Ultra High Precision Ceramic Material: silicon carbide, alumina, zirconia, silicon nitride

Pamsika, timadziwa bwino zida zapadera za ceramic: silicon carbide, alumina, zirconia, silicon nitride.Kufuna kwamsika kwathunthu, pendani ubwino wa mitundu ingapo yazinthu izi.
Silicon carbide ili ndi zabwino zamtengo wotchipa, kukana kukokoloka kwabwino, mphamvu yayikulu, choyipa chachikulu ndichosavuta kutulutsa oxidize, ndizovuta kuti sintering.Alumina ndi yotsika mtengo kwambiri, ndipo njira yokonzekera ufa ndi yokhwima kwambiri, pamene zirconia ndi silicon nitrous oxide zili ndi zovuta zoonekeratu pankhaniyi, zomwenso ndi chimodzi mwazomwe zimalepheretsa kukula kwa awiriwa.Silicon nitride, makamaka, ndiyo yokwera mtengo kwambiri.
Pankhani ya magwiridwe antchito, ngakhale mphamvu, kulimba ndi zina zamakina za silicon nitride ndi zirconia ndizabwino kwambiri kuposa alumina, zikuwoneka kuti mtengo wake ndi woyenerera, koma kwenikweni pali mavuto ambiri.Choyamba kuchokera zirconia, ali kulimba mkulu, chifukwa ndi kukhalapo kwa stabilizer, koma kulimba kwake mkulu ndi nthawi tcheru, sangagwiritsidwe ntchito pa kutentha ndi chipinda kutentha tcheru nthawi kwambiri kuletsa chitukuko cholakwika makutidwe ndi okosijeni, ayenera adanena kuti ndi yaying'ono kwambiri mwa atatu omwe ali pamsika.Ndipo silicon nitride, nayenso ndi ceramic wotchuka m'zaka makumi awiri zapitazi, mphamvu zogwiritsira ntchito kutentha zowonongeka ndi ntchito zina zonse ndi zabwino, koma kugwiritsa ntchito kutentha kumakhala kochepa kuposa ziwiri zina;Kukonzekera kwa silicon nitride ndizovuta kwambiri kuposa alumina, ngakhale kugwiritsa ntchito silicon nitride gawo kuli bwino kwambiri kuposa zirconia, koma kuyerekezera kwakukulu sikuli bwino ngati alumina.
Kuchita kotsika mtengo, kosasunthika, kusiyanasiyana kwazinthu zazitsulo za alumina kunakhala kugwiritsidwa ntchito koyambirira, ndipo kwakhala kukugwiritsidwa ntchito pazida zamakono zapadera.