Automatic glaze spraying technology for electronic vacuum metallized ceramic surface

Abstract

The invention relates to an automatic glaze spraying technology for an electronic vacuum metallized ceramic surface, which has the key points of filtering raw glaze slip by a 200-mesh screen to remove iron; stirring and mixing 2-20% of suspending agent, 0-0.3% of water glass and 0-0.4% of sodium polyacrylate to form glaze slip additive; adding the glaze slip additive into 79.3-98% of glaze slip which is treated by deironing, and stirring to prepare glaze slip spraying agent with 50-70 o Be and the moisture content of 30-45%; setting the operating parameters of a glaze spraying machine, and spraying glaze for 4-10 times; and naturally drying for 1-2h at the room temperature. The automatic glaze spraying technology is simple in glaze spraying technology, and the prepared glaze slip spraying agent is proper in fluidity on the surface of a workpiece; the technology is convenient to operate and control; the glaze slip sprayed on the surface of the workpiece is good in compactness and smoothness; a glaze layer stuck on the surface of the workpiece is even in thickness; the produced metallized ceramic can be welded with metal, so that a composite ceramic part with firm connection, good air tightness, reliable quality and stable performances can be formed; and product quality and production efficiency are improved, and the production cost and energy consumption are reduced.

Description

technical field [0001] The invention relates to a glaze spraying process, in particular to an automatic glaze spraying process for vacuum electronic metallized ceramic surfaces. Background technique [0002] General ceramics: The entire porcelain body needs to be glazed, and the glaze is applied on the green body with high water absorption rate before the porcelain is fired, and the vacuum electronic metallized ceramics is a key structural component of the vacuum interrupter, and the sintering temperature is high. The dimensional tolerance is required to be small, and the sintered ceramics need to be machined according to the drawings in the follow-up. Glazing can only be applied after the semi-finished ceramics have been processed to pass the dimensions and cleaned. And it is required to have glaze in a certain area of ​​the outer surface of the product, and the outer surface is within a certain distance from both ends (generally about 2mm) and the inner wall is not allowed...

AI Technical Summary

Problems solved by technology

Thermal spraying is to spray the glaze on the heated porcelain parts. The heat of the porcelain body volatilizes the water in the glaze sprayed on the porcelain body so that the glaze powder can adhere to the porcelain body. The difference in height causes defects such as orange peel, flow glaze, wrinkling and uneven thickness of the glaze layer. Not only is it difficult to control in the production operation, but also consumes a lot of heat energy. 0.8~1.6μm), the water absorption rate is less than 0.3%, the water volatilization of the glaze is very slow at room temperature, and it is not easy to adhere to the glaze slurry, causing defects such as flow glaze and uneven thickness of the glaze layer