Process for coating ceramic powder with alumina by sol-gel process and improved densification

摘要

The sol-gel process for forming dense alumina based cermics or dense ceramics with alumina as a sintering additive, the process comprising the steps of: preparing polymeric alumina sol by hydrolysis of Al (O-iBu)3 with a strong acid; preparing the ceramic dispersion in the alumina sol; gelling the dispersion; drying the gel dispersion to form a solid; calcining the solid; and sintering the calcined solid.