Gel casting method of aluminum oxide-zirconium dioxide composite ceramic

Abstract

The invention belongs to the field of ceramics, and particularly relates to a gel casting method of aluminum oxide-zirconium dioxide composite ceramics, which comprises the following steps: adding aluminum chloride into absolute ethyl alcohol, uniformly stirring, adding zirconium oxychloride, and carrying out low-temperature ultrasonic dispersion to form a mixed solution; adding ethyl cellulose into the mixed solution to be subjected to ultrasonic dispersion for 2-4 h, and obtaining a dispersed alcohol solution; blending ammonia gas and water vapor to form a mixed gas, slowly introducing the mixed gas into the dispersed alcohol liquid until no precipitate is generated, so as to obtain a suspended dispersion liquid, and then carrying out reduced pressure distillation for 3-6 hours, so as toobtain viscous slurry; and injecting the viscous slurry into a mold, carrying out a constant-temperature and constant-pressure reaction to form a dry material, carrying out a constant-temperature andconstant-pressure reaction in an illumination system for 2-4 h, and sintering in a muffle furnace for 6-10 h to obtain the alumina-zirconium dioxide composite ceramic. The problem that the ceramic prepared by the existing gel casting process is easy to peel off is solved, ethyl cellulose is used as an adhesive, light degradation in the pressing process is realized while viscosity is realized, andpore forming of organic matters in the sintering process is prevented.

Description

technical field [0001] The invention belongs to the field of ceramics, and in particular relates to a gel injection molding method for alumina-zirconia composite ceramics. Background technique [0002] Gel injection molding is a new molding technology for complex shaped ceramic products developed in recent years, which has attracted widespread attention. Briefly, the technique consists of three basic steps. First, a water-soluble organic monomer is used as a cross-linking medium to prepare a ceramic slurry with high solid content and low viscosity; then the slurry is injected into a mold and fully cured; finally, the green body is demoulded, dried and sintered. Compared with the traditional molding process, gel injection molding technology has many advantages, such as near-net size molding, products with complex shapes, simple operation, and good mechanical properties of the green body. [0003] Many organic substances that can produce crosslinking can be used for gel inje...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a gel injection molding method for alumina-zirconia composite ceramics, which solves the problem that the ceramics prepared by the existing gel injection molding process are easy to peel off. As a binder, it achieves viscosity while photodegrading during the pressing process, preventing organic matter from causing pores during the sintering process