Peb hom tseem ceeb ntawm silicon carbide polymorph
Muaj txog 250 crystalline daim ntawv ntawm silicon carbide. Vim hais tias silicon carbide muaj ntau homogeneous polytypes nrog cov qauv siv lead ua zoo sib xws, silicon carbide muaj cov yam ntxwv ntawm homogeneous polycrystalline.
Silicon carbide (Mosanite) yog qhov tsawg heev hauv ntiaj teb, tab sis nws muaj ntau heev hauv qhov chaw. Cosmic silicon carbide feem ntau yog ib feem ntawm cov hmoov av cosmic nyob ib ncig ntawm cov hnub qub. Cov silicon carbide pom nyob rau hauv qhov chaw thiab meteorites yog yuav luag invariably β-theem crystalline.
A-sic yog feem ntau ntawm cov polytypes. Nws yog tsim los ntawm qhov kub siab tshaj 1700 ° C thiab muaj cov qauv siv lead ua hexagonal zoo ib yam li wurtzite.
B-sic, uas muaj pob zeb diamond zoo li sphalerite siv lead ua qauv, yog tsim ntawm tsawg dua 1700 ° C.
Post lub sij hawm: Aug-30-2022