{"id":112,"date":"2024-10-21T16:33:15","date_gmt":"2024-10-21T16:33:15","guid":{"rendered":"http:\/\/siliconcarbideplate.net\/?p=112"},"modified":"2024-10-21T16:33:15","modified_gmt":"2024-10-21T16:33:15","slug":"kiselkarbid-polytyper","status":"publish","type":"post","link":"https:\/\/siliconcarbideplate.net\/sv\/silicon-carbide-polytypes\/","title":{"rendered":"Polytyper av kiselkarbid"},"content":{"rendered":"<p>Kiselkarbid finns i olika kristallina strukturer, s\u00e5 kallade polytyper. Alfa sic \u00e4r den vanligaste polytypen med hexagonal kristallstruktur liknande den som finns i wurtzit; betamodifiering med zinkblende kristallstruktur kan vara mindre vanligt f\u00f6rekommande men har fortfarande vissa kommersiella applikationer.<\/p>\n<p>Betas kubiska mikrostruktur g\u00f6r den idealisk f\u00f6r vissa applikationer och g\u00f6r sintringen enklare \u00e4n med alfa.<\/p>\n<h2>Det \u00e4r elektriskt ledande<\/h2>\n<p>Den elektriska ledningsf\u00f6rm\u00e5gan hos por\u00f6s kiselkarbid (por\u00f6s SiC) beror p\u00e5 flera variabler. Dessa inkluderar dess porositet, SiC-polytyp och fysiska tillst\u00e5nd samt eventuella andrafastillsatser som tills\u00e4tts efter sintring, vilket kan p\u00e5verka resistivitetsniv\u00e5erna avsev\u00e4rt. Sintringsprocesser spelar ocks\u00e5 en viktig roll f\u00f6r den elektriska ledningsf\u00f6rm\u00e5gan.<\/p>\n<p>Kiselkarbid upptr\u00e4der vanligtvis som alfa-kiselkarbid (a-SiC). Denna form kan s\u00e4rskiljas genom sin hexagonala kristallstruktur som liknar wurtzit och bildas vid temperaturer \u00f6ver 1700 grader Celsius. Andra polymorfer av kiselkarbid kan f\u00f6rekomma, s\u00e5som beta (b-SiC) och mullitbunden SiC; beta k\u00e4nnetecknas av en kubisk zinkblendekristallstruktur och har n\u00e5got l\u00e4gre h\u00e5rdhet \u00e4n borkarbid.<\/p>\n<p>Hexoloy SP SiC \u00e4r en sintrad, tryckl\u00f6s form av alfa-kiselkarbid som har utvecklats f\u00f6r att fungera effektivt i applikationer med glidande kontakt, t.ex. mekaniska t\u00e4tningsytor och produktsmorda lager. Materialets unika sf\u00e4riska porer fungerar som reservoarer f\u00f6r v\u00e4tska eller sm\u00f6rjmedel och bidrar till att minimera friktionen mellan komponenterna.<\/p>\n<p>Hexoloy SP SiC f\u00f6rb\u00e4ttrar inte bara prestandan hos dessa material, utan kan ocks\u00e5 ge \u00f6verl\u00e4gsen korrosionsbest\u00e4ndighet och stabilitet vid h\u00f6ga temperaturer. Tack vare den kemiska renheten och den avancerade mikrostrukturdesignen \u00e4r Hexoloy SP SiC ett idealiskt material i m\u00e5nga olika till\u00e4mpningar; s\u00e4rskilt v\u00e4l l\u00e4mpat f\u00f6r korrosionstill\u00e4mpningar i reducerande\/oxiderande milj\u00f6er eftersom det har den h\u00f6gsta kemiska best\u00e4ndighetsgraden bland industrikeramer.<\/p>","protected":false},"excerpt":{"rendered":"<p>Silicon carbide comes in various crystalline structures, known as polytypes. Alpha sic is its most prevalent polytype with hexagonal crystal structure similar to that found in wurtzite; beta modification with zinc blende crystal structure may be less frequent yet still has some commercial applications. Beta&#8217;s cubic microstructure makes it ideal for some applications and makes&hellip;&nbsp;<a href=\"https:\/\/siliconcarbideplate.net\/sv\/silicon-carbide-polytypes\/\" class=\"\" rel=\"bookmark\">L\u00e4s mer \"<span class=\"screen-reader-text\">Polytyper av kiselkarbid<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-112","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/posts\/112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/comments?post=112"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/posts\/112\/revisions"}],"predecessor-version":[{"id":113,"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/posts\/112\/revisions\/113"}],"wp:attachment":[{"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/media?parent=112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/categories?post=112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbideplate.net\/sv\/wp-json\/wp\/v2\/tags?post=112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}