Sil\u012bcija karb\u012bds, ko bie\u017e\u0101k d\u0113v\u0113 par karborundu, ir ciets k\u0101 dimants un \u013coti iztur\u012bgs pret nodilumu. Turkl\u0101t t\u0101 keramisk\u0101s \u012bpa\u0161\u012bbas padara to piem\u0113rotu augstas temperat\u016bras un sprieguma vid\u0113m.<\/p>\n
Lely procesa rezult\u0101t\u0101 tiek ieg\u016bts pulveris, ko var sagriezt moisan\u012bta d\u0101rgakme\u0146os izmanto\u0161anai k\u0101 d\u0101rgakme\u0146us, bet ra\u017eot\u0101ji to izmanto ar\u012b abraz\u012bvu priek\u0161metu un izstr\u0101d\u0101jumu ra\u017eo\u0161an\u0101, kam nepiecie\u0161ama ciet\u012bba.<\/p>\n
Sil\u012bcija karb\u012bds (SiC), paz\u012bstams ar\u012b k\u0101 karborunds, ir \u0101rk\u0101rt\u012bgi ciets sil\u012bcija un oglek\u013ca savienojums, kas dab\u0101 veidojas k\u0101 miner\u0101ls moizan\u012bts un kop\u0161 19. gadsimta beig\u0101m masveid\u0101 tiek ra\u017eots k\u0101 abraz\u012bvs. Savienojot SiC ciet\u0101 keramik\u0101 vai dop\u0113jot to ar sl\u0101pekli, fosforu, beriliju vai alum\u012bniju, var veidot n- vai p-tipa pusvad\u012bt\u0101jus.<\/p>\n
R\u016bpniecisko SiC parasti ra\u017eo Achesona proces\u0101, sil\u012bcija smiltis kars\u0113jot atkl\u0101t\u0101 kr\u0101sn\u012b augst\u0101 temperat\u016br\u0101 ar oglek\u013ca avotiem, piem\u0113ram, naftas koksu, un atkar\u012bb\u0101 no t\u012br\u012bbas pak\u0101pes ieg\u016bst za\u013cas vai melnas kr\u0101sas graudus.<\/p>\n
SiC ir paz\u012bstams ar savu izcilo siltumvad\u012btsp\u0113ju un iztur\u012bbu pret koroziju. Ar zemu termisk\u0101s izple\u0161an\u0101s koeficientu, augstu stipr\u012bbas\/ciet\u012bbas attiec\u012bbu, \u0137\u012bmisko stabilit\u0101ti un vieglu apstr\u0101d\u0101jam\u012bbu tas kalpo k\u0101 galven\u0101 izejviela daudz\u0101s r\u016bpniec\u012bbas nozar\u0113s, piem\u0113ram, augstas kvalit\u0101tes ugunsiztur\u012bgo materi\u0101lu\/abraz\u012bvu\/keramikas ra\u017eo\u0161an\u0101 [16].<\/p>\n
Sil\u012bcija karb\u012bds (SiC) ir tehnisks keramikas materi\u0101ls ar unik\u0101l\u0101m \u012bpa\u0161\u012bb\u0101m, tostarp \u0137\u012bmisko inertumu vis\u0101s temperat\u016br\u0101s, iztur\u012bbu pret termiskiem triecieniem un augstu sa\u0137epin\u0101m\u012bbu. SiC izmanto da\u017e\u0101d\u0101s tehnisk\u0101s keramikas jom\u0101s, tostarp kr\u0101sns m\u0113be\u013cu un \u0161\u0137idrumu apstr\u0101des iek\u0101rtu, k\u0101 ar\u012b gult\u0146u un nodilsto\u0161o da\u013cu ra\u017eo\u0161an\u0101. SiC izmanto ar\u012b d\u012bze\u013cdegvielas da\u013ci\u0146u filtros un ballistiskaj\u0101 aizsardz\u012bb\u0101. Uz\u0146\u0113mums Washington Mills pied\u0101v\u0101 drupin\u0101\u0161anas, mal\u0161anas un klasific\u0113\u0161anas iek\u0101rtas, kas sp\u0113j sara\u017eot ANSI, FEPA un JIS standartiem atbilsto\u0161as izejvielas.<\/p>\n
SiC pulveri var at\u0161\u0137irties p\u0113c graudu lieluma atkar\u012bb\u0101 no to s\u0101kotn\u0113j\u0101 st\u0101vok\u013ca un oglek\u013ca avota. Popul\u0101rs SiC sint\u0113zes sagatavo\u0161anas process ir oglek\u013ca termiski termisk\u0101 reduc\u0113\u0161ana; tas ietver mais\u012bjuma, kas satur vienu molu SiO2, kura daudzums ir maz\u0101ks par 200 mech, reakciju ar 1,5-3 moliem oglek\u013ca avota; sk\u0101bes izskalo\u0161ana, kars\u0113\u0161ana un ieg\u016bt\u0101 \u0161\u0137\u012bduma reakcija nov\u0113r\u0161 stikla oglek\u013ca veido\u0161anos.<\/p>\n
