Thermal Stability Transparent Glass Tube Pure And Bright

Variety of glass materials, superior performance and good quality, not only can be used as decoration, but also durable and versatile. Glass partitions and car windows must be made of glass. Smooth and flat, pure and bright, all walks of life want it. Glass is now a more popular decoration material, and it is used in architectural interior decoration and outdoor glass curtain walls.

Alkaline earth metal oxide raw materials: CaO, MgO, BaO, ZnO, PbO raw materials. Adding CaO and MgO to the glass can reduce the tendency of soda silica glass to crystallize and enhance the chemical stability. It can reduce the viscosity of the glass at high temperature and promote the melting and clarification of the glass. However, the viscosity increases rapidly when the temperature is reduced, and the forming operation is difficult. The cited raw materials are limestone (CaCO3) and chalcogenite (MgCO3), or dolomite containing both CaO and MgO. BaO and ZnO are often added to glass to adjust the chemical stability and refractive index of the glass. The raw materials used are often industrial ZnO and BaCO3, BaSO4 or Ba(NO3)2. The addition of PbO to the glass can significantly increase the refractive index and dispersion, and make the glass absorb short-wavelength rays. At the same time, the specific gravity is increased, the melting temperature is lowered, and the wettability with metals is good. The cited raw materials of PbO are red lead and yellow lead or industrial lead nitrate.