Hmoov alumina yog cov khoom siv tseem ceeb ntawm cov pob zeb dawb fused alumina thiab lwm yam abrasives, uas muaj cov yam ntxwv ntawm kev tiv taus kub siab, tiv taus corrosion thiab ruaj khov. Nano-alumina XZ-LY101 yog cov kua tsis muaj xim thiab pob tshab, uas yog siv dav ua cov khoom ntxiv rau hauv ntau yam acrylic resins, polyurethane resins, epoxy resins, thiab lwm yam. Nws kuj tseem tuaj yeem yog cov dej-raws li lossis roj-raws li cov kuab tshuaj, thiab tuaj yeem coated rau ntawm cov ntaub ntawv iav txheej, pob zeb diamond, cov ntaub ntawv precision instrument, thiab lwm yam.; thiab ntau hom alumina hmoov muaj kev siv sib txawv. Cov hauv qab no tsom mus rau kev qhia txog kev siv α, γ, thiab β-hom alumina hmoov.
1.α-alumina hmoov
Hauv lub lattice ntawm α-hom alumina hmoov, cov pa oxygen ions tau ntim ze rau hauv cov duab hexagonal, Al3 + tau faib ua ke hauv qhov chaw sib koom ua ke octahedral uas muaj cov pa oxygen ions nyob ib puag ncig, thiab lub zog lattice loj heev, yog li qhov melting point thiab boiling point siab heev. α-hom oxidation Aluminium tsis yaj hauv dej thiab kua qaub. Nws tseem hu ua txhuas oxide hauv kev lag luam. Nws yog cov khoom siv raw rau kev ua cov hlau txhuas; nws kuj siv los ua ntau yam cib refractory, refractory crucibles, refractory kav dej, thiab cov cuab yeej sim kub siab; nws kuj siv tau ua abrasive, nplaim taws retardant High-purity alpha alumina kuj yog cov khoom siv raw rau kev tsim cov corundum dag, ruby thiab sapphire; nws kuj siv los tsim cov substrate ntawm cov voj voog loj niaj hnub.
2. γ-alumina hmoov
γ-hom alumina yog txhuas hydroxide nyob rau hauv 140-150 ℃ qis-kub ib puag ncig dehydration system, kev lag luam tseem hu ua active alumina, txhuas kua nplaum. Cov qauv ntawm cov pa oxygen ion approximation rau sab ntsug ntawm lub hauv paus ze stacked, Al3 + faib irregularly hauv cov pa oxygen ion puag ncig los ntawm octahedral thiab tetrahedral qhov sib txawv. γ-hom alumina insoluble hauv dej, tuaj yeem yaj hauv cov kua qaub muaj zog lossis cov kua alkali muaj zog, nws yuav raug cua sov rau 1200 ℃ yuav hloov pauv mus rau α-hom alumina. γ-hom alumina yog cov khoom siv porous, thaj chaw sab hauv ntawm txhua gram txog li pua pua square meters, muaj peev xwm adsorption siab. Cov khoom lag luam feem ntau yog cov khoom tsis muaj xim lossis me ntsis pinkish cylindrical nrog kev tiv thaiv siab zoo. Hauv kev lag luam roj av refining thiab petrochemical feem ntau siv ua adsorbent, catalyst thiab catalyst carrier; hauv kev lag luam yog transformer roj, turbine roj deacidification tus neeg sawv cev, kuj siv rau xim txheej tsom xam; Hauv chav kuaj mob, nws muaj cov tshuaj desiccant uas tsis muaj zog, thiab nws lub peev xwm ziab tsis tsawg dua li phosphorus pentoxide, tom qab siv rau hauv 175 ℃ cua sov 6-8 teev, nws kuj tseem tuaj yeem rov ua dua thiab rov siv dua.
3.β-alumina hmoov
β-hom alumina hmoov kuj tseem hu ua active alumina hmoov. Activated alumina hmoov muaj lub zog siab, muaj zog hygroscopicity, tsis o lossis tawg tom qab nqus dej, tsis muaj tshuaj lom, tsis muaj ntxhiab, tsis yaj hauv dej thiab ethanol, muaj zog adsorption rau fluorine, feem ntau yog siv rau kev tshem tawm fluoride ntawm cov dej haus hauv thaj chaw muaj fluorine ntau.
Alumina ua kom muaj peev xwm xaiv tau nqus dej los ntawm cov pa roj, cov pa dej thiab qee yam kua. Tom qab nqus tau tag, nws tuaj yeem rov ua dua los ntawm kev tshem tawm dej los ntawm kev ua kom sov li ntawm 175-315 ° C. Kev nqus thiab rov ua dua tuaj yeem ua tau ntau zaus. Ntxiv nrog rau kev siv ua desiccant, nws kuj tseem tuaj yeem nqus cov pa los ntawm cov pa oxygen, hydrogen, carbon dioxide, roj av thiab lwm yam ntawm cov roj lubricating. Nws kuj tseem siv ua catalyst thiab catalyst carrier thiab ua tus cab kuj rau kev tshuaj xyuas txheej xim.