Kremen (SiO\u2082) je na prvi pogled zelo podoben steklu, vendar je bolj posebno to, da je navadno steklo sestavljeno iz \u0161tevilnih sestavin (kot so kremen\u010dev pesek, boraks, borova kislina, barit, barijev karbonat, apnenec, feldspar, soda itd.). Sestava, medtem ko kremen vsebuje le SiO\u2082, njegova mikrostruktura pa je preprosta mre\u017ea, sestavljena iz tetraedri\u010dnih strukturnih enot silicijevega dioksida. ker je koli\u010dina kovinskih ne\u010disto\u010d v kremenu zelo majhna, njegova lastna \u010distost pa izredno visoka, ima kremen sam zna\u010dilnosti in prednosti, ki jih drugo steklo ne more pokazati, in je znan kot \"krona\" med steklenimi materiali. Na primer, kar zadeva toplotno odpornost, kremen ne po\u010di, tudi \u010de ga takoj po rde\u010dem o\u017eigu v ognju postavimo v vodo, medtem ko navadno steklo po rde\u010dem o\u017eigu v vodi ne po\u010di, temve\u010d se raztrga takoj, ko se o\u017ege. Podrobnej\u0161e prednosti so naslednje:
1. Odpornost na visoke temperature. Temperatura to\u010dke meh\u010danja kremen\u010devega stekla je pribli\u017eno 1730 \u2103, dolgo \u010dasa se lahko uporablja pri 1150 \u2103, najvi\u0161ja temperatura pa lahko v kratkem \u010dasu dose\u017ee 1450 \u2103.<\/p>\n\n\n\n
2. Odpornost proti koroziji. Razen s fluorovodikovo kislino visoko\u010disti kremen skoraj nima kemi\u010dne reakcije z drugimi kislinami. Pri visoki temperaturi je odporen na napade \u017eveplove kisline, du\u0161ikove kisline, klorovodikove kisline, aqua regia, nevtralnih soli, ogljika in \u017evepla. Njegova odpornost proti kislinam je 30-krat ve\u010dja od odpornosti keramike in 150-krat ve\u010dja od odpornosti nerjavnega jekla, \u0161e posebej pa njegova kemijska stabilnost pri visoki temperaturi, ki ji ni primerljiva z nobenim drugim tehni\u010dnim materialom.<\/p>\n\n\n\n
3. Dobra toplotna stabilnost. Koeficient toplotnega raztezanja zelo \u010distega kremena je izjemno majhen in lahko prenese hude temperaturne spremembe. Kremen visoke \u010distosti se segreje na pribli\u017eno 1100 \u2103 in ne po\u010di v vodi z normalno temperaturo.<\/p>\n\n\n\n
4. Dobra zmogljivost prenosa svetlobe. Kremen visoke \u010distosti ima dobro prepustnost svetlobe v celotnem spektralnem pasu od ultravijoli\u010dne do infrarde\u010de svetlobe, prepustnost vidne svetlobe pa je nad 93%, zlasti v ultravijoli\u010dnem spektralnem obmo\u010dju lahko najve\u010dja prepustnost dose\u017ee ve\u010d kot 80%.<\/p>\n\n\n\n
5. Dobra elektri\u010dna izolacija. Odpornost visoko \u010distega kremena je 10 000-krat ve\u010dja od odpornosti navadnega kremen\u010devega stekla. Je odli\u010den elektri\u010dni izolacijski material in ima dobre elektri\u010dne lastnosti tudi pri visokih temperaturah.<\/p>\n\n\n\n
Zaradi teh odli\u010dnih fizikalnih in kemijskih lastnosti se kremenovi materiali visoke \u010distosti pogosto uporabljajo v sodobni elektronski tehnologiji, polprevodnikih, komunikacijah, elektri\u010dnih svetlobnih virih, son\u010dni energiji, natan\u010dnih merilnih instrumentih za nacionalno obrambo, laboratorijskih fizikalnih in kemijskih instrumentih, jedrski energiji, nanoindustriji itd. Zlasti v hitro razvijajo\u010di se industriji polprevodnikov se velikost silicijevih rezin pove\u010duje, zato proizvajalci \u010dipov pove\u010dujejo povpra\u0161evanje po razli\u010dnih sestavnih delih iz kremena. Vendar je treba opozoriti tudi na to, da je treba med uporabo zagotoviti visoko \u010distost kremen\u010devega materiala, da bi prepre\u010dili kontaminacijo med obdelavo.<\/p>","protected":false},"excerpt":{"rendered":"
Quartz (SiO\u2082) material is very similar to glass at first glance, but what is more special is that ordinary glass […]<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Quartz Glass Products Advantages","_seopress_titles_desc":"","_seopress_robots_index":"","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-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-opacity":"","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-opacity":"","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-opacity":"","overlay-gradient":""}},"ast-content-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-opacity":"","overlay-gradient":""},"tablet":{"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-opacity":"","overlay-gradient":""},"mobile":{"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-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-378","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/posts\/378","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/comments?post=378"}],"version-history":[{"count":1,"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/posts\/378\/revisions"}],"predecessor-version":[{"id":381,"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/posts\/378\/revisions\/381"}],"wp:attachment":[{"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/media?parent=378"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/categories?post=378"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exactquartz.com\/sl\/wp-json\/wp\/v2\/tags?post=378"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}