Sil\u012bcija karb\u012bda pl\u0101ksne ir \u0101rk\u0101rt\u012bgi ciets un bl\u012bvs keramikas materi\u0101ls, kas nodro\u0161ina lielisku aizsardz\u012bbu pret koroziju, sk\u0101b\u0113m un augst\u0101m temperat\u016br\u0101m, k\u0101 ar\u012b stingr\u012bbu un zemu termisko izple\u0161anos, padarot to par lielisku materi\u0101lu lieliem teleskopu spogu\u013ciem.<\/p>\n
Saint-Gobain pied\u0101v\u0101 iespaid\u012bgu sil\u012bcija karb\u012bda izstr\u0101d\u0101jumu kl\u0101stu, tostarp nitr\u012bdu saist\u012bt\u0101s, reakciju saist\u012bt\u0101s un sa\u0137epin\u0101t\u0101s sil\u012bcija karb\u012bda pl\u0101ksnes. Visai \u0161ai piln\u012bb\u0101 bl\u012bv\u0113tajai keramikai piem\u012bt izcilas fizik\u0101l\u0101s un \u0137\u012bmisk\u0101s \u012bpa\u0161\u012bbas, lai to var\u0113tu izmantot ekstr\u0113mos galapat\u0113ri\u0146a gad\u012bjumos.<\/p>\n
Sil\u012bcija karb\u012bda keramikas materi\u0101lam ir pla\u0161s pielietojums, pateicoties t\u0101 izcilaj\u0101m tribolo\u0123iskaj\u0101m un korozijas \u012bpa\u0161\u012bb\u0101m, piem\u0113ram, bl\u012bv\u0113jumiem, meh\u0101niskajiem gult\u0146iem un karsto g\u0101zu vai izkaus\u0113ta met\u0101la filtriem. Turkl\u0101t lielu interesi izraisa t\u0101 iztur\u012bba pret koroziju, un t\u0101d\u0113\u013c ir veikti noz\u012bm\u012bgi p\u0113t\u012bjumi par SiC keramiku paaugstin\u0101t\u0101 temperat\u016br\u0101.<\/p>\n
Ar oks\u012bdu saist\u012bt\u0101 sil\u012bcija karb\u012bda pl\u0101ksne izce\u013cas ar izcilu iztur\u012bbu pret koroziju, par ko liecina tas, ka t\u0101 neieg\u016bst dzi\u013c\u0101 korozij\u0101 pat vid\u0113, kas satur iev\u0113rojamu s\u0101ls daudzumu (skat\u012bt 1. paraugu 7. att\u0113l\u0101). T\u0101 k\u0101 iztur\u012bbu pret koroziju liel\u0101koties nosaka, atdalot piemais\u012bjumus no korozijas testos izmantotaj\u0101m sil\u012bcija karb\u012bda izejviel\u0101m, t\u012bru un labi kontrol\u0113tu sil\u012bcija karb\u012bda izejvielu izmanto\u0161ana nodro\u0161ina prec\u012bzus veiktsp\u0113jas nov\u0113rt\u0113jumus skarb\u0101s korozijas vid\u0113s.<\/p>\n
Sil\u012bcija karb\u012bds (parasti saukts par karborundu) ir \u0137\u012bmisks savienojums, kas sast\u0101v no sil\u012bcija un oglek\u013ca. Dab\u0101 tas sastopams k\u0101 moizan\u012bta miner\u0101ls, bet 1893. gad\u0101 tika uzs\u0101kta liela m\u0113roga ra\u017eo\u0161ana, lai to izmantotu k\u0101 abraz\u012bvu un elektronisko ier\u012b\u010du komponentus, k\u0101 ar\u012b k\u0101 keramikas bru\u0146uvestes pl\u0101ksnes.<\/p>\n
Saint-Gobain ugunsiztur\u012bg\u0101 keramika sp\u0113j iztur\u0113t augstu temperat\u016bru un spiedienu, t\u0101p\u0113c t\u0101 ir piem\u0113rota kompoz\u012btmateri\u0101lu bru\u0146u sist\u0113m\u0101m, kas paredz\u0113tas aizsardz\u012bbai pret pa\u0161reiz\u0113jiem un jauniem ballistiskiem draudiem.<\/p>\n
SiC pl\u0101ksnes, kas saist\u012btas ar oks\u012bdiem, sast\u0101v no SIC graudiem, kas savienoti kop\u0101 ar noteiktiem savienojo\u0161iem komponentiem, piem\u0113ram, SiO2, lai palielin\u0101tu slodzes m\u012bkstin\u0101\u0161anas temperat\u016bru, antioksid\u0101ciju un termisko stabilit\u0101ti. T\u0101s var pla\u0161i izmantot ikdienas keramikas kr\u0101sn\u012bs, sanit\u0101r\u0101s keramikas kr\u0101sn\u012bs, domnu oder\u0113jumos un kr\u0101saino met\u0101lu kaus\u0113\u0161anas tvert\u0146u oder\u0113jumos.<\/p>\n
