Theoretically, the size of the Alumina ceramic parts can be widely used in crucible, only limited by the size of the ingot furnace in practical applications. The larger the silicon ingot, the better the quality of the product. Defects and impurities that affect the quality of the silicon ingot will tend to the edge of the silicon ingot. A large-size silicon ingot can produce more and more useful and better-quality products, with a higher yield rate. Therefore, the international trend is to produce silicon ingots of larger sizes.
The main difference between the application of Alumina ceramic parts and quartz crucible in polycrystalline silicon is the difference in their thermal properties. Some thermal properties are not much different, for example, the linear expansion coefficient: the linear expansion coefficient of the Alumina ceramic parts and the quartz glass crucible differs very little, the linear expansion coefficient is very low at 0.6×10-6 / ℃, close to zero expansion;
Thermal shock resistance: Alumina ceramic parts and quartz glass crucibles have very low linear expansion coefficients, so they have very good thermal shock resistance. The sample will not burst when heated to 1000 ℃ and then put into 20 ℃ water. The resistance to thermal shock is usually measured by the number of times the quenched water is heated until it breaks. The main differences are softening temperature and devitrification.
website: https://www.yhceramicparts.com/
Post time: Jun-10-2024