Silisyum Karb\u00fcr (SiC), do\u011fal olarak mozanit m\u00fccevherinde ve daha k\u00fc\u00e7\u00fck \u00f6l\u00e7\u00fcde karbonlu kondrit meteoritlerinde bulunan son derece sert bir sentetik silikon ve karbon bile\u015fi\u011fidir.<\/p>\n
Silis kumu ve kok k\u00f6m\u00fcr\u00fcn\u00fcn elektrikli bir f\u0131r\u0131nda y\u00fcksek s\u0131cakl\u0131klarda eritilmesiyle \u00fcretilen kuvars, en yayg\u0131n olan\u0131 Wurtzite'e benzer alt\u0131gen kristal yap\u0131ya sahip alfa formu olmak \u00fczere en az 70 farkl\u0131 kristal formunda bulunur.<\/p>\n
Daha yayg\u0131n olarak Karborundum olarak adland\u0131r\u0131lan silisyum karb\u00fcr, elmastan sonra ikinci s\u0131rada yer alan ola\u011fan\u00fcst\u00fc sertlik ve kimyasal diren\u00e7 \u00f6zelliklerine sahip oksit olmayan seramik bir bile\u015fiktir. Ayr\u0131ca, saf formdaki silisyum karb\u00fcr, daha g\u00fcvenilir elektrik iletkenli\u011fi ve iletkenlik i\u00e7in daha y\u00fcksek s\u0131cakl\u0131klarda oksidasyona diren\u00e7 g\u00f6sterir.<\/p>\n
SiC \u00fcretmek i\u00e7in silis kumunu bir elektrikli f\u0131r\u0131nda karbon ile \u0131s\u0131t\u0131n. \u00dcretilen ye\u015fil ila mavimsi-siyah, kristal malzeme daha sonra farkl\u0131 fiziksel \u00f6zelliklere sahip s\u0131n\u0131flara ayr\u0131labilir: \u00f6rne\u011fin metalurjik A s\u0131n\u0131f\u0131 kaba katmanlara sahipken; b s\u0131n\u0131f\u0131n\u0131n daha p\u00fcr\u00fczs\u00fcz kristalleri daha p\u00fcr\u00fczs\u00fcz yap\u0131lar olu\u015fturur.<\/p>\n
Bu \u00e7ok katmanl\u0131 yap\u0131 t\u00fcrleri kendine \u00f6zg\u00fc elektriksel, optik ve termal \u00f6zellikler sergiler. Atomik ba\u011flar\u0131, d\u00f6rt alt\u0131gen kristal olu\u015fturan d\u00fczensiz kare bir d\u00fczende d\u00f6rt karbon atomu ile ba\u011flanm\u0131\u015f d\u00f6rt silikon atomundan olu\u015fur; bu da geni\u015f bant aral\u0131kl\u0131 yar\u0131 iletken \u00f6zellikler sa\u011flar. Ekstr\u00fczyon veya so\u011fuk izostatik presleme, bu malzemeleri \u00e7ubuk ve t\u00fcp olarak kullan\u0131lmak \u00fczere \u00e7ubuk veya t\u00fcp \u015feklinde \u015fekillendirebilir.<\/p>\n
Daha yayg\u0131n olarak karborundum olarak adland\u0131r\u0131lan silisyum karb\u00fcr (SiC), geni\u015f bant aral\u0131kl\u0131 yar\u0131 iletken \u00f6zelliklere sahip, silikon ve karbondan olu\u015fan sert bir kimyasal bile\u015fiktir. Do\u011fas\u0131 gere\u011fi refrakter olan SiC, y\u00fcksek termal iletkenli\u011fi ve termal \u015foka kar\u015f\u0131 b\u00fcy\u00fck diren\u00e7 sa\u011flayan d\u00fc\u015f\u00fck termal genle\u015fme \u00f6zellikleriyle de bilinir.<\/p>\n
Kristalin SiC, tetrahedral koordinasyonda ba\u011fl\u0131 d\u00f6rt silisyum ve d\u00f6rt karbon atomu ile yak\u0131n paketlenmi\u015f bir yap\u0131da kristalle\u015fir ve 70'in \u00fczerinde polip tipine sahiptir; alfa SiC en s\u0131k 2000 degC'nin \u00fczerindeki s\u0131cakl\u0131klarda Wurtzite benzer hekzagonal kristal yap\u0131s\u0131 ile bulunur. Bu arada, elmas ve sfalerit olu\u015fumuna benzer \u00e7inkoblende kristal yap\u0131s\u0131na sahip beta modifikasyonu daha d\u00fc\u015f\u00fck s\u0131cakl\u0131klarda meydana gelir.<\/p>\n
Karborundum do\u011fada son derece nadir bulunan bir maddedir ancak uzaydaki karbon zengini meteoritlerde temel bir elementtir. \u0130lk olarak 1891 y\u0131l\u0131nda Edward Acheson taraf\u0131ndan yapay elmas \u00fcretme \u00e7al\u0131\u015fmalar\u0131n\u0131n bir par\u00e7as\u0131 olarak yapay olarak sentezlenen malzeme, 1893 y\u0131l\u0131nda Arizona'daki Canyon Diablo meteorunda do\u011fal olarak ke\u015ffedilmi\u015f ve Nobel \u00f6d\u00fcl\u00fc sahibi Henri Moissan'\u0131n ad\u0131yla moissanite olarak adland\u0131r\u0131lm\u0131\u015ft\u0131r.<\/p>\n
