... so the specific surface is large. It can be used as absorbent, desiccant and catalyst carrier. It is also a kind of trace water ... to the absorbed molecule polarization,the attachment force is strong for water ,oxide,acetic acid,alkali ect.Activated alumina defluorinates just ... is stable. It has high strength, low abrasion, no soften in water, no expansion, no powdery no crack.It can widely used in ...