Alumina Ceramic: Kugwira Ntchito Kwabwino Kwambiri Ndi Mohs Kulimba 9

Alumina ceramic ndi chinthu chapamwamba kwambiri chomwe chimadziwika ndi kuuma kwake kwa Mohs kwa 9. Izi zimapangitsa kuti ikhale chisankho chabwino kwambiri chogwiritsidwa ntchito molimbika, makamaka pamene zinthu zayamba kuuma, dzimbiri, komanso kutentha kwambiri. Nkhaniyi ikufotokoza za chiyambi cha kuuma kwake kwakukulu komanso momwe zimagwirira ntchito bwino kwambiri.

Kulimba kwakukulu kwa alumina ceramic chifukwa cha kapangidwe kake kapadera ka kristalo ndi mgwirizano wa mankhwala. Gawo lake lalikulu, α-alumina (α-Al₂O₃), limagwiritsa ntchito kapangidwe ka corundum kokhala ndi ma ayoni a okosijeni ndi aluminiyamu olumikizidwa bwino omwe amalumikizidwa ndi kuyanjana kwamphamvu kwa ionic ndi covalent. Kulumikizana kumeneku kumapereka mphamvu zambiri, zomwe zimathandiza kuti zinthuzo zisawonongeke komanso kusweka kwa pulasitiki pansi pa kupsinjika kwakunja. Kuphatikiza apo, zipangizo zopangira zoyera kwambiri komanso njira zapamwamba zoyeretsera zimachotsa zolakwika zazing'ono, zomwe zimawonjezera kuchulukana ndi kuuma.

Kuuma kwambiri kumatanthauza kuti imagwira ntchito bwino kwambiri. Kukana kwake kutopa kwambiri kumapangitsa kuti igwiritsidwe ntchito kwambiri m'makina ogwiritsira ntchito malasha m'mafakitale opanga magetsi, zida zochotsera fumbi m'mafakitale achitsulo, mapaipi onyamula miyala m'migodi, makina opera ufa wosaphika ndi clinker m'mafakitale a simenti, ndi zida zotumizira ufa m'makampani opanga mankhwala, zomwe zimagwira ntchito bwino kuposa zitsulo zachikhalidwe. Kuphatikiza apo, zinthuzi zimakhala ndi kukana dzimbiri kwa mankhwala, kupirira ma acid amphamvu, alkalis, ndi zosungunulira zachilengedwe. Pa kutentha kwambiri, alumina ceramic imasunga mphamvu zokhazikika zamakanika ndi mankhwala, imagwira ntchito modalirika kuposa 1600°C. Kuphatikiza apo, kuuma kwambiri kumathandizira kuti magetsi aziteteza bwino komanso kuti kutentha kukhale kochepa, zomwe zimapangitsa kuti ikhale yoyenera zida zamagetsi ndi zida zoyendetsera kutentha.

Powombetsa mkota,alumina ceramic, yokhala ndi kuuma kwake kwa Mohs kwa 9, imagwira ntchito yofunika kwambiri m'mafakitale ndi ukadaulo. Kulimba kwake kwambiri pakuwonongeka ndi dzimbiri, kukhazikika kwake kutentha kwambiri, komanso mphamvu zake zotetezera magetsi zimapangitsa kuti ikhale chinthu chofunikira kwambiri popanga zinthu zapamwamba komanso ukadaulo watsopano. Pamene njira zopangira zinthu zikupitilira kusintha, mwayi wogwiritsa ntchito alumina ceramic ukuyembekezeka kukula kwambiri.