Alumina hmoov yog lub ntsiab raw khoom ntawm dawb fused alumina grit thiab lwm yam abrasives, uas muaj cov yam ntxwv ntawm kub tsis kam, corrosion kuj thiab ruaj khov zog.Nano-alumina XZ-LY101 yog cov kua tsis muaj xim thiab pob tshab, uas yog dav siv los ua cov khoom siv hauv ntau yam acrylic resins, polyurethane resins, epoxy resins, thiab lwm yam. ntawm iav txheej cov ntaub ntawv, gemstones, precision ntsuas cov ntaub ntawv, thiab lwm yam .;thiab ntau hom alumina hmoov muaj kev siv sib txawv.Cov hauv qab no tsom rau kev qhia txog kev siv α, γ, thiab β-hom alumina hmoov.
1.a-alumina hmoov
Nyob rau hauv lub lattice ntawm α-hom alumina hmoov, cov pa oxygen ions nyob ze rau hauv cov duab hexagonal, Al3 + yog symmetrically faib nyob rau hauv lub octahedral coordination chaw ncig los ntawm cov pa ions, thiab lub lattice zog yog heev loj, yog li lub melting point thiab boiling point yog heev. siab.α-hom oxidation Aluminium yog insoluble hauv dej thiab kua qaub.Nws tseem hu ua aluminium oxide hauv kev lag luam.Nws yog cov khoom siv yooj yim rau kev ua hlau aluminium;nws kuj yog siv los ua ntau yam refractory cib, refractory crucibles, refractory kav, thiab kub siab sim ntsuas;Nws kuj tseem siv tau ua abrasive, nplaim retardant High-purity alpha alumina kuj yog cov khoom siv raw rau kev tsim cov khoom siv dag zog corundum, dag ruby thiab sapphire;nws kuj yog siv los tsim cov substrate ntawm niaj hnub loj-scale integrated circuits.
2. γ-alumina hmoov
γ-hom alumina yog aluminium hydroxide nyob rau hauv 140-150 ℃ low-temperature ib puag ncig lub cev qhuav dej, kev lag luam kuj hu ua active alumina, txhuas kua nplaum.Cov qauv ntawm cov pa oxygen ion approximation rau sab ntsug ntawm qhov chaw nyob ze, Al3 + irregularly faib nyob rau hauv cov pa oxygen ion puag ncig los ntawm octahedral thiab tetrahedral khoob.γ-hom alumina insoluble nyob rau hauv dej, yuav yaj nyob rau hauv muaj zog acid los yog muaj zog alkali tov, nws yuav rhuab mus rau 1200 ℃ tag nrho yuav hloov mus rau α-hom alumina.γ-hom alumina yog cov khoom ntxeem tau, thaj chaw sab hauv ntawm txhua gram mus txog ntau pua square metres, muaj peev xwm ua haujlwm siab adsorption.Cov khoom lag luam feem ntau yog xim tsis muaj xim lossis me ntsis pinkish cylindrical particle nrog zoo siab tsis kam.Hauv roj av refining thiab petrochemical kev lag luam feem ntau yog siv los ua adsorbent, catalyst thiab catalyst cab;nyob rau hauv kev lag luam yog transformer roj, turbine roj deacidification tus neeg saib xyuas, kuj siv rau xim txheej tsom xam;nyob rau hauv lub chaw soj nstuam yog ib tug nruab nrab muaj zog desiccant, nws qhuav muaj peev xwm yog tsis tsawg tshaj li phosphorus pentoxide, tom qab siv nyob rau hauv cov nram qab no 175 ℃ cua sov 6-8h kuj yuav regenerated thiab reused.
3.β-alumina hmoov
β-hom alumina hmoov kuj tseem hu ua active alumina hmoov.Activated alumina hmoov muaj zog txhua yam, muaj zog hygroscopicity, tsis o los yog tawg tom qab nqus dej, tsis muaj tshuaj lom, tsis muaj ntxhiab, insoluble nyob rau hauv dej thiab ethanol, muaj zog adsorption rau fluorine, feem ntau yog siv rau fluoride tshem tawm cov dej haus nyob rau hauv siab fluorine cheeb tsam. .
Activated alumina muaj peev xwm xaiv adsorb dej los ntawm gases, dej vapor thiab tej yam kua.Tom qab adsorption saturation, nws tuaj yeem rov qab los ntawm kev tshem dej los ntawm cua sov ntawm kwv yees.175-315 ° C.Adsorption thiab kev txhawb siab tuaj yeem ua tau ntau zaus.Ntxiv rau kev siv los ua cov khoom siv desiccant, nws tseem tuaj yeem adsorb vapor los ntawm cov pa paug paug, hydrogen, carbon dioxide, nkev roj thiab lwm yam ntawm cov roj lubricating.Nws kuj yog siv los ua catalyst thiab catalyst carrier thiab ua tus cab kuj rau kev tsom xam xim txheej.