Upfu hweAlumina ndiyo chinhu chikuru chakagadzirwa nejena rakasanganiswa alumina grit nezvimwe zvinobvisa ruvara, izvo zvine hunhu hwekudzivirira kupisa kwakanyanya, kudzivirira ngura uye hunhu hwakagadzikana. Nano-alumina XZ-LY101 imvura isina ruvara uye yakajeka, inoshandiswa zvakanyanya sekuwedzera mune akasiyana ma acrylic resins, polyurethane resins, epoxy resins, nezvimwewo. Inogonawo kuva solvent inobva mumvura kana mafuta, uye inogona kuputirwa pazvinhu zvekufukidza zvegirazi, matombo anokosha, zvinhu zvekushandisa zvakanyatsonaka, nezvimwewo; uye mhando dzakasiyana dzeupfu hwealumina dzine mashandisirwo akasiyana. Izvi zvinotevera zvinotarisa pakushandisa α, γ, uye β-type alumina powder.
1.α-alumina upfu
Mu lattice ye α-type alumina powder, ma oxygen ions akanyatsoiswa muchimiro che hexagonal, Al3+ inogoverwa zvakaenzana munzvimbo ye octahedral coordination centre yakakomberedzwa nema oxygen ions, uye lattice energy yakakura kwazvo, saka melting point ne boiling point zvakakwirira kwazvo. α-type oxidation Aluminium hainyungudike mumvura ne acid. Inonziwo aluminum oxide muindasitiri. Ndiyo simbi inoshandiswa kugadzira simbi aluminum; inoshandiswawo kugadzira zvidhinha zvakasiyana-siyana zvinodzivisa kupenya, ma refractory crucibles, mapombi anodzivisa kupenya, uye zvishandiso zvekuyedza zvinopisa zvakanyanya; inogona zvakare kushandiswa se abrasive, fire retardant High-purity alpha alumina zvakare ndiyo mbesa yekugadzira artificial corundum, artificial ruby uye sapphire; inoshandiswawo kugadzira substrate yema circuits makuru akabatanidzwa emazuva ano.
2. upfu hweγ-alumina
Alumina yemhando yeγ ialuminium hydroxide mu 140-150 ℃ ine low-temperature environment system, indasitiri inonziwo active alumina, aluminum glue. Maumbirwo eoxygen ion approximation yerutivi rwepakati rwakanyatsorongwa, Al3 + yakapararira zvisina kurongeka mu oxygen ion yakakomberedzwa ne octahedral uye tetrahedral gaps. Alumina yemhando yeγ isinganyungudike mumvura, inogona kunyungudutswa mu strong acid kana strong alkali solution, ichapiswa kusvika 1200 ℃ yese ichashandurwa kuita α-type alumina. Alumina yemhando yeγ ichinhu chine maburi, nzvimbo yemukati yegiramu yega yega inosvika mazana emamita emativi, ine activity high adsorption capacity. Chigadzirwa chemaindasitiri chinowanzova chisina ruvara kana kuti chine cylindrical particle isina pinkish ine resistance yakanaka yekumanikidzwa. Mu petroleum refinement uye petrochemical inowanzoshandiswa se adsorbent, catalyst uye catalyst carrier; muindasitiri mune transformer oil, turbine oil deacidification agent, inoshandiswawo pakuongorora mavara; Murabhoritari mune desiccant ine simba rakasimba, kugona kwayo kuomesa hakuna kuderera pane phosphorus pentoxide, mushure mekushandiswa mukupisa kwe175 ℃ kunotevera kwemaawa 6-8 kunogona zvakare kugadzirwazve uye kushandiswazve.
3.β-alumina upfu
Upfu hwealumina hwemhando yeβ hunogonawo kunzi upfu hwealumina hunoshanda. Upfu hwealumina hunoshanda hune simba guru remuchina, hune hygroscopicity yakasimba, hauzvimbi kana kutsemuka mushure mekunwa mvura, hauna chepfu, haunhuwi, haunyungudike mumvura uye mune ethanol, hune fluorine inonyungudika zvakanyanya, inonyanya kushandiswa kubvisa fluoride mumvura yekunwa munzvimbo dzine fluorine yakawanda.
Alumina yakabatidzwa ine simba rekusarudza kusveta mvura kubva mumagasi, mvura inofefetera uye zvimwe zvinwiwa. Mushure mekusveta mvura, inogona kusvetwazve nekubvisa mvura nekudziisa paanenge 175-315°C. Kusvetwa uye kumutswazve kunogona kuitwa kakawanda. Pamusoro pekushandiswa semushonga wekubvisa mvura, inogonawo kusveta utsi kubva muokisijeni yakasviba, hydrogen, carbon dioxide, gasi rechisikigo nezvimwewo zvemafuta anozora. Inoshandiswawo semushonga wekubvisa mvura uye muchina wekubvisa mvura uye semuchina wekuongorora mavara.