Alumina ufa ndi α-mtundu alumina powaer
Makhalidwe asanu a ufa wapamwamba wa alumina ufa
1. Kukana mankhwala;
2. Aluminium yoyera kwambiri, zomwe zili ndi alumina ndizoposa 99%;
3. High kutentha kukana, ntchito yachibadwa pa 1600 ℃, yochepa 1800 ℃;
4. Kulimbana ndi kuzizira kwadzidzidzi ndi kutentha, kosavuta kuphulika;
5. Imatengera grouting ndipo imakhala ndi kachulukidwe kakang'ono.
1. Kugwiritsa ntchito α-mtundu wa alumina ufa
Mu crystal lattice ya α-type alumina ufa, ma ion okosijeni amakhala odzaza ndi ma hexagon, ndipo Al3 + imagawidwa mofananira mu octahedral coordination center yozunguliridwa ndi ayoni okosijeni.Mphamvu ya lattice ndi yaikulu kwambiri, kotero kuti malo osungunuka ndi malo otentha ndi apamwamba kwambiri.α-mtundu wa okosijeni Aluminiyamu sasungunuka m'madzi ndi asidi.Amatchedwanso aluminium oxide m'makampani.Ndiwofunika zopangira zopangira zitsulo zotayidwa;amagwiritsidwanso ntchito popanga njerwa zosiyanasiyana zokanira, ziboliboli zokanira, machubu okanira, ndi zida zoyesera kutentha kwambiri;itha kugwiritsidwanso ntchito ngati abrasives ndi retardants lawi.Agents, fillers, etc.;alumina yoyera kwambiri yamtundu wa α ndiyenso zopangira zopangira corundum, ruby yopanga ndi safiro;imagwiritsidwanso ntchito popanga mabwalo amakono akuluakulu ophatikizika.
Aluminium activated imakhala ndi mwayi wosankha wa gasi, nthunzi wamadzi ndi chinyezi china chamadzimadzi.Pambuyo pakudzaza, imatha kutsitsimutsidwa ndi kutentha pafupifupi 175-315 ° C kuti ichotse madzi.Adsorption ndi chiukitsiro zitha kuchitidwa kangapo.Kuwonjezera pa kugwiritsidwa ntchito ngati desiccant, imathanso kutulutsa mpweya wa mafuta odzola kuchokera ku mpweya woipa, hydrogen, carbon dioxide, gasi wachilengedwe, ndi zina zotero.
