1. Grease: In the process of polysilicon production, oil molecules are very harmful to polysilicon. It has been proved that a few ppm of oil content in the entire process system may cause the polysilicon reaction rate to slow down, the yield to decrease, and even the silicon reaction to stop. Therefore, the degreasing process of polysilicon equipment is particularly important.
2. Moisture: The water contains a large amount of chloride ions, which are very sensitive to the reaction of polycrystalline silicon. Equipment and system drying processes are critical.
3. Chloride ion residue: Chloride ions remaining on the surface of water and other solutions have a great influence on polysilicon. Therefore, it is very important to carry out a pure water rinsing process on the equipment after cleaning.
4, oxides, dust and other impurities: the presence of other dirt, the impact on the production of polysilicon is also very large. Therefore, it is necessary to use the pickling process to clean other dirt during the equipment cleaning process.
Radiata Pine Laminated Veneer Lumber For Construction
General size parameters of poplar plywood:
Size:
4-6cmx12-20cm/22-28cm/30-38cm
Grade: BB/CC, DBB/CC
Glue: E2/E1
Core:poplar or hardwood or combi core or pine core
Pine wood is the quality of man-made board
and widely used in large buildings.
If interested in our products and have any query on plywood,
Please do not hesitate to contact me at any times.
Radiata Pine Laminated Veneer Lumber For Construction
Radiata Pine Laminated Veneer Lumber For Construction, Laminated Veneer Lumber
HUAIAN HONGXIN INTERNATIONAL TRADE CO.,LTD , http://www.hongxin-trade.com