Micro-wave sintering method for foam glass

Abstract

A microwave sintering method of foam glass comprises the following steps of: placing a foam glass blank into a microwave sintering device with oxidizing atmosphere or neutral atmosphere and microwave frequency of 300MHz-300GHz, heating up to 300-350 DEG C in 5 min, keeping at the temperature for 10 min, heating up to 750-820 DEG C in 20-45 min, keeping at the temperature for 15-40 min, turning off microwave source, rapidly cooling to 600 DEC G in 5 min, keeping at the temperature for 20 min, cooling to room temperature, and taking out. In the inventive method, the heat for microwave sintering is originated from inside, the foam glass blank is self-sintered by absorbing microwave, the internal and external temperature difference of the foam glass blank is small during sintering process, so as to uniformly sinter the foam glass blank, reduce sintering temperature, shorten sintering time, and improve sintering quality. The used temperature is 5-150 DEG C lower than conventional sintering temperature.

Description

technical field [0001] The invention relates to a preparation method of foam glass, in particular to a microwave sintering method of foam glass, belonging to a new foam glass sintering process. Background technique [0002] Foam glass is a new type of environmentally friendly building material with superior performance in heat insulation, sound absorption, moisture resistance, waterproof and light weight. The traditional sintering of foam glass is to heat the glass body through heat radiation and air convection, but due to the uneven heat radiation and the small air convection in the gaps in the foam glass body, the inside and outside of the foam glass body during the sintering process The large temperature difference leads to the problem of poor sintered foaming quality. [0003] Microwave sintering, as an efficient heating method, has the advantages of wide application range, high energy utilization rate, no pollution, and simultaneous internal and external sintering. For...

AI Technical Summary

Problems solved by technology

The traditional sintering of foam glass is to heat the glass body through heat radiation and air convection, but due to the uneven heat radiation and the small air convection in the gaps in the foam glass body, the inside and outside of the foam glass body during the sintering process The large temperature difference leads to the problem of poor sintering and foaming quality

[0003] Microwave sintering, as an efficient heating method, has the advantages of wide application range, high energy utilization rate, no pollution, and simultaneous internal and external sintering. For example, it is used for sintering of foam glass body to solve its uneven sintering and poor foaming quality. , low thermal efficiency and other issues, it will be a good way