Quartz crucible is the container and key consumption material of polycrystalline silicon ingot, so higher requirements are put forward for its production. Only crucibles with higher dimensional accuracy, higher purity and more stable quality can ensure that the quality of products can meet the requirements of customers.
Polysilicon chip is widely used in solar cells, and its quality will directly affect the conversion efficiency of solar cells. Quartz crucible is used as container in polysilicon ingot because of its high temperature and no chemical reaction with silicon. Therefore, the production of crucible is also required
As a kind of clean energy, solar cell has been paid more and more attention all over the world. Among them, polycrystalline silicon has the highest industrialization ratio because of its relatively low requirements for raw materials. Fused quartz crucible is a kind of fused quartz ceramics, which is widely used in polysilicon ingot technology of solar photovoltaic industry.
In the process of polycrystalline silicon ingot casting, the fused quartz crucible is in a very harsh environment. It has to withstand the high temperature of 1550 ℃ and work continuously for more than 50h at a time. Therefore, the raw material purity and various properties of the crucible are required to be high. Therefore, the production technology of crucible is difficult. At present, the development trend of crucible is large size and thin wall.
