Ufa wa alumina ndiye chinthu chachikulu chomwe chimagwiritsidwa ntchito popanga grit yoyera yosakanikirana ya alumina ndi zinthu zina zoyambira, zomwe zimakhala ndi kukana kutentha kwambiri, kukana dzimbiri komanso mphamvu zokhazikika. Nano-alumina XZ-LY101 ndi madzi opanda mtundu komanso owonekera bwino, omwe amagwiritsidwa ntchito kwambiri ngati zowonjezera mu ma resins osiyanasiyana a acrylic, ma resins a polyurethane, ma resins a epoxy, ndi zina zotero. Ikhozanso kukhala chosungunulira chochokera m'madzi kapena mafuta, ndipo imatha kuphimbidwa ndi zinthu zokutira galasi, miyala yamtengo wapatali, zida zolondola, ndi zina zotero; ndipo mitundu yosiyanasiyana ya ufa wa alumina imagwiritsa ntchito mosiyanasiyana. Izi zikuyang'ana kwambiri pakuyambitsa kugwiritsa ntchito ufa wa alumina wa α, γ, ndi β-type.
1.α-alumina ufa
Mu lattice ya ufa wa alumina wa α-type, ma ayoni a okosijeni amadzazidwa bwino mu mawonekedwe a hexagonal, Al3+ imagawidwa mofanana mu octahedral coordination center yozunguliridwa ndi ma ayoni a okosijeni, ndipo mphamvu ya lattice ndi yayikulu kwambiri, kotero malo osungunuka ndi malo owira ndi okwera kwambiri. α-type oxidation Aluminium sisungunuka m'madzi ndi asidi. Imatchedwanso aluminiyamu oxide mumakampani. Ndi chinthu chofunikira popanga aluminiyamu yachitsulo; imagwiritsidwanso ntchito popanga njerwa zosiyanasiyana zotsutsa, zophimba zotsutsa, mapaipi otsutsa, ndi zida zoyesera kutentha kwambiri; ingagwiritsidwenso ntchito ngati abrasive, yoletsa moto. Alfa alumina yoyera kwambiri ndi chinthu chopangira corundum yopangira, ruby yopangira ndi safiro; imagwiritsidwanso ntchito popanga substrate ya mabwalo akuluakulu amakono.
2. ufa wa γ-alumina
Alumina ya mtundu wa γ ndi aluminiyamu hydroxide mu 140-150 ℃, yomwe imayikidwa mu dongosolo lochepa la madzi m'malo otenthetsera, mafakitale amatchedwanso alumina yogwira ntchito, guluu wa aluminiyamu. Kapangidwe ka oxygen ion pafupifupi mbali yoyimirira ya pakati, Al3 + yogawidwa mosakhazikika mu oxygen ion yozunguliridwa ndi mipata ya octahedral ndi tetrahedral. Alumina ya mtundu wa γ yosasungunuka m'madzi, imatha kusungunuka mu asidi wamphamvu kapena yankho lamphamvu la alkali, idzatenthedwa mpaka 1200 ℃ yonse idzasinthidwa kukhala alumina ya mtundu wa α. Alumina ya mtundu wa γ ndi chinthu chokhala ndi mapokoso, dera lamkati la gramu iliyonse mpaka mamita mazana ambiri, mphamvu yayikulu yotsatsira. Chogulitsachi nthawi zambiri chimakhala chopanda utoto kapena chozungulira pang'ono chokhala ndi kukana kwabwino kwa kupanikizika. Mu mafuta oyenga ndi mafakitale a petrochemical nthawi zambiri amagwiritsidwa ntchito ngati adsorbent, catalyst ndi catalyst; mumakampani ndi mafuta osinthira, turbine oil deacidification agent, omwe amagwiritsidwanso ntchito poyesa mitundu; Mu labotale muli desiccant yolimba yopanda mbali, mphamvu yake youma ndi yosachepera phosphorous pentoxide, ikagwiritsidwa ntchito kutentha kwa 175 ℃ kwa maola 6-8, imatha kubwezeretsedwanso ndikugwiritsidwanso ntchito.
3.β-alumina ufa
Ufa wa alumina wa mtundu wa β ungatchedwenso kuti ufa wa alumina wogwira ntchito. Ufa wa alumina wogwiritsidwa ntchito uli ndi mphamvu zambiri zamakaniko, uli ndi hygroscopicity yamphamvu, sutupa kapena kusweka ukatha kuyamwa madzi, suli ndi poizoni, sununkha, susungunuka m'madzi ndi ethanol, umakhala ndi mayamwidwe amphamvu a fluorine, womwe umagwiritsidwa ntchito kwambiri pochotsa fluoride m'madzi akumwa m'malo okhala ndi fluoride yambiri.
Alumina yogwiritsidwa ntchito imatha kuyamwa madzi kuchokera ku mpweya, nthunzi ya madzi ndi zakumwa zina. Pambuyo poyamwa madzi, imatha kubwezeretsedwanso mwa kuchotsa madzi powatentha pa kutentha kwa pafupifupi 175-315°C. Kuyamwa ndi kubwezeretsanso madzi kumatha kuchitika kangapo. Kuwonjezera pa kugwiritsidwa ntchito ngati desiccant, imathanso kuyamwa nthunzi kuchokera ku mpweya woipa, haidrojeni, carbon dioxide, mpweya wachilengedwe ndi zina zotero za mafuta opaka. Imagwiritsidwanso ntchito ngati chothandizira komanso chonyamulira madzi komanso ngati chonyamulira madzi chowunikira mitundu.