Glass is generally classified into oxide glass and non- […]
Glass is generally classified into oxide glass and non-oxide glass by main components. There are few types and quantities of non-oxide glasses in glass bottles, mainly chalcogenide glass and halide glass. The anion of chalcogenide glass is mostly sulfur, selenium, tellurium, etc. The glass bottle can cut off short-wavelength light and pass through yellow and red light, as well as near and far-infrared light, and its resistance is low, with switch and memory characteristics. The glass halide glass has a low refractive index and low dispersion, and is mostly used as an optical glass. The oxide glass is further classified into silicate glass, borate glass, phosphate glass, and the like. Silicate glass refers to glass whose basic component is SiO2.
It has many varieties and is widely used. According to the different contents of SiO2 in glass and alkaline earth metal oxide in glass bottles, it is divided into: 1 Quartz glass. SiO2 content is more than 99.5%, thermal expansion coefficient is low, high temperature resistance, good chemical stability, transparent UV light and infrared light, high melting temperature, high viscosity, and molding are difficult. It is widely used in semiconductors, electric light sources, glass bottle light guide communications, lasers and other optical and optical instruments. 2 high silica glass. The SiO2 content is about 96% and its properties are similar to that of quartz glass. 3 soda-lime glass. Mainly containing SiO2, it also contains 15% of Na2O and 16% of CaO.
The cost is low and it is easy to shape. The glass bottle is suitable for large-scale production, and its output accounts for 90% of the utility glass. Can produce glass jars, flat glass, utensils, light bulbs and so on. 4 lead silicate glass. The main components are SiO2 and PbO, which have unique high refractive index and high volume resistance, and have good wettability with metals. They can be used to manufacture light bulbs, vacuum tube columns, crystal glass vessels, and Flint optical glass. Lead glass containing a large amount of PbO can block X-rays and gamma rays. 5 aluminosilicate glass. With SiO2 and Al2O3 as the main components, the softening deformation temperature is high. It is used in making discharge bulbs, high-temperature glass thermometers, chemical combustion tubes, and glass fibers. 6 borosilicate glass.
With SiO2 and B2O3 as the main components, it has good heat resistance and chemical stability and is used to make cooking utensils, laboratory instruments, metal welding glass and so on. Borosilicate glass is mainly composed of B2O3 and has a low melting temperature to resist sodium vapor corrosion.
The purpose of using the gasket is to use the gasket material to be easily deformed under the action of the compressive load so as to fill the uneven surface of the flange sealing surface, thereby achieving sealing
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