Kapangidwe ka silicon carbide

Mitundu itatu ikuluikulu ya silicon carbide polymorph

Pali mitundu pafupifupi 250 ya silicon carbide yopangidwa ndi makristalo. Popeza silicon carbide ili ndi mitundu yosiyanasiyana ya ma polytypes okhala ndi mawonekedwe ofanana a kristalo, silicon carbide ili ndi mawonekedwe ofanana a polycrystalline.

Silikoni carbide (Mosanite) ndi yosowa kwambiri padziko lapansi, koma imapezeka kwambiri mumlengalenga. Silikoni carbide ya cosmic nthawi zambiri imakhala gawo lofala la fumbi la cosmic lozungulira nyenyezi za kaboni. Silikoni carbide yomwe imapezeka mumlengalenga ndi meteorites nthawi zambiri imakhala yofanana ndi β-phase crystalline.

A-sic ndiye mtundu wofala kwambiri wa polytypes izi. Umapangidwa kutentha kopitilira 1700°C ndipo uli ndi mawonekedwe a kristalo a hexagonal ofanana ndi wurtzite.

B-sic, yomwe ili ndi kapangidwe ka kristalo ka sphalerite kofanana ndi diamondi, imapangidwa pa kutentha kosakwana 1700°C.