Melnais sil\u012bcija karb\u012bds tiek apstr\u0101d\u0101ts atbilsto\u0161i prec\u012bz\u0101m specifik\u0101cij\u0101m. R\u016bp\u012bgi kontrol\u0113ta \u0161\u0137iro\u0161ana un da\u013ci\u0146u forma nodro\u0161ina viendab\u012bgu apdari. Sil\u012bcija karb\u012bda pulveris ir pieejams vair\u0101kos abraz\u012bvo smil\u0161u izm\u0113ros un piecu, desmit vai divdesmit piecu m\u0101rci\u0146u daudzumos. P\u0113c piepras\u012bjuma var pas\u016bt\u012bt liel\u0101kus apjomus. To pla\u0161i izmanto str\u016bklas str\u016bklas apstr\u0101dei ar augstspiediena str\u016bklu. Lasiet t\u0101l\u0101k, lai uzzin\u0101tu vair\u0101k. Varat ar\u012b uzzin\u0101t vair\u0101k par sil\u012bcija karb\u012bda pulvera \u012bpa\u0161\u012bb\u0101m un sint\u0113zi.<\/p>\n
Sil\u012bcija karb\u012bda pulveru izm\u0113ru sadal\u012bjums<\/p>\n
\u0160aj\u0101 rakst\u0101 ir aprakst\u012bts sil\u012bcija karb\u012bda pulvera izm\u0113ru sadal\u012bjums. \u0160o materi\u0101lu izgatavoja, izmantojot fr\u0113z\u0113\u0161anas metodi. Gal\u012bg\u0101 apstr\u0101d\u0101t\u0101 materi\u0101la da\u013ci\u0146u izm\u0113rs bija 37 nm. P\u0113c tam \u0161o materi\u0101lu bez spiediena sa\u0137epin\u0101ja, pievienojot oglekli un bora karb\u012bdu 2050 \u00b0C temperat\u016br\u0101. Da\u013ci\u0146u izm\u0113ru sadal\u012bjumu noteica ar transmisijas elektronu mikroskopu (TEM).<\/p>\n
SiC pulvera izm\u0113ru sadal\u012bjumu ietekm\u0113 da\u017e\u0101das apstr\u0101des metodes, tostarp krist\u0101lu aug\u0161ana un sublim\u0101cija. \u0160\u012b materi\u0101la d90 un d10 izm\u0113ri ir svar\u012bgi, jo tie nosaka aug\u0161anas saskarni, maksim\u0101lo iepakojuma bl\u012bvumu un termisko stabilit\u0101ti. Tom\u0113r sil\u012bcija karb\u012bda pulverim ir liels vid\u0113jais da\u013ci\u0146u diametrs un zems d90, un t\u0101p\u0113c ar\u012b zem\u0101ks d10.<\/p>\n
Iepriek\u0161 min\u0113tie rezult\u0101ti liecina, ka da\u017e\u0101da lieluma sil\u012bcija karb\u012bda pulveru mais\u012bjums sp\u0113j palielin\u0101t druk\u0101t\u0101s deta\u013cas bl\u012bvumu. Iepriek\u0161\u0113jos p\u0113t\u012bjumos jaukta pulvera izejviela tika sagatavota, izmantojot izm\u0113\u0123in\u0101jumus un k\u013c\u016bdas. \u0160aj\u0101 p\u0113t\u012bjum\u0101 jaukt\u0101s pulverveida izejvielas sagatavo\u0161anai tika izmantotas eksperiment\u0101l\u0101s un model\u0113\u0161anas metodes. Bimod\u0101ls pulveris tika sagatavots, sajaucot divus da\u017e\u0101da lieluma sil\u012bcija karb\u012bda pulverus. Tika izm\u0113r\u012bts \u0161o pulveru bl\u012bvums, un, izmantojot bimod\u0101lo mais\u012bjumu, tika druk\u0101tas sil\u012bcija karb\u012bda plates.<\/p>\n
Ar BET un SEM ieg\u016bto SiC pulvera izm\u0113ru sadal\u012bjumu sal\u012bdzin\u0101jums apstiprin\u0101ja, ka SSA v\u0113rt\u012bbas \u0161ajos paraugos bija pie\u0146emam\u0101s robe\u017e\u0101s. Tika konstat\u0113ts, ka abu \u013coti t\u012bro b-SiC pulveru SSA ir simetriskas 25\/75 robe\u017e\u0101s. Turkl\u0101t tie labi saskan\u0113ja ar apr\u0113\u0137in\u0101taj\u0101m SSA v\u0113rt\u012bb\u0101m: 48 m2\/g 25\/75 sast\u0101vam un 33,9 m2\/g 75\/25 sast\u0101vam.<\/p>\n
