Study on Preparation of Quartz Ceramics Toughened with Mineralizer

Abstract

Quartz ceramics have excellent properties such as low thermal conductivity, low expansion coefficient, high temperature resistance and thermal stability, but low toughness. The quenching method of quartz ceramic is as follows: (1) A hard phase is formed in the quartz ceramic. (2) Improve the surface coating. (3) Short fiber reinforcement. (4) The graphite particles are dispersed and quenched. (5) Have silicone resin reinforcer. (6) Improve mineralizers. In order to improve the toughness of quartz ceramics, a hardening mineralizer is selected in this experiment. In this experiment, quartz is used as the main raw material, and a mineralizer is selected as the aluminate, feldspar and Al2O3 powder cement. Quartz ceramics are prepared by molding. Adding 10% Al2O3 powder, adding Al2O3 powder can improve the flexural strength of quartz ceramics, and the flexural strength of quartz ceramics can reach 10 MPa. SEM analysis shows that the addition of Al2O3 can inhibit the grain boundary motion speed better and prevent grain growth, enhancement and enhancement. XRD analysis shows that the addition of aluminate cement, feldspar and calcium oxide may be beneficial to the conversion of quartz to cristobalite and the addition of Al2O3 to the conversion of quartz to phosphorus quartz.