SiC pulveri, kas ieg\u016bti, izmantojot XRD kvantitat\u012bvo anal\u012bzi, t\u0101l\u0101k tiek analiz\u0113ti, izmantojot da\u013ci\u0146u formu, granulometrisko sast\u0101vu un \u012bpatn\u0113j\u0101s virsmas anal\u012bzi. Svar\u012bgas \u012bpa\u0161\u012bbas ir da\u013ci\u0146u forma, granulometriskais sast\u0101vs un \u012bpatn\u0113j\u0101 virsma. SiC da\u013ci\u0146\u0101m parasti ir plakanas, \u0161\u0137eltas strukt\u016bras ar deform\u0113t\u0101m apak\u0161strukt\u016br\u0101m, ko raksturo dislok\u0101ciju re\u017e\u0123i uz to robe\u017e\u0101m - nev\u0113lama \u012bpa\u0161\u012bba, kas var negat\u012bvi ietekm\u0113t sa\u0137epin\u0101\u0161anas procesus.<\/p>\n
Sil\u012bcija karb\u012bdam piem\u012bt daudzas unik\u0101las \u012bpa\u0161\u012bbas, kas \u013cauj to izmantot da\u017e\u0101d\u0101s r\u016bpniec\u012bbas jom\u0101s. Jo \u012bpa\u0161i tas ir \u0101rk\u0101rt\u012bgi ciets, jo t\u0101 ciet\u012bbas r\u0101d\u012bt\u0101js p\u0113c Mosa skalas ir 9. Turkl\u0101t \u0161is materi\u0101ls ir \u0137\u012bmiski inerts, tam ir liela iztur\u012bba pret nodilumu, karstumiztur\u012bba l\u012bdz pat augst\u0101m temperat\u016br\u0101m, laba stiepes iztur\u012bba un zems termisk\u0101s izple\u0161an\u0101s koeficients - visas \u0161\u012bs \u012bpa\u0161\u012bbas kop\u0101 padara sil\u012bcija karb\u012bdu piem\u0113rotu daudziem r\u016bpnieciskiem lietojumiem.<\/p>\n
Sil\u012bcija karb\u012bda ra\u017eo\u0161anas procesiem ir milz\u012bga ietekme uz t\u0101 \u012bpa\u0161\u012bb\u0101m un pielietojumu. Edvards Goodrich Acheson izstr\u0101d\u0101ja Acheson procesu, kas ietver kvarca smil\u0161u, naftas koksa un koksnes \u0161\u0137eldas mais\u012bjuma kars\u0113\u0161anu \u0101rk\u0101rt\u012bgi augst\u0101 temperat\u016br\u0101, lai izrais\u012btu \u0137\u012bmiskas reakcijas, kuru rezult\u0101t\u0101 veidojas sil\u012bcija karb\u012bda krist\u0101li - \u0161os krist\u0101lus p\u0113c tam var sasmalcin\u0101t pulver\u012b vai izliet liet liet\u0146os p\u0101rdo\u0161anai.<\/p>\n
\u0160o abraz\u012bvo pulveri parasti izmanto kosmisk\u0101s avi\u0101cijas un automobi\u013cu r\u016bpniec\u012bb\u0101 deta\u013cu tr\u012b\u0161an\u0101 un piesl\u012bp\u0113\u0161an\u0101, lai ieg\u016btu prec\u012bzus izm\u0113rus un gludu apdari, k\u0101 ar\u012b keramikas, stikla ra\u017eo\u0161an\u0101 un t\u0113rauda un citu met\u0101lu ra\u017eo\u0161an\u0101. Alter Technology, izmantojot \u0161o materi\u0101lu, izveidoja radio sh\u0113mu, kas sp\u0113j iztur\u0113t ekstr\u0113mus apst\u0101k\u013cus kosmos\u0101.<\/p>\n
Sil\u012bcija karb\u012bda keramika ir izcils nonox\u012bda materi\u0101ls ar daudzveid\u012bgu pielietojumu, pateicoties t\u0101 ciet\u012bbai (Mosa ciet\u012bba > 9), \u0137\u012bmiskajai inertumam, zemam termisk\u0101s izple\u0161an\u0101s koeficientam un iztur\u012bbai pret karstumu un triecieniem. Sil\u012bcija karb\u012bds tiek izmantots k\u0101 nodilumiztur\u012bgas deta\u013cas abraz\u012bvos vai nodilumiztur\u012bgas deta\u013cas ugunsiztur\u012bgaj\u0101 keramik\u0101, k\u0101 ar\u012b pusvad\u012bt\u0101ju un elektrotehnikas lietojumos, pateicoties t\u0101 siltumvad\u012btsp\u0113jas \u012bpa\u0161\u012bb\u0101m.<\/p>\n
