Pamsika, tikudziwa bwino zinthu zapadera zadothi: silicon carbide, alumina, zirconia, silicon nitride. Kufunika kwakukulu pamsika, fufuzani ubwino wa mitundu ingapo ya zipangizozi.
Silicon carbide ili ndi ubwino wake chifukwa ndi yotsika mtengo, yolimba kwambiri, yolimba kwambiri, yovuta kwambiri kuisakaniza mosavuta, komanso yovuta kuiwononga. Alumina ndiyo yotsika mtengo kwambiri, ndipo njira yokonzekera ufa ndi yokhwima kwambiri, pomwe zirconia ndi silicon nitrous oxide zili ndi zovuta zomveka bwino pankhaniyi, zomwe ndi chimodzi mwa zolepheretsa zomwe zimalepheretsa kukula kwa ziwirizi. Silicon nitride, makamaka, ndiyo yokwera mtengo kwambiri.
Ponena za magwiridwe antchito, ngakhale mphamvu, kulimba ndi zina zomwe zimapangidwa ndi silicon nitride ndi zirconia ndizabwino kwambiri kuposa alumina, zikuwoneka kuti magwiridwe antchito ake ndi oyenera, koma kwenikweni pali mavuto ambiri. Choyamba kuchokera ku zirconia, ili ndi kulimba kwakukulu, chifukwa chake ndi kukhalapo kwa chokhazikika, koma kulimba kwake kwakukulu kumadalira nthawi, sikungagwiritsidwe ntchito kutentha kwambiri ndipo kutentha kwa chipinda nthawi kumaletsa kwambiri kukula kolakwika kwa okosijeni, ziyenera kunenedwa kuti ndi yaying'ono kwambiri mwa zitatu zomwe zili pamsika. Ndipo silicon nitride, yomwe ndi ceramic yotchuka kwambiri m'zaka makumi awiri zapitazi, mphamvu yolimba ya kutentha komanso magwiridwe antchito ena onse ndi abwino, koma kugwiritsa ntchito kutentha ndikotsika kuposa ziwiri zina; Njira yokonzekera silicon nitride nayonso ndi yovuta kuposa alumina, ngakhale kugwiritsa ntchito gawo la silicon nitride kuli bwino kwambiri kuposa zirconia, koma kufananiza konse sikuli bwino ngati alumina.
Kugwiritsa ntchito zinthu zosiyanasiyana za alumina ceramics motsika mtengo komanso mokhazikika, kwakhala koyambirira kugwiritsidwa ntchito, ndipo kwakhala kukugwiritsidwa ntchito pa zinthu zapadera za ceramics zomwe zilipo.
Nthawi yotumizira: Januwale-22-2022