TEMPERED GLASS

摘要

To provide tempered glass which is thin and can be produced by common air-quench tempering without requiring a special production facility, and untreated glass for such tempered glass. The tempered glass is obtainable via a heating step and a cooling step. The heating step is a step of applying heat treatment to glass to be treated, of which the glass transition point is from 500 to 600° C. and the maximum value of the thermal expansion coefficient (αmax) between the glass transition point and the yield point is at least 430×10−7/° C. The cooling step is a step of applying air-quenching treatment to the glass to be treated.

主权项

1. Tempered glass obtainable via a heating step of applying heat treatment to glass to be treated, of which the glass transition point is from 500 to 600° C. and the maximum value of the thermal expansion coefficient (αmax) between the glass transition point and the yield point is at least 430×10−7/° C., and a cooling step of applying air-quenching treatment to the glass to be treated.