polycrystalline silicon

  • Name: Polycrystalline Silicon
  • Package: Jumbo Bag

  • Grade:6N or 9N

  • Shape: Scrap

  • Usage:Instead of silicon metal  for Steelmaking or Casting

Polycrystalline silicon is single crystal of silicon. A crystal with a basically complete lattice structure. Different directions have different properties and are a good semi-conducting material. Purity requirements to achieve 99.9999%, even 99.9999999% or more. Used in manufacturing semiconductor devices, solar cells, etc. It is made of high purity polycrystalline silicon in single crystal furnace.

There are two types of the graphite carbon, one is natural graphite, the other is artificial graphite,the natural graphite can be divided into flake graphite and microcrystalline graphite; the main raw material of manufacturing artificial graphite is powdered high-quality calcined petroleum coke, add asphalt as a binder, and add a small amount of other auxiliary materials. After the various raw materials are mixed, they are pressed and formed, and then processed in a non-oxidizing atmosphere are 2500~3000℃ to make them graphitized, after high temperature treatment, the ash, sulfur and gas contents have all been greatly reduced.

★ Solar grade polysilicon scrap, broken wafer scrap
 Off-grade polysilicon lump from smelt factories
★ Polysilicon ingot scraps and Polysilicon pot scraps

Polycrystalline silicon Type Si Composition (%)
3N Polycrystalline silicon 99.9
4N Polycrystalline silicon 99.99
5N Polycrystalline silicon 99.999
6N Polycrystalline silicon 99.9999