[Copy] The difference between high borosilicate and ordinary glass

High silica glass is actually a kind of glass material with low expansion rate, very high temperature resistance, high heat resistance, high strength, high hardness and high chemical stability. The main difference between it and ordinary glass is as follows.

1. The thermal expansion coefficient of high borosilicate glass is very low, which is only one third of that of ordinary glass. And this difference can reduce the influence caused by temperature gradient, and also has a stronger resistance to fracture. Therefore, the thermal expansion coefficient of borosilicate glass is different from that of ordinary glass.

2. The main components of borosilicate glass are actually boron trioxide and silicon dioxide. In the production process of ordinary silicate glass, water glass sand, soda water and ground lime are also added. Boron is generally not added.

3. The boron and silicon materials used in high borosilicate glass actually replace a large number of harmful heavy metal ions in raw glass, thereby improving the impact resistance of glass to cold and heat. Therefore, the cold resistance of high borosilicate glass and ordinary glass is The ability to thermal shock is different.

4. The tensile strength of high borosilicate glass will be higher than that of ordinary glass, so its cracks will be relatively large, which is a unit fragmentation rather than the fragmentation of ordinary glass. Therefore, the tensile strength of borosilicate glass and ordinary glass is also different.