1. I-Crystallography kanye Nezisekelo Zezinto Ze-Silicon Carbide
1.1 I-Polymorphism kanye ne-Atomic Bonding ku-SiC
(I-Silicon Carbide Ceramic Plates)
I-silicon carbide (I-SiC) into ehlanganisiwe ye-ceramic eyenziwe nge-silicon nama-athomu e-carbon ku-a 1:1 isilinganiso se-stoichiometric, ikhonjwe nge-polymorphism yayo eyingqayizivele– phezu 250 ama-polytypes aziwayo– wonke abelana ngamabhondi aqinile okuqondisayo kodwa ahluka ngochungechunge lokunqwabelanisa lwama-Si-C bilayers.
Enye yama-polytypes afaneleka kakhulu yi-3C-SiC (uhlaka lwe-cubic zinc blende), kanye nezinhlobo ezinama-hexagonal 4H-SiC kanye no-6H-SiC, ngayinye ibonisa ukuhluka okucashile ku-bandgap, ukuhamba kwe-electron, kanye ne-thermal conductivity ethinta ukufaneleka kwazo kwemininingwane yezinhlelo zokusebenza.
Ukuqina kweSi– C isibopho, ngamandla ebhondi cishe 318 kJ/mol, isekela ukuqina okuphawulekayo kwe-SiC (Ukuqina kwe-Mohs kwe-9– 9.5), high melting factor (~ 2700 °C), kanye nokumelana nokubhujiswa kwamakhemikhali kanye nokushaqeka kokushisa.
Emapuletini e-ceramic, i-polytype ivame ukukhethwa ngokusekelwe ekusetshenzisweni okuhlosiwe: 6I-H-SiC iphumelela ezinhlelweni zezakhiwo ngenxa yobulula bayo bokuhlanganisa, kuyilapho i-4H-SiC ilawula kuma-electronics anamandla aphezulu ngesihlalo esinamasondo somhlinzeki wemali ephakeme.
I-bandgap ebanzi (2.9– 3.3 eV kuye ngokuthi polytype) ngaphezu kwalokho yenza i-SiC ibe isivikelo esikhethekile sikagesi ngohlobo lwayo olumsulwa, nakuba ingenziwa i-doped ukuze isebenze njenge-semiconductor kumathuluzi akhethekile wedijithali.
1.2 I-Microstructure kanye Nobumsulwa Besiteji Emapuletini eCeramic
Ukusebenza kwamapuleti e-silicon carbide ceramic kuncike kakhulu kuzici ze-microstructural njengosayizi wokusanhlamvu, ukujiya, homogeneity esiteji, kanye nokuba khona kwezigaba ezengeziwe noma ukungcoliswa.
Amapuleti ebanga eliphakeme avame ukwakhiwa kusuka ku-submicron noma i-nanoscale SiC powders anezindlela eziyinkimbinkimbi zokucwilisa., okwenza kube lula, ama-microstructures aminyene ngokuphelele akhulisa ukuqina komshini kanye nokuhamba kahle kwe-thermal.
Ukungcola okufana nekhabhoni yamahhala, i-silica (SIO LESIBILI), noma usizo lwe-sintering njenge-boron noma i-aluminium enesisindo esincane kufanele ilawulwe kahle, njengoba bekwazi ukwenza amafilimu e-intergranular ehlisa amandla okushisa aphezulu kanye nokumelana ne-oxidation.
I-porosity ephindaphindiwe, futhi ngamadigri ancishisiwe (
I-Advanced Ceramics yasungulwa ngo-Okthoba 17, 2012, yibhizinisi lobuchwepheshe obuphezulu elizinikele ocwaningweni nasekuthuthukisweni, ukukhiqiza, ukucubungula, ukuthengisa kanye nezinsizakalo zobuchwepheshe zezinto ezihlobene ne-ceramic ezifana ne-Silicon Carbide Ceramic Plates. Imikhiqizo yethu ihlanganisa kodwa ingagcini nje nge-Boron Carbide Ceramic Products, I-Boron Nitride Ceramic Products, Imikhiqizo ye-Silicon Carbide Ceramic, Imikhiqizo ye-Silicon Nitride Ceramic, I-Zirconium Dioxide Ceramic Products, njll. Uma unentshisekelo, sicela ukhululeke ukuxhumana nathi.
Omaka: ipuleti le-silicon carbide,ipuleti carbide,ishidi le-silicon carbide
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