——
NEWS
What is the difference between quartz glass and crystal?
release time:
2021-11-12
Except for hydrofluoric acid, quartz glass hardly reacts with other acids. Its acid resistance is 30 times that of ceramics and 150 times that of stainless steel. Especially its chemical stability at high temperature is unmatched by any other engineering material.
Quartz has the following characteristics:
High temperature resistance
The softening point temperature of quartz glass is about 1730 ℃, which can be used for a long time at 1100 ℃, and the temperature for a short time can reach 1450 ℃
Good light transmittance
Quartz glass has good light transmittance in the whole spectral band from ultraviolet to infrared. The transmittance of visible light is more than 95, especially in the ultraviolet spectral region, and the transmittance can reach more than 80.
Good thermal stability
The thermal expansion coefficient of quartz glass is small, and it can withstand severe temperature changes. When the quartz glass is heated to about 1100 ℃, it will not crack when put into normal temperature water.
Corrosion resistance
Except for hydrofluoric acid, quartz glass hardly reacts with other acids. Its acid resistance is 30 times that of ceramics and 150 times that of stainless steel. Especially its chemical stability at high temperature is unmatched by any other engineering material.
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 temperatures. Due to the above excellent physical and chemical properties, quartz glass is widely used in electric light source, semiconductor, optical communication, military industry, metallurgy, building materials, chemistry, machinery, power, environmental protection and other fields.
Composition difference between quartz glass and crystal
Silica is the main component of quartz glass and crystal, but it is not exactly the same.
Quartz glass is made by melting various pure natural quartz (such as crystal, quartz sand, etc.). The linear expansion coefficient is small, which is 1/10-1/20 of ordinary glass, and has good thermal shock resistance. Quartz glass is an amorphous material with a single component of silica. Its microstructure is a simple network composed of tetrahedral structure units of silica. Because of the large chemical bond energy of Si-O and the compact structure, quartz glass has unique properties.
Related news