Sodium calcium silicon series fire-proofing glass

Abstract

A fire-proof Na-Si-Ca glass based on float glass contains SiO2 (67-75 Wt%), Al2O3 (1.5-4), CaO (5-10), MgO (0.5-3), R2O (3-13), ZrO2 (0.2-2.5), BaO (2-6) and SrO (1-6). Its advantages are low thermal expansibility and high softening point, fire-proofing performance and chemical stability.

Description

technical field [0001] The invention belongs to the technical field of glass production and manufacturing, and mainly relates to a soda-calcium-silicon series fireproof glass which is applicable to the production process of common float glass. Background technique [0002] The known composite fire-resistant glass is made of borosilicate glass or tempered ordinary sodium-lime-silicate glass as a substrate, which is compounded with organic or inorganic materials. The expansion and softening temperature of ordinary sodium-lime-silicate glass is generally lower than 650°C. When the fire is baked at a fire site higher than 650°C, the glass on the contact surface with the fire often shortens the fire resistance time of the composite fireproof glass due to softening and deformation. Salt glass or tempered ordinary sodium-lime-silicate glass cannot be used as a single piece of fireproof glass because the expansion and softening temperature is lower than 650 ° C. It can only be used ...

AI Technical Summary

Problems solved by technology

Salt glass or tempered ordinary sodium-lime-silicate glass cannot be used as a single piece of fireproof glass because the expansion and softening temperature is lower than 650 ° C. It can only be used as the substrate of composite fireproof glass. Not only the weight per unit area Large, inconvenient for transportation and mass production, and not resistant to ultraviolet light, poor aging performance

Low-expansion borosilicate monolithic fireproof glass is a monolithic fireproof glass formed at one time, with light weight and high softening point, but high melting temperature, and because of boron content, special glass furnace structure and special refractory materials are required for production. High cost and complex process

Domestic physical-chemical tempered single-piece fire-resistant glass usually uses ordinary soda-lime-silicon float glass. In a specific tempering furnace, chemical tempering reagents are sprayed to improve the strength of the glass itself through physical-chemical tempering. For the purpose of fire prevention, the thermal expansion coefficient and softening point of the glass itself have not changed, and it cannot pass the fire prevention time required by the international fireproof glass standard