Silicon carbide kapangidwe

Mitundu itatu yayikulu ya silicon carbide polymorph

Pali mitundu pafupifupi 250 ya silicon carbide. Chifukwa silicon carbide ili ndi ma polytypes angapo okhala ndi mawonekedwe ofanana a kristalo, silicon carbide ili ndi mawonekedwe a homogeneous polycrystalline.

Silicon carbide (Mosanite) ndiyosowa kwambiri padziko lapansi, koma ndiyofala kwambiri mumlengalenga. Cosmic silicon carbide nthawi zambiri ndi gawo lodziwika bwino la fumbi la cosmic lozungulira nyenyezi za kaboni. Silicon carbide yomwe imapezeka mumlengalenga ndi meteorites imakhala pafupifupi β-phase crystalline.

A-sic ndi omwe amapezeka kwambiri mwa mitundu yambiri ya polytypes. Amapangidwa pa kutentha kwakukulu kuposa 1700 ° C ndipo ali ndi mawonekedwe a kristalo a hexagonal ofanana ndi wurtzite.

B-sic, yomwe ili ndi mawonekedwe a diamondi ngati sphalerite crystal, imapangidwa pansi pa 1700 ° C.