161i viegls, \u0146emot v\u0113r\u0101 t\u0101 ciet\u012bbu, to var izmantot abraz\u012bviem materi\u0101liem, neapdraudot keramikas iztur\u012bbu. Turkl\u0101t korunds ir ide\u0101ls abraz\u012bvs, kas labi darbojas gan mitr\u0101, gan saus\u0101 sl\u012bp\u0113\u0161anas proces\u0101; ar da\u017e\u0101d\u0101m smil\u0161u graudain\u012bbas iesp\u0113j\u0101m tas ir lielisks instruments met\u0101la virsmu att\u012br\u012b\u0161anai no r\u016bsas, akmens un marmora virsmu pul\u0113\u0161anai, r\u016bsas no\u0146em\u0161anai un met\u0101la deta\u013cu att\u012br\u012b\u0161anai no r\u016bsas.<\/p>\n
Sil\u012bcija karb\u012bds ir labi piem\u0113rots elektrotehniskajiem lietojumiem, jo tam ir zema nopl\u016bdes str\u0101va un pretest\u012bba iesl\u0113gt\u0101 st\u0101vokl\u012b, t\u0101p\u0113c tas ir lielisks materi\u0101ls pusvad\u012bt\u0101ju komponentu, piem\u0113ram, diodu un tranzistoru, k\u0101 ar\u012b citu augstsprieguma ier\u012b\u010du ra\u017eo\u0161anai.<\/p>\n
Darbs ar sil\u012bcija karb\u012bdu parasti nav b\u012bstams, tom\u0113r t\u0101 putek\u013ci var b\u016bt toksiski, ja tos ieelpo sl\u012bp\u0113\u0161anas vai sl\u012bp\u0113\u0161anas proces\u0101; lai samazin\u0101tu iedarb\u012bbu, str\u0101d\u0101jot ar pulverveida sil\u012bcija karb\u012bdu, ir ieteicams lietot atbilsto\u0161us aizsardz\u012bbas l\u012bdzek\u013cus un pareizi v\u0113din\u0101t darba telpu. T\u0101 k\u0101 tas ir ar\u012b trausls, ir nepiecie\u0161ama \u012bpa\u0161a piesardz\u012bba, grie\u017eot vai veidojot to ar instrumentiem; \u012bpa\u0161i svar\u012bgi, ja to izmanto, lai rad\u012btu mazus detaliz\u0113tus izstr\u0101d\u0101jumus, piem\u0113ram, skulpt\u016bras vai rotaslietas.<\/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\/lv\/wp-json\/wp\/v2\/posts\/44","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=44"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/44\/revisions"}],"predecessor-version":[{"id":45,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/posts\/44\/revisions\/45"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/media?parent=44"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/categories?post=44"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/lv\/wp-json\/wp\/v2\/tags?post=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}