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氧化铝(Alumina)是同铝土矿和其他含铝原料经焙烧后制得。生产中有a、b两种焙烧方法,最终产物均为α型氧化铝。在焙烧过程中,由于温度的变化可产生γ、η、χ等多种“过渡相”或称“中间型氧化铝”。γ型氧化铝表面积大,孔隙粗,吸水性强;α型氧化铝吸水差,稳定性好,惰性强,但不同温度下
Alumina is made with bauxite and other aluminum-containing raw materials after firing. Production has a, b two roasting methods, the final product is α-type alumina. During the calcination process, a variety of “transitional phases” or “intermediate aluminas” such as γ, η and χ can be produced due to the temperature changes. γ-alumina surface area, coarse pores, strong water absorption; α-alumina poor water absorption, good stability, inertness, but at different temperatures