Application:

The application of polysilicon reactor internals covers emiconductors, photovoltaics, chemical and other fields, and extends to high-end manufacturing fields such as new energy and aerospace. The following are the specific application scenarios and industry characteristics:

• Semiconductor industry

Monocrystalline silicon production: polycrystalline silicon is purified (such as zone melting method, Zzopull method) to make high-purity monocrystalline silicon rods, which are used in the production of integrated circuits (ICs), microprocessors, memory chips and other semiconductor devices.

Special requirements: The purity of semiconductor-grade polysilicon needs to reach more than 9N (99.9999999%), and the cleanliness and corrosion resistance of the reactor internals are extremely high, and metal ions or particle pollution must be avoided

• Photovoltaic (solar) industry

Polycrystalline ingot/monocrystalline wafer production: Polysilicon is made into ingots/ingots by directional solidification or Cyzoral pulling, which are cut into wafers for solar panel manufacturing.

Market share: The PV industry consumes about 90% of the world's polysilicon production and is the largest application area.

• Chemical and new materials industry-Silicone materials

Application scenarios: Polysilicon is used as a raw material to produce intermediates such as trichlorosilane and silicon tetrachloride, and further synthesize silicone oil, silicone rubber, silicone resin and other silicone products for building sealants, electronic packaging materials, medical appliances, etc.

Trim features: reactors need to be resistant to hydrogen chloride (HCl) corrosion, use Hastelloy (e.g., C-276) or enamel-coated trims, and gas distribution devices need to enhance gas-liquid mixing (e.g., jet spargers).

• New energy vehicles and energy storage

Indirect applications: Polysilicon is used in the production of IGBT chips (insulated gate bipolar transistors), which are the core components of electronic control systems and charging piles for new energy vehicles; Silicon-based anode materials are used in lithium batteries to improve energy density.

Trim requirements: Semiconductor-grade polysilicon trim needs to meet a higher level of cleanliness (e.g., magnetic fluid sealing technology to prevent external particles from ingressing).

• Aerospace & Defense

Application scenarios: High-purity polysilicon is used in the manufacture of radomes, infrared optical windows (taking advantage of the light-transmitting properties of silicon), and spacecraft thermal management materials (such as silicon-based composites).

Technical requirements: Internals are tested in extreme environments (e.g. vacuum, high and low temperature cycles) and are made of single crystal graphite or sapphire coated components to ensure long-term reliability.