Kam\u0113r SIKA pulverim bija vienm\u0113r\u012bgs da\u013ci\u0146u izm\u0113rs, FAU paraugam bija at\u0161\u0137ir\u012bgs izm\u0113ru sadal\u012bjums. Turpret\u012b FAU pulver\u012b bija skaidri izteikts mazu, izliektu un lielu da\u013ci\u0146u modelis. P\u0113d\u0113jo bl\u012bvums bija liel\u0101ks nek\u0101 pirmajiem. \u0160\u012b bl\u012bvuma at\u0161\u0137ir\u012bba ir iepakojuma bl\u012bvuma at\u0161\u0137ir\u012bbas rezult\u0101ts. Tom\u0113r SIKA izejmateri\u0101lam tika pat\u0113r\u0113ts liel\u0101ks pulvera daudzums nek\u0101 pirmajam.<\/p>\n
Sil\u012bcija karb\u012bda pulveru izm\u0113ru sadal\u012bjumu raksturo vair\u0101kas at\u0161\u0137ir\u012bbas. SIKA pulverim ir vienm\u0113r\u012bg\u0101ka morfolo\u0123isk\u0101 p\u0101reja nek\u0101 SIKA pulverim. Tom\u0113r SIKA pulveris uzr\u0101da liel\u0101ku tendenci pretoties termiskajam \u0161okam un piel\u0101goties aug\u0161\u0113jai aug\u0161anas saskarnei. \u0160o at\u0161\u0137ir\u012bbu skaidro ar oglek\u013ca putek\u013cu aizsarga tr\u016bkumu starp s\u0113klu un izejas pulveri. Ta\u010du \u0161\u012bs at\u0161\u0137ir\u012bbas nav tikai SIKA pulvera pielieto\u0161anas rezult\u0101ts; \u0161o par\u0101d\u012bbu var apspiest nelieli karst\u0101s zonas konstrukcijas piel\u0101gojumi.<\/p>\n
Sil\u012bcija karb\u012bda pulveru \u012bpa\u0161\u012bbas<\/p>\n
Sil\u012bcija karb\u012bda pulvera \u012bpa\u0161\u012bbas nosaka to sast\u0101vs, polikrist\u0101lisk\u0101 strukt\u016bra un veido\u0161an\u0101s metode. Sil\u012bcija karb\u012bda monokrist\u0101la sast\u0101vs un ciet\u012bba ir alfa. Ir vair\u0101ki sil\u012bcija karb\u012bda veidi. Katram veidam ir at\u0161\u0137ir\u012bgas \u012bpa\u0161\u012bbas, bet visi ir uzskat\u0101mi par abraz\u012bviem materi\u0101liem. Da\u017ei sil\u012bcija karb\u012bda pulveru piem\u0113ri ir \u0161\u0101di:<\/p>\n
Materi\u0101la strukt\u016bra ir cilindriska, ar a-SiC un b-SiC sl\u0101\u0146iem \u0101rpus\u0113. \u0160is materi\u0101ls ir za\u013c\u0161 sil\u012bcija karb\u012bds vai melns sil\u012bcija karb\u012bds, un to var atrast da\u017e\u0101d\u0101s form\u0101s, s\u0101kot no pulvera l\u012bdz liet\u0146iem. Katru sil\u012bcija karb\u012bda veidu apstr\u0101d\u0101 atbilsto\u0161i t\u0101 pielietojumam, un to var sasmalcin\u0101t, lai ieg\u016btu v\u0113lam\u0101s \u012bpa\u0161\u012bbas. Pateicoties fizik\u0101lo un \u0137\u012bmisko \u012bpa\u0161\u012bbu kombin\u0101cijai, sil\u012bcija karb\u012bds ir lietder\u012bgs materi\u0101ls, ko var izmantot da\u017e\u0101dos augsttemperat\u016bras un nodilumiztur\u012bbas veidos.<\/p>\n
SiC krist\u0101li sast\u0101v no tr\u012bs da\u017e\u0101diem polimorfu veidiem. Alfa sil\u012bcija karb\u012bds veidojas augst\u0101k\u0101 temperat\u016br\u0101 nek\u0101 beta sil\u012bcija karb\u012bds, un t\u0101 krist\u0101lisk\u0101 strukt\u016bra ir se\u0161st\u016braina, l\u012bdz\u012bga virtc\u012btam. Savuk\u0101rt beta sil\u012bcija karb\u012bdam ir krist\u0101lisk\u0101ka strukt\u016bra, un tas ir l\u012bdz\u012bgs dimantam. Abi veidi ir noder\u012bgi ra\u017eo\u0161an\u0101, bet alfa sil\u012bcija karb\u012bda komerci\u0101lo pielietojumu ir maz. Beta sil\u012bcija karb\u012bdu galvenok\u0101rt izmanto katalizatoru atbalstam.<\/p>\n
