Why does China choose quartz crucible directly in the aspect of Czochralski silicon?
The oxygen in the quartz crucible can not be avoided, and other methods can be adopted to reduce oxygen.
Because (1) the melting point of silicon is at 1450 degrees, the container for molten silica must be sufficiently high. (2) Czochralski silicon is the rearrangement of the atomic structure. High purity is essential and insoluble impurities. Quartz crucible material is SiO2, high temperature and stability, will not bring other impurities. That is, the O atoms of the quartz crucible also affect the quality of monocrystalline silicon. (3) when foreign countries engage in these scientific studies, China is still living long with the emperor, so these technologies were introduced into China in the last century of 50s, and the current development is still 50 years from home!
Hello, quartz crucibles are the necessary accessories for CZ crystals. They have not been heard to replace quartz crucibles. You are new enough.
