Low-expansion heat-resisting fire-retardant glass

Abstract

The invention provides a low expansion heat-resistant and fireproof glass, which comprises (by weight percent) SiO2 75-85%, B2O3 8-19%, Al2O3 1-5%, Na2O 2-5.5%, K2O 0-3%, Zr02 0-3%, ZnO 0-3%, MgO 0-3.5%, CaO 0-4%.

Description

technical field [0001] The invention belongs to the technical field of glass production and manufacture, and mainly relates to a borosilicate series heat-resistant fireproof glass with low expansion coefficient and high chemical stability. Background technique [0002] Known fireproof glass is generally divided into three types: composite fireproof glass, microcrystalline fireproof glass and single piece fireproof glass. Composite fire-resistant glass is made of more than two pieces of ordinary soda-lime-silica glass into interlayer, wire or insulating glass, which has a good effect in preventing the spread of open flames and heat insulation. It is easy to burst and deform, and the weight per unit area of ​​the product is relatively large, which causes a lot of inconvenience to production and transportation. It is also easy to foam after being exposed to light, has poor light transmittance, and poor anti-aging performance. The glass-ceramic fireproof glass is made by adding...

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Problems solved by technology

This kind of glass has good chemical stability and mechanical properties, high mechanical strength, high flexural and compressive strength, high softening temperature, and small thermal expansion coefficient. The process cannot be continuously produced, and the float process cannot be used for one-time molding, and the flatness of the glass surface is lower than that of float glass

The existing domestic single-piece fire-resistant glass refers to chemical and physical tempered glass. This type of glass is stronger than ordinary tempered glass, but its glass performance is the same as that of ordinary float glass, and it cannot meet the fire-proof requirements in the true sense.

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