In theory, quartz glass can be tempered. But the actual use of no quartzized glass. This is because quartz glass is difficult to steel, even if the effect of steel is also very very limited. The expansion coefficient of quartz glass is very small, only about 5.4 * 10-7, so quartz glass quenching and cooling performance is very good, even if the burning of more than 1000 degrees of glass suddenly into the cold water will not fry. It should be used for quartz glass to have a small expansion coefficient and is therefore used to measure other glass expansion coefficients.

The glass of steel and glass expansion coefficient has a great relationship, the use of steel is the use of cooling glass inside and outside the expansion of the volume changes and produce a strong internal stress. The use of glass within the uniform distribution of internal stress to improve the use of glass strength. Because the expansion coefficient of quartz glass is very small, so the ordinary steel technology in the quartz glass internal internal stress is minimal, can not achieve the role of enhanced glass strength.

Quartz glass softening point in more than 1700 degrees, want to use higher than ordinary tempering process temperature,ieve steel, the process is too difficult, as another way to improve the glass strength.