Sil\u012bcija karb\u012bds ir daudzpus\u012bgs abraz\u012bvs, ko var izmantot da\u017e\u0101d\u0101s nozar\u0113s. T\u0101 ciet\u012bbas d\u0113\u013c tas ir lielisks materi\u0101ls abraz\u012bvai apstr\u0101dei. Tas var iztur\u0113t ar\u012b augstas temperat\u016bras, un to izmanto augstas klases automobi\u013cu keramikas diskos, lo\u017eu necaurlaid\u012bg\u0101s vest\u0113s un s\u016bk\u0146u v\u0101rpstu bl\u012bv\u0113jumos. Sil\u012bcija karb\u012bdam ir ar\u012b augsta siltumvad\u012btsp\u0113ja, t\u0101p\u0113c tas ir ide\u0101li piem\u0113rots izmanto\u0161anai augsttemperat\u016bras l\u016bzumos.Ar\u012b sil\u012bcija karb\u012bda cena da\u017e\u0101diem pielietojumiem ir at\u0161\u0137ir\u012bga.<\/p>\n
Za\u013cais sil\u012bcija karb\u012bds ir noder\u012bgs ar\u012b pusvad\u012bt\u0101ju ra\u017eo\u0161an\u0101. T\u0101 liel\u0101 pretest\u012bba pret spriegumu ir desmit reizes liel\u0101ka nek\u0101 parast\u0101 sil\u012bcija. Tas padara to lab\u0101ku par gallija nitr\u012bdu sist\u0113m\u0101s, kas p\u0101rsniedz 1000 V. T\u0101p\u0113c sil\u012bcija karb\u012bds ir \u013coti v\u0113rt\u012bgs elektromobi\u013cos, saules ener\u0123ijas inverteros un sensoru sist\u0113m\u0101s. Ja j\u016bs interes\u0113 jauna produkta izstr\u0101de vai jauna tirgus atra\u0161ana vecajam produktam, sil\u012bcija karb\u012bda keramika var b\u016bt ide\u0101ls risin\u0101jums, turkl\u0101t sil\u012bcija karb\u012bda cena ir l\u0113ta un laba kvalit\u0101te.<\/p>\n
XRD spektrogr\u0101fs \u013cauj p\u0113t\u012bt sil\u012bcija karb\u012bda pulveru atomu strukt\u016bras, \u013caujot r\u016bp\u012bgi apl\u016bkot parauga strukt\u016bru un sast\u0101vu. Instrumenta spektr\u0101l\u0101 iz\u0161\u0137irtsp\u0113ja ir 1 cm-1, kas \u013cauj veikt m\u0113r\u012bjumus pat zem\u0101s temperat\u016br\u0101s. Luminiscences un Ramana sign\u0101liem tiek izmantoti da\u017e\u0101di vi\u013c\u0146u garumi, t\u0101p\u0113c ir svar\u012bgi tos abus no\u0161\u0137irt. Turkl\u0101t ar \u0161o metodi var noteikt da\u017e\u0101du paraugu \u012bpa\u0161\u012bbu at\u0161\u0137ir\u012bbas.<\/p>","protected":false},"excerpt":{"rendered":"
Melnais sil\u012bcija karb\u012bds tiek apstr\u0101d\u0101ts atbilsto\u0161i prec\u012bz\u0101m specifik\u0101cij\u0101m. R\u016bp\u012bgi kontrol\u0113ta \u0161\u0137iro\u0161ana un da\u013ci\u0146u forma nodro\u0161ina viendab\u012bgu apdari. Sil\u012bcija karb\u012bda pulveris ir pieejams vair\u0101kos abraz\u012bvo smil\u0161u izm\u0113ros un piecu, desmit vai divdesmit piecu m\u0101rci\u0146u daudzumos. P\u0113c piepras\u012bjuma var pas\u016bt\u012bt liel\u0101kus apjomus. To pla\u0161i izmanto str\u016bklas str\u016bklas apstr\u0101dei ar augstspiediena str\u016bklu. Lasiet t\u0101l\u0101k, lai uzzin\u0101tu vair\u0101k. ... Las\u012bt t\u0101l\u0101k<\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-6","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/posts\/6","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/comments?post=6"}],"version-history":[{"count":4,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/posts\/6\/revisions"}],"predecessor-version":[{"id":10,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/posts\/6\/revisions\/10"}],"wp:attachment":[{"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/media?parent=6"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/categories?post=6"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/tags?post=6"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}