Coating preparation method for flaky zirconium oxide ceramic

Abstract

The invention provides a coating preparation method for flaky zirconium oxide ceramic. According to the method, 60 to 65 mass percent of zirconium oxide ceramic powder, 20 to 25 mass percent of organic solvent, 1.2 to 1.8 mass percent of dispersant, 4.0 to 6.0 mass percent of adhesive, and 2.5 to 7.0 mass percent of plasticizer are provided. The organic solvent is a binary azeotropic mixed organic solvent system such as butanone and ethanol; the dispersant comprises fish oil and oleic acid; the adhesive comprises two kinds of different polyvinyl butyral (PVB) with long and short molecular chains; and the plasticizer comprises polyethylene glycol (PEG) and dibutyl phthalate (DBP). The flaky zirconium oxide ceramic prepared by adopting the method is high in flatness and surface quality and low in thickness fluctuation, and can meet the quality requirement of subsequent processing.

Description

technical field

[0001] The invention relates to the technical fields of functional ceramics and electronic ceramics, in particular to a coating preparation method of flaky zirconia ceramics. Background technique

[0002] Flaky 3Y zirconia ceramics are mainly used to make flaky cutters, seals, ceramic supports, etc. 5Y zirconia ceramics are used to make flaky oxygen sensors, which are widely used in automobile exhaust or other fields that need to detect oxygen content. 8Y zirconia Ceramics are mainly used in new energy sources, such as the preparation of solid electrolyte sheets for fuel cells. Since the current molding process for making flaky zirconia ceramics is mainly dry pressing, isostatic pressing, injection molding or gel injection molding, most of the non-water-based molding processes use a single dispersant, a single binder and a single plasticizer. Due to the traditional molding method, the density of the green body is not uniform in all directions after molding,...

Images