Methods of passivacao of AIN in relation to hydrolyse, colloidal processing of ceramicos base of AIN in aqueous medium and granulacao pos from dessassuspensoes

摘要

The passivation method is for aluminum nitride in particle form relative to hydrolysis reactions spontaneously occurring when the material is in contact with water in vapor or liquid form. A method is also involved for preparing aqueous suspensions based on stable and very concentrated aluminum nitride with rheological properties adequate for formulation processes of voluminous ceramic bodies or substrates by colloidal techniques. The aqueous suspensions are also adequate for powder granulation processes by spray drying or by freeze drying, having excellent properties for formulation technologies using dry pressing.