Alpha-alumina ili ndi mphamvu zokhazikika za mankhwala, kukana dzimbiri, kuuma kwambiri, mphamvu zabwino zotetezera kutentha, kusungunuka kwambiri komanso kulimba kwambiri, ndipo imagwiritsidwa ntchito m'magawo osiyanasiyana.
Kugwiritsa ntchito ufa wa α-alumina mu zoumba
Ma ceramic a alumina a microcrystalline ndi mtundu watsopano wa zinthu za ceramic zomwe zimakhala ndi kapangidwe kofanana komanso kokhuthala komanso kukula kwa nano kapena sub-micron. Uli ndi ubwino wa mphamvu yamakina, kukana kuwonongeka, kukana dzimbiri, kukana okosijeni, kusinthasintha kwa kukula komanso kukhazikika bwino kwa kutentha. Mbali yake yayikulu ndi yakuti kristalo yoyamba ndi yaying'ono. Chifukwa chake, chofunikira kwambiri paukadaulo wokonzekera ma ceramic a alumina a microcrystalline ndikukonzekera ufa wa α-Al2O3 ndi kristalo yaying'ono yoyambirira komanso ntchito yayikulu yochotsa zinthu. Ufa wa α-Al2O3 uwu ukhoza kukhala thupi lokhuthala la ceramic pa kutentha kochepa kochotsa zinthu.
Kugwiritsa ntchito ufa wa α-alumina mu zinthu zotsutsa
Ufa wa α-Al2O3 umasiyana ndi zinthu zotsalira malinga ndi momwe umagwiritsidwira ntchito, ndipo zofunikira za ufa nazonso zimasiyana. Mwachitsanzo, ngati mukufuna kufulumizitsa kuchulukana kwa zinthu zotsalira, nano-alumina ndiye chisankho chabwino kwambiri; ngati mukufuna kukonzekera zotsalira zooneka ngati zotsalira, muyenera ufa wa α-Al2O3 wokhala ndi tinthu tating'onoting'ono, kucheperako pang'ono, komanso kukana kusinthasintha kwamphamvu. Ma crystallites ooneka ngati flake kapena plate ndi abwino; koma ngati ndi chinthu chotsalira chotsalira, α-Al2O3 imafunika kuti ikhale ndi madzi okwanira, ntchito yayikulu yochotsa zinthu zotsalira, ndipo kufalikira kwa tinthu tating'onoting'ono kumafuna kuchuluka kwakukulu kwa zinthu zotsalira, ndipo ma crystallites osalala ndi abwino.
Kugwiritsa ntchito ufa wa α-alumina mu zinthu zopukutira
Kugwiritsa ntchito kupukuta kosiyanasiyana kumafuna zipangizo zosiyanasiyana. Zinthu zopukutira mopanda kukhwima ndi kupukuta kwapakati zimafuna mphamvu yodulira mwamphamvu komanso kuuma kwambiri, kotero kapangidwe kake kakang'ono ndi makhiristo amafunika kukhala olimba; ufa wa α-alumina wopukutira bwino umafuna kuti chinthu chopukutidwacho chikhale cholimba pang'ono komanso chonyezimira kwambiri. Chifukwa chake, kristalo yoyamba ya α-Al2O3 ikakhala yaying'ono, zimakhala bwino.
Kugwiritsa ntchito ufa wa α-alumina mu zinthu zodzaza
Mu zinthu zodzaza, kuti zitsimikizire kuti zimagwirizana bwino ndi zinthu zachilengedwe ndikuchepetsa kukhuthala kwa dongosolo, chofunikira kwambiri pa α-Al2O3 ndikuti kusinthasintha kwake kukhale kokwanira, makamaka kozungulira, chifukwa sphericity ikakwera, pamwamba pake. Mphamvu ikachepa, kusinthasintha kwa pamwamba pa mpira kumakhala bwino; chachiwiri, ufa wa α-Al2O3 wokhala ndi kapangidwe ka kristalo kokwanira, kuyera kwambiri kwa mankhwala ndi mphamvu yokoka yeniyeni imakhala ndi mphamvu yabwino yoyendetsera kutentha komanso zotsatira zabwino ikagwiritsidwa ntchito poteteza komanso kulamulira kutentha.
Kugwiritsa ntchito ufa wa α-alumina mu zinthu za capacitor corundum
Mu mafakitale, ufa wa α-alumina wokha nthawi zambiri umapakidwa mu uvuni wamagetsi wotentha kwambiri kuti upange corundum yopangira, yomwe imadziwikanso kuti fused corundum. Chida ichi chili ndi mawonekedwe a kuuma kwambiri, m'mbali ndi ngodya zomveka bwino, ndipo kapangidwe kake kamakhala kozungulira. Pakupukutira mwachangu, tinthu tating'onoting'ono timakhala ndi mphamvu yodula kwambiri, ndipo tinthu tating'onoting'ono tomwe timaphwanyidwa mosavuta, motero timawonjezera nthawi yake yogwirira ntchito.