Sil\u012bcija karb\u012bda ciet\u012bbas r\u0101d\u012bt\u0101js p\u0113c Mosa skalas ir tuvs dimanta ciet\u012bbas r\u0101d\u012bt\u0101jam, t\u0101p\u0113c tas ir viens no ciet\u0101kajiem sint\u0113tiskajiem materi\u0101liem uz Zemes. Turkl\u0101t t\u0101 viegl\u0101, bet iztur\u012bg\u0101 konstrukcija \u013cauj iztur\u0113t liel\u0101ko da\u013cu ballistisko draudu, t\u0101p\u0113c tas ir piem\u0113rots bru\u0146\u0101m un modern\u0101m aizsardz\u012bbas sist\u0113m\u0101m.<\/p>\n
Sil\u012bcija karb\u012bda keramiku var izgatavot, izmantojot da\u017e\u0101dus ra\u017eo\u0161anas veidus: sa\u0137epin\u0101ts SiSiC ir piln\u012bb\u0101 sabiezin\u0101ts materi\u0101ls ar lielisk\u0101m meh\u0101nisk\u0101m un \u0137\u012bmisk\u0101m \u012bpa\u0161\u012bb\u0101m; reakcijas saist\u012btajai (SiC\/SiO2) keramikai ir augsta l\u016bzuma iztur\u012bba, savuk\u0101rt karsti izostatiski pres\u0113tajam SiC praktiski nav sarau\u0161an\u0101s un ir lieliskas \u012bpa\u0161\u012bbas. Saint-Gobain izmanto da\u017e\u0101das ra\u017eo\u0161anas metodes, lai ra\u017eotu t\u0101dus produktus k\u0101 Hexoloy un DuraShock, kas apvieno gan bora karb\u012bda, gan sil\u012bcija karb\u012bda stipr\u012bbas, nodro\u0161inot nep\u0101rsp\u0113jamu aizsardz\u012bbas l\u012bmeni.<\/p>\n
\u0160\u012b keramika tiek r\u016bp\u012bgi iepakota un apstr\u0101d\u0101ta, lai p\u0101rvad\u0101\u0161anas un uzglab\u0101\u0161anas laik\u0101 izvair\u012btos no boj\u0101jumiem un saglab\u0101tu t\u0101s nevainojamo st\u0101vokli. Turkl\u0101t tiek veiktas r\u016bp\u012bgas kvalit\u0101tes p\u0101rbaudes, lai garant\u0113tu atbilst\u012bbu un nodro\u0161in\u0101tu ilgsto\u0161u lieto\u0161anu.<\/p>\n
Sil\u012bcija karb\u012bda \u0101rk\u0101rt\u012bg\u0101 iztur\u012bba \u013cauj tam iztur\u0113t triecienus, vibr\u0101ciju un augstu temperat\u016bru bez boj\u0101jumiem, padarot to par lielisku materi\u0101lu, ko var izmantot t\u0101diem lielas slodzes lietojumiem k\u0101 meh\u0101niskie bl\u012bv\u0113jumi, kr\u0101sns sast\u0101vda\u013cas un nodilumpl\u0101ksnes.<\/p>\n
Rea\u0123\u0113jot saist\u012btais sil\u012bcija karb\u012bds (RB SiC) ir \u0101rk\u0101rt\u012bgi iztur\u012bgs keramikas materi\u0101ls, kas sp\u0113j iztur\u0113t augstas temperat\u016bras, koroziju un nodilumu. Lai izveidotu \u0161o vielu, izkaus\u0113tais sil\u012bcijs ir j\u0101infiltr\u0113 porain\u0101 ogl\u012b, kas iepild\u012bts vajadz\u012bgaj\u0101s form\u0101s, izmantojot infiltr\u0101cijas procesu; p\u0113c tam tas k\u013c\u016bst par \u013coti bl\u012bvu materi\u0101lu ar daudz\u0101m t\u0101d\u0101m pa\u0161\u0101m priek\u0161roc\u012bb\u0101m k\u0101 sa\u0137epin\u0101tajam sil\u012bcija karb\u012bdam.<\/p>\n
