Preparation method for tempered vacuum glass

Abstract

The invention discloses a preparation method for tempered vacuum glass. The preparation method mainly comprises the following steps: (1) placing a support on glass having undergone pretreatment and drying; (2) spraying or impregnating the surface of the glass with a layer of a chemical solution; and (3) laminating two pieces of the glass sprayed or impregnated with the chemical solution on a platform, carrying out edge sealing after lamination, then flatwise placing the laminated glass in a heating furnace for dry heating at a temperature of 850 and 920 DEG C for 6 to 10 hours, carrying out exhausting, vacuum pumping, edge sealing and sealing during heating, then carrying out cooling, and taking out the laminated glass out of the furnace. With the preparation method of the invention, highcrushing stress is formed on the surface layers of the laminated glass, small tensile stress is formed in the laminated glass, a compact layer with strong crushing stress is generated on the surface of the laminated glass, and surface stress is enhanced. Therefore, glass manufacturing cost is greatly reduced; the heating frequency and thermal damage of the glass are reduced; the strength and the service life of the glass are improved; and the preparation method has the advantages of simple process, low cost and the like.

Description

technical field [0001] The invention relates to the technical field of vacuum glass preparation, in particular to a preparation method of tempered vacuum glass. Background technique [0002] In the past ten years, the demand for thermal insulation, energy saving and sound insulation of buildings has promoted the development of vacuum glass production technology. Most existing vacuum glass manufacturing methods are to support and isolate two layers of flat tempered glass, seal the circumference to form a cavity, and obtain a vacuum cavity through steps such as sintering, vacuuming, and sealing. Due to the elimination of gas conduction and convection, vacuum glass has excellent heat insulation and sound insulation properties. It has become a subject of people's research while being widely used. At present, dozens of new utility and invention patents for vacuum glass have been disclosed in China. . For a long time, vacuum glass has been made of ordinary flat tempered glass, w...

AI Technical Summary

Problems solved by technology

But at present, according to the requirements of the sealing process, it is necessary to keep the temperature at the highest temperature for a certain period of time, so that the sealing material can fully melt and flow, and obtain higher sealing strength and airtightness, then in the process of melting the low melting point glass powder , the long-term high temperature of tempered glass will cause severe annealing of tempered glass, causing stress decay, thus losing the safety characteristics of tempered glass

At the same time, the existing tempered glass generally has a certain degree of stress bending, which directly affects the edge sealing quality of vacuum glass.