ʻEkolu mau ʻano nui o ka silicon carbide polymorph
Aia ma kahi o 250 mau ʻano crystalline o ka silicon carbide. No ka mea he moʻo o nā polytypes homogeneous me ke ʻano kristal like, loaʻa i ka silicon carbide nā ʻano o ka polycrystalline homogeneous.
He mea kākaʻikahi loa ka Silicon carbide (Mosanite) ma ka Honua, akā he mea maʻamau ia ma ka lewa. ʻO ka cosmic silicon carbide kahi ʻāpana maʻamau o ka lepo cosmic a puni nā hōkū kalapona. ʻO ka silicon carbide i loaʻa ma ka lewa a me nā meteorites he β-phase crystalline paha.
ʻO A-sic ka mea maʻamau o kēia mau polytypes. Hoʻokumu ʻia ia ma nā mahana ma mua o 1700°C a he ʻano kristal hexagonal like me ka wurtzite.
ʻO B-sic, nona ke ʻano kristal sphalerite e like me ka daimana, ua hoʻokumu ʻia ma lalo o 1700°C.
Ka manawa hoʻouna: ʻAukake-30-2022