Saint-Gobain Performance Ceramics & Refractories pied\u0101v\u0101 reakcijas saist\u012bt\u0101 sil\u012bcija karb\u012bda pl\u0101ksnes (RBSiC), kuras var apstr\u0101d\u0101t un veidot da\u017e\u0101diem lietojumiem. RBSiC pl\u0101ksnes var samazin\u0101t termisko spriedzi apdedzin\u0101\u0161anas laik\u0101, nodro\u0161inot stabilit\u0101ti un vienlaikus samazinot sprieguma slodzes l\u012bmeni; kr\u0101sn\u012bs t\u0101s parasti izmanto termisk\u0101s spriedzes samazin\u0101\u0161anai, k\u0101 ar\u012b k\u0101 atbalsta sijas konstrukciju atbalsta sij\u0101m vai automobi\u013cu sist\u0113m\u0101m.<\/p>\n
Sil\u012bcija karb\u012bds ir \u013coti stabils augst\u0101 temperat\u016br\u0101 un iztur\u012bgs pret sk\u0101bes koroziju. Turkl\u0101t t\u0101 meh\u0101nisk\u0101 stresa tolerance un iztur\u012bba pret abraz\u012bviem sp\u0113kiem padara to par lielisku materi\u0101lu griez\u0113jinstrumentiem vai abraz\u012bviem materi\u0101liem.<\/p>\n
SiC un t\u0101 sakaus\u0113jumam a-SiC piem\u012bt heksagon\u0101li bl\u012bvi iepakoti tetraedri, kas veido heksagon\u0101lu bl\u012bvi iepakotu strukt\u016bru, kur\u0101 puse tetraedru vietu ir aizpild\u012btas. Abas SiC formas ir kovalentie savienojumi ar \u0161aur\u0101m joslu atstarp\u0113m, kas \u013cauj atbr\u012bvot elektronus paaugstin\u0101t\u0101 temperat\u016br\u0101, padarot \u0161o materi\u0101lu par lielisku pusvad\u012bt\u0101ju materi\u0101lu.<\/p>\n
Sinter\u0113tais sil\u012bcija karb\u012bds (SSiC) ir v\u0113lam\u0101k\u0101 izv\u0113le, ieg\u0101d\u0101joties sil\u012bcija karb\u012bdu, jo tas ir sabl\u012bv\u0113ts, izmantojot reakcijas saist\u012b\u0161anas un m\u0101la inf\u016bzijas procesus, un nodro\u0161ina iespaid\u012bgu nodilumiztur\u012bbu, k\u0101 ar\u012b augstu iztur\u012bbu. Turkl\u0101t \u0161\u012b versija ir toksikolo\u0123iski nekait\u012bga, t\u0101p\u0113c t\u0101 ir piem\u0113rota lietojumiem, kas var b\u016bt pak\u013cauti augstam nodilumam, piem\u0113ram, bl\u012bv\u0113jumiem un s\u016bk\u0146u sast\u0101vda\u013c\u0101m.<\/p>","protected":false},"excerpt":{"rendered":"
Silicon carbide plate is an extremely hard and dense ceramic material which offers great corrosion protection from acids and high temperatures, as well as rigidity and low thermal expansion, making it an excellent material choice for mirrors in large telescopes. Saint-Gobain offers an impressive variety of silicon carbide products, including nitride-bonded, reaction bonded and sintered […]<\/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":[64],"tags":[],"class_list":["post-156","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/posts\/156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/comments?post=156"}],"version-history":[{"count":1,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/posts\/156\/revisions"}],"predecessor-version":[{"id":157,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/posts\/156\/revisions\/157"}],"wp:attachment":[{"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/media?parent=156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/categories?post=156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ceramicatijolart.com\/lv\/wp-json\/wp\/v2\/tags?post=156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}