Vim li cas qhov ntom ntawm alumina ceramics hloov

Hauv kev lag luam ceramics, kev txhim kho tau nrawm dua thiab nrawm dua, thiab ntau lub lag luam tau loj dua thiab cov khoom lag luam zoo kuj tau txais txiaj ntsig zoo vim yog cov khoom siv ceramics. Aluminium oxide ceramics, ua ib qho ntawm lawv, tau dhau los ua kev paub tab hauv kev tsim khoom siv tshuab. Lawv tuaj yeem muab faib ua ob pawg. Ib qho yog ceramics nrog cov ntsiab lus ntshiab txhuas oxide, uas nws qhov kub thiab txias tuaj yeem ncav cuag 1800 degree. Cov khoom siv hauv txoj kev no tuaj yeem hloov platinum thiab siv los ua cov khoom siv rwb thaiv tsev.
Thiab lwm hom yog hom zoo tib yam, uas yog cais raws li cov ntsiab lus ntawm alumina, feem ntau yog siv rau hauv peb lub neej txhua hnub, xws li ua cov khoom kub-resistant crucibles, ua ceramic valve phaj, bearings, thiab lwm yam. Qhov ntom ntawm alumina ceramics yog. cuam ​​tshuam los ntawm cov khoom ntawm alumina nws tus kheej.
Nyob rau hauv chemistry, qhov no yog ib tug compound, tab sis nyob rau hauv cov nqe lus ntawm cov txheej txheem, nws tsuas yog siv tau raws li ib yam khoom vim hais tias nws kuj muaj ntau impurities thiab tsis ntshiab alumina. Nws paub zoo tias alumina muaj qhov nyuaj siab thiab yog amphoteric oxide uas nquag muaj kev cuam tshuam thiab ionization, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau kev ua cov khoom siv refractory. Thaum ua cov ceramics, kub kub sintering kuj yuav tsum tau, yog li xaiv alumina ua ib tug compound yuav tsis txhob raug hlawv tawm ib nrab.
Tom qab tsim cov alumina ceramics, cov kauj ruam ntawm kev ua kom huv siab pib, tab sis qhov ceev ib txwm ua tsis tau raws li qhov yuav tsum tau ua. Lub sijhawm no, nws tuaj yeem txiav txim siab seb nws puas yog teeb meem nrog cov hmoov qub thiab cov mis. Yog tias tsis muaj teeb meem ntawm cov hauv paus hniav, txoj kev xws li nce siab thiab sintering kub tuaj yeem siv. Txawm li cas los xij, thaum lub sij hawm purification siab, tsis txhob ncua lub sij hawm rwb thaiv tsev, vim nws yuav ua rau deformation ntawm cov nplej hauv lub alumina. Hauv txoj kev xav, nws yuav tsum tau ua kom cov nplej sib xyaw kom nws cov qauv muaj pes tsawg leeg zoo txaus.