Njira Zopangira Ufa Wapamwamba wa SiC

Silicon carbide (SiC)ndi mankhwala opangidwa ndi organic omwe amadziwika ndi zinthu zake zapadera. SiC yochitika mwachilengedwe, yotchedwa moissanite, ndiyosowa kwambiri. Mu ntchito za mafakitale,silicon carbideamapangidwa makamaka kudzera mu njira zopangira.
Ku Semicera Semiconductor, timagwiritsa ntchito njira zapamwamba zopangiraufa wapamwamba wa SiC.

Njira zathu zikuphatikizapo:
Njira ya Acheson:Njira yachikhalidwe yochepetsera carbothermal iyi imaphatikizapo kusakaniza mchenga wa quartz woyeretsedwa kwambiri kapena ore wophwanyidwa wa quartz ndi petroleum coke, graphite, kapena anthracite ufa. Kusakaniza kumeneku kumatenthedwa ndi kutentha kwa 2000 ° C pogwiritsa ntchito electrode ya graphite, zomwe zimapangitsa kuti α-SiC ufa.
Kuchepetsa Kutentha kwa Carbothermal:Pophatikiza ufa wabwino wa silika ndi ufa wa kaboni ndikuchita zomwe zimachitika pa 1500 mpaka 1800 ° C, timatulutsa ufa wa β-SiC wokhala ndi chiyero chokhazikika. Njirayi, yofanana ndi njira ya Acheson koma pa kutentha kochepa, imatulutsa β-SiC ndi mawonekedwe apadera a kristalo. Komabe, kukonzanso pambuyo pochotsa mpweya wotsalira ndi silicon dioxide ndikofunikira.
Silicon-Carbon Direct Reaction:Njirayi imaphatikizapo kuchitapo kanthu mwachindunji zitsulo za silicon ufa ndi ufa wa carbon pa 1000-1400 ° C kuti apange ufa wapamwamba wa β-SiC. α-SiC ufa umakhalabe chinthu chofunikira kwambiri cha silicon carbide ceramics, pomwe β-SiC, yokhala ndi mawonekedwe ake ngati diamondi, ndi yabwino kwambiri pogaya ndi kupukuta ntchito.
Silicon carbide ikuwonetsa mitundu iwiri ikuluikulu ya kristalo:α ndi b. β-SiC, yokhala ndi makina ake a cubic crystal, imakhala ndi lattice yolowera kumaso kwa silicon ndi kaboni. Mosiyana, α-SiC imaphatikizapo ma polytypes osiyanasiyana monga 4H, 15R, ndi 6H, ndi 6H yomwe imagwiritsidwa ntchito kwambiri m'makampani. Kutentha kumakhudza kukhazikika kwa ma polytypes: β-SiC imakhala yokhazikika pansi pa 1600 ° C, koma pamwamba pa kutentha kumeneku, pang'onopang'ono imasintha ku α-SiC polytypes. Mwachitsanzo, 4H-SiC imapanga mozungulira 2000 ° C, pamene 15R ndi 6H polytypes imafuna kutentha pamwamba pa 2100 ° C. Zodziwika bwino, 6H-SiC imakhalabe yokhazikika ngakhale kutentha kopitilira 2200 ° C.

Ku Semicera Semiconductor, tadzipereka kupititsa patsogolo ukadaulo wa SiC. ukatswiri wathu muKupaka kwa SiCndi zida zimatsimikizira magwiridwe antchito apamwamba komanso magwiridwe antchito anu a semiconductor. Onani momwe mayankho athu apamwamba angakulitsire njira zanu ndi zinthu zanu.