Preparing method for water-proof fused silica ceramics

Abstract

The invention discloses a preparing method for water-proof fused silica ceramics and the method comprises the following steps of 1, combining lithium carbonate, calcium carbonate, aluminium hydroxide, zirconium oxide, zinc oxide together, smelting the mixture and obtaining vitreous humour; 2, obtaining the solid glass after carrying out water quenching on the vitreous humour obtained from step one, and then grinding the solid glass into finely-crushed glass powder less than 10 microns; 3, combining and stirring evenly terpineol, absolute ethyl and Primary Alcobol Ethoxylate,to obtain a mixed liquor, pouring the finely-crushed glass powder obtained in step 2 into the mixed liquor to obtain vitreous glaze pulp, dispersing evenly the pulp; 4, coating evenly the vitreous glaze pulp obtained in step 3 on the surface of fine fused silica ceramics, carrying out sintering and heat setting on the coated fine fused silica ceramics, finally obtaining the water-proof fine fused silica ceramics after the ceramics cools down. Waterproof microcrystalline glass coating obtained form the invention has multiple excellent performances such as small thermal expansivity, good thermal shock resistance, high temperature resistance, high intensity, and the like, and is capable of obviously extending the serving life of the fine fused silica ceramics under tough environment.

Description

technical field [0001] The invention belongs to the field of ceramic processing, and in particular relates to a preparation method of a waterproof fused silica ceramic product. Background technique [0002] Fused silica ceramic materials have small thermal expansion coefficient, low thermal conductivity, excellent thermal shock resistance, low dielectric constant and loss, and are widely used in aerospace, military and other important fields. The fused silica ceramic material has a relatively high porosity and is hydrophilic, so it is very easy to absorb moisture and absorb water. The dielectric constant and dielectric loss of rainwater are very large, and the dielectric constant and dielectric loss of fused silica ceramic materials will increase correspondingly after absorbing moisture, which seriously affects the wave transmission performance of the material. Under the working conditions of many complex environments, there will be rain erosion, thermal shock, and even ero...

AI Technical Summary

Problems solved by technology

All there are the problems of complex process and low reliability in the above-mentioned technical methods