Lai ra\u017eotu SiC, ra\u017eot\u0101ji vispirms augst\u0101 temperat\u016br\u0101 apvieno amorfu sil\u012bcija dioks\u012bdu ar oglekli - parasti og\u013cu kokss ir oglek\u013ca avots -, p\u0113c tam smalki sasmalcina un sajauc ar nelielu daudzumu boks\u012bta, lai izveidotu sagatavi. P\u0113c tam tiek veikta apstr\u0101de ar sl\u0101pekli (n tipa SiC) vai bora, alum\u012bnija un gallija dopingu (p tipa SiC) atkar\u012bb\u0101 no v\u0113lam\u0101 lietojuma.<\/p>\n
P\u0113c tam ra\u017eot\u0101ji izmanto \u0161o sagatavi, lai ra\u017eotu kubisko sil\u012bcija karb\u012bdu, izmantojot vai nu savieno\u0161anu ar reakciju, vai \u0137\u012bmisko tvaiku uzkl\u0101\u0161anu. Bie\u017e\u0101k izmantot\u0101 metode ir savieno\u0161ana reakcijas ce\u013c\u0101; t\u0101 ietver t\u0101s kars\u0113\u0161anu l\u012bdz 1410 gr\u0101diem p\u0113c Celsija un dopingu ar sl\u0101pekli vai boru, lai ieg\u016btu n-veida SiC. \u0136\u012bmiskajai tvaiku nogulsn\u0113\u0161anai ir nepiecie\u0161ams iev\u0113rojami vair\u0101k ener\u0123ijas un iek\u0101rtu; savieno\u0161anai reakcijas ce\u013c\u0101 ir nepiecie\u0161ams daudz maz\u0101k.<\/p>\n
Vado\u0161s pusvad\u012bt\u0101ju kvalit\u0101tes SiC pulveris ir izstr\u0101d\u0101ts, lai apmierin\u0101tu unik\u0101l\u0101s izaugsmes vajadz\u012bbas, kas saist\u012btas ar da\u017e\u0101d\u0101m metod\u0113m tre\u0161\u0101s paaudzes n tipa vado\u0161u sil\u012bcija karb\u012bda monokrist\u0101lu audz\u0113\u0161anai. \u0160\u0101da veida pulverim ir optim\u0101ls da\u013ci\u0146u izm\u0113ru sadal\u012bjums ar nelielu tuk\u0161umu skaitu, un t\u0101 t\u012br\u012bbas l\u012bmenis p\u0101rsniedz 6N.<\/p>","protected":false},"excerpt":{"rendered":"
K\u0101 izgatavot sil\u012bcija karb\u012bda pulverus Sil\u012bcija karb\u012bds, ko bie\u017e\u0101k d\u0113v\u0113 par karborundu, ir ciets k\u0101 dimants un \u013coti iztur\u012bgs pret nodilumu. Turkl\u0101t t\u0101 keramisk\u0101s \u012bpa\u0161\u012bbas padara to piem\u0113rotu augsttemperat\u016bras vid\u0113m un sprieguma vid\u0113m. Lely procesa ra\u017eo\u0161anas rezult\u0101t\u0101 tiek ieg\u016bts pulveris, ko var sagriezt moisan\u012bta d\u0101rgakme\u0146os izmanto\u0161anai k\u0101 d\u0101rgakme\u0146us, bet ... Las\u012bt t\u0101l\u0101k<\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-19","post","type-post","status-publish","format-standard","hentry","category-knowledge"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/posts\/19","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=19"}],"version-history":[{"count":1,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/posts\/19\/revisions"}],"predecessor-version":[{"id":20,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/posts\/19\/revisions\/20"}],"wp:attachment":[{"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/media?parent=19"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/categories?post=19"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/siliconcarbidepowders.com\/lv\/wp-json\/wp\/v2\/tags?post=19"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}