| Product Name | Glass Charger Plates |
| Materials | Glass |
| Size | 20*20cm |
| Weight | 380g |
| Style | Modren |
| Sample time | 3-7days |
| Modes of packing | Packing 24 per carton |
| Logo | Customized |
| MOQ | 88 Pcs |
| Type | table decoration charger |
| Lead time | 30 days |
Usually according to the different contents of SiO2 and alkali metal and alkaline earth metal oxides in glass, it is divided into: quartz glass. SiO2 content is more than 99.5%, low thermal expansion coefficient, high temperature resistance, good chemical stability, transmission of ultraviolet and infrared light, high melting temperature, high viscosity, and difficult to shape. Its output accounts for 90% of practical glass. It can produce glass jars, flat glass, utensils, light bulbs, etc. 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 stems, crystal glassware, flint optical glass, etc. Lead glass containing a large amount of PbO can block X-rays and γ-rays. Aluminosilicate glass. With SiO2 and Al2O3 as the main components, the softening and deformation temperature is high, and it is used to make discharge bulbs, high-temperature glass thermometers, chemical combustion tubes and glass fibers. Borosilicate glass. With SiO2 and B2O3 as the main components, it has good heat resistance and chemical stability, and is used to manufacture cooking utensils, laboratory instruments, metal sealing glass, etc. Borate glass is mainly composed of B2O3, has a low melting temperature, and is resistant to sodium vapor corrosion. The borate glass containing rare earth elements has high refractive index and low dispersion, and is a new type of optical glass. Phosphate glass is mainly composed of P2O5, with low refractive index and low dispersion, and is used in optical instruments.
The molecular arrangement of glass is random, and its molecules are statistically uniform in space. In an ideal state, the physical and chemical properties of homogeneous glass (such as refractive index, hardness, elastic modulus, thermal expansion coefficient, thermal conductivity, electrical conductivity, etc.) are the same in all directions. Glassy substances are generally obtained by rapid cooling of the melt. When the molten state is transformed to the glassy state, the viscosity increases sharply during the cooling process, and the particles are too late to form a regular arrangement without releasing the latent heat of crystallization. Therefore, the glassy state Substances have higher internal energy than crystalline substances, and their energy is between the molten state and the crystalline state, belonging to a metastable state. From a mechanical point of view, glass is an unstable high-energy state. For example, there is a tendency to transform into a low-energy state, that is, there is a tendency to crystallize. Therefore, glass is a metastable solid material.