Silisyum karb\u00fcr, Mohs \u00f6l\u00e7e\u011finde 9 derecesi ile son derece sert bir y\u00fczeye sahiptir, bu da onu en sert oksit olmayan seramik ve genel olarak en sert malzemelerden biri yapar. A\u015f\u0131nd\u0131r\u0131c\u0131lar ve refrakterler gibi mekanik a\u015f\u0131nmay\u0131 i\u00e7eren uygulamalar i\u00e7in m\u00fckemmel bir malzeme se\u00e7imi yaparken, y\u00fcksek s\u0131cakl\u0131k ortamlar\u0131na ve termal \u015foka direnen iyi termal \u00f6zelliklere sahiptir.<\/p>\n
Silikon, karbon atomlar\u0131n\u0131n yar\u0131s\u0131n\u0131n yerini alarak silikon ve karbon aras\u0131ndaki benzer atomik yar\u0131\u00e7ap nedeniyle geli\u015fmi\u015f \u0131s\u0131 iletim \u00f6zellikleri sa\u011flar ve fonon sa\u00e7\u0131lmas\u0131n\u0131 azaltmaya yard\u0131mc\u0131 olur.<\/p>\n
Silisyum karb\u00fcr sar\u0131dan ye\u015file, mavimsi-siyah yanard\u00f6ner kristaller olarak g\u00f6r\u00fcn\u00fcr ve 2700 derece s\u0131cakl\u0131kta ayr\u0131\u015farak s\u00fcblimle\u015fir. Suda \u00e7\u00f6z\u00fcnmemesine ra\u011fmen SiC, NaOH ve KOH gibi erimi\u015f alkalilerde ve erimi\u015f demirde \u00e7\u00f6z\u00fcn\u00fcr ve Young mod\u00fcl\u00fc ve sertli\u011fi doku, istifleme hatalar\u0131, tane boyutu ve tane s\u0131n\u0131rlar\u0131n\u0131n do\u011fas\u0131 taraf\u0131ndan belirlenir.<\/p>\n
Silisyum karb\u00fcr\u00fcn geni\u015f bant aral\u0131\u011f\u0131 enerjisi, silisyumdan daha y\u00fcksek s\u0131cakl\u0131klara ve voltajlara dayanmas\u0131n\u0131 sa\u011flayarak onu h\u0131zl\u0131 ancak g\u00fcvenilir elektronik cihazlar gerektiren uygulamalar i\u00e7in uygun hale getirir. Ayr\u0131ca, bu gerilime dayanma kabiliyeti, invert\u00f6rleri tamamen ortadan kald\u0131rarak hem boyutu hem de a\u011f\u0131rl\u0131\u011f\u0131 azaltan elektrikli ara\u00e7 ak\u00fc sistemlerinde \u00e7ok de\u011ferlidir.<\/p>\n
SiC, elektronik teknolojisinin ilerlemesine katk\u0131da bulunan seramik ve yar\u0131 iletken \u00f6zelliklerinin kombinasyonu nedeniyle pop\u00fcler bir malzemedir. Ayr\u0131ca, sertli\u011fi, mukavemeti, d\u00fc\u015f\u00fck termal genle\u015fmesi ve kimyasal reaksiyon direnci de pop\u00fclerli\u011finin artmas\u0131na katk\u0131da bulunmu\u015ftur.<\/p>\n
Silisyum karb\u00fcr, saf silika kumunun elektrikli bir f\u0131r\u0131nda karbon ile \u0131s\u0131t\u0131lmas\u0131yla olu\u015fturulur ve kalite ve kullan\u0131m amac\u0131na g\u00f6re a-SiC ve b-SiC olarak bilinen hem metalurjik hem de a\u015f\u0131nd\u0131r\u0131c\u0131 kalitelerde k\u00fcl\u00e7eler olu\u015fturur. K\u00fcl\u00e7eler olu\u015fturulduktan sonra, istenen \u00f6zellikler i\u00e7in al\u00fcminyum veya nitrojen gibi ek elementlerle harmanlanmadan \u00f6nce istenen uygulamalara ba\u011fl\u0131 olarak farkl\u0131 boyut ve \u015fekillerde kesilirler.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon Carbide (SiC) is an extremely hard synthetic compound of silicon and carbon that occurs naturally as the gem moissanite […]<\/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-62","post","type-post","status-publish","format-standard","hentry","category-sic-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/62","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/comments?post=62"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/62\/revisions"}],"predecessor-version":[{"id":63,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/posts\/62\/revisions\/63"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/media?parent=62"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/categories?post=62"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideceramic.net\/tr\/wp-json\/wp\/v2\/tags?post=62"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}