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The resistance of quartz glass is 10000 times that of ordinary glass
2021-08-20 17:35:40

Quartz glass has the properties of glass, but there is no other component except SiO2. The density is smaller than other glasses and feels lighter. The glass for glasses is a kind of optical glass with high refractive index (1.523). It is a silicate material. Its composition is: SiO2 70.6%, Na2O 11.1%, K2O 5.3%, Cao 11.9%, Sb2O3 0.6%, TiO2 0.6%. It is basically unified in most countries. High correction degree can be achieved only when the refractive index is large. The refractive index of quartz glass is only about 1.455. Usually, it can only be used as flat glasses.


quartz glass


Quartz glass is a special industrial technology glass made of silica. It is a very excellent basic material. Quartz glass has a series of excellent physical and chemical properties.

1. High temperature resistance. The softening point temperature of quartz glass is about 1730 ℃, which can be used at 1100 ℃ for a long time and 1450 ℃ for a short time.

2. Corrosion resistance. Except hydrofluoric acid, quartz glass hardly reacts with other acids. Its acid corrosion resistance is 30 times better than that of acid resistant ceramics and 150 times better than that of stainless steel. Especially, its chemical stability at high temperature is unmatched by any other engineering material.

3. Good thermal stability. The thermal expansion coefficient of quartz glass is small and can withstand drastic temperature changes. The quartz glass will not burst when heated to about 1100 ℃ and put into normal temperature water.

4. Good light transmittance. Quartz glass has good light transmission performance in the whole spectral band from ultraviolet to infrared, and the visible light transmittance is more than 92%, especially in the ultraviolet spectral region, the transmittance is more than 80%.

5. Good electrical insulation. The resistance of quartz glass is 10000 times that of ordinary glass. It is a good electrical insulating material and has good electrical properties even at high temperature. Another very important characteristic of quartz glass is that it can be made into high-purity materials. The metal impurity content of high-purity quartz glass is 20 * 10-6, and the metal impurity content of synthetic quartz glass is only 1 * 10-6. Quartz glass for optical communication and quartz glass for semiconductor industry use this characteristic.


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