I-Alpha-alumina inezakhiwo zamakhemikhali ezizinzile, ukumelana nokugqwala, ubulukhuni obuphezulu, izakhiwo ezinhle zokuvikela, indawo yokuncibilika ephezulu kanye nokuqina okuphezulu, futhi isetshenziswa emikhakheni ehlukene.
Ukusetshenziswa kwempuphu ye-α-alumina ezintweni zobumba
I-Microcrystalline alumina ceramics uhlobo olusha lwezinto ze-ceramic ezinesakhiwo esifanayo nesiqinile kanye nosayizi we-nano noma we-sub-micron grain. Inezinzuzo zamandla aphezulu omshini, ukumelana nokuguguleka, ukumelana nokugqwala, ukumelana nokushiswa kwe-oxidation, i-coefficient yokwandiswa elungisekayo kanye nokuqina okuhle kokushisa. Isici sayo esiyinhloko ukuthi i-crystal eyinhloko incane. Ngakho-ke, isimo sobuchwepheshe esibaluleke kakhulu sokulungiselela i-microcrystalline alumina ceramics ukulungiselela i-α-Al2O3 powder ene-crystal encane yokuqala kanye nomsebenzi ophezulu wokushiswa kwe-sintering. Le powder ye-α-Al2O3 ingaba umzimba we-ceramic oqinile ekushiseni okuphansi kokushiswa kwe-sintering.
Ukusetshenziswa kwempuphu ye-α-alumina ezintweni eziphikisayo
Impuphu ye-α-Al2O3 ihlukile ezintweni eziphikisayo ngokuya ngesicelo, futhi izidingo zempuphu nazo zihlukile. Isibonelo, uma ufuna ukusheshisa ukuqina kwezinto eziphikisayo, i-nano-alumina iyisinqumo esingcono kakhulu; uma ufuna ukulungiselela izinto eziphikisayo ezimise okwesimo, udinga impuphu ye-α-Al2O3 enezinhlamvu eziqinile, ukuncibilika okuncane, kanye nokumelana okunamandla kokuguquguquka. Amakristalu amise okwe-flake noma ipuleti angcono; kodwa uma kuyizinto eziphikisayo ezingapheli, i-α-Al2O3 iyadingeka ukuze ibe nokugeleza okuhle, umsebenzi ophezulu wokusila, kanye nokusatshalaliswa kosayizi wezinhlayiya kudinga ubuningi obukhulu, futhi amakristalu amise okwehlisiwe angcono.
Ukusetshenziswa kwempuphu ye-α-alumina ezintweni zokupholisha
Izicelo ezahlukene zokupholisha zidinga izinto ezahlukene. Imikhiqizo yokupholisha okuqinile kanye nokupholisha okuphakathi idinga amandla okusika aqinile kanye nobunzima obukhulu, ngakho-ke isakhiwo sayo esincane kanye namakristalu kudingeka kube mancane; i-α-alumina powder yokupholisha okuncane idinga ukuthi umkhiqizo opholishiwe ube nobulukhuni obuphansi bomphezulu kanye nokucwebezela okuphezulu. Ngakho-ke, uma ikristalu eyinhloko ye-α-Al2O3 incane, kungcono.
Ukusetshenziswa kwempuphu ye-α-alumina ezintweni zokugcwalisa
Entweni yokugcwalisa, ukuze kuqinisekiswe ukuthi ihlangana kahle nezinto eziphilayo futhi inciphise umthelela ekuqineni kohlelo, imfuneko eyisisekelo ye-α-Al2O3 ukuthi ukugeleza kuhle ngokwanele, okungcono kube yindilinga, ngoba uma i-sphericity iphakeme, ubuso buyanda. Uma amandla emancane, ukugeleza kobuso kwebhola kuba ngcono; okwesibili, i-α-Al2O3 powder enokuthuthukiswa okuphelele kwekristalu, ubumsulwa obuphezulu bamakhemikhali kanye nobukhulu bamandla adonsela phansi obuthile obuphezulu bunokuqhuba okungcono kokushisa kanye nomphumela ongcono uma kusetshenziselwa izinto zokufaka umswakama kanye nokuqhuba ukushisa.
Ukusetshenziswa kwempuphu ye-α-alumina ezintweni ze-capacitor corundum
Embonini, i-α-alumina powder emsulwa ivame ukushiswa esithandweni sikagesi esishisa kakhulu ukuze kwenziwe i-corundum yokwenziwa, eyaziwa nangokuthi i-fused corundum. Le nto inezici zobulukhuni obuphezulu, imiphetho ecacile namakhona, futhi isakhiwo esincane kungcono siseduze ne-spherical. Enkambisweni yokugaya ngesivinini esikhulu, izinhlamvu ezihuquzelayo zinamandla amakhulu okusika, futhi izinhlamvu ezihuquzelayo akulula ukuziphula. ngaleyo ndlela zandisa impilo yazo yokusebenza.