News

Silicon Metal 553#, Silicon Metal 441# differ significantly in purity, impurity content, application areas, and price. Silicon Metal 553# is a general-purpose product with a silicon content ≥98.5%, iron ≤0.5%, aluminum ≤0.5%, and calcium ≤0.3%, primarily used in the aluminum alloy and organosilicon industries.

Silicon Metal 441# has a silicon content ≥99.0%, iron ≤0.4%, aluminum ≤0.4%, and calcium ≤0.1%, and is the mainstream raw material for producing polycrystalline silicon and organosilicon.

I. Differences in Chemical Composition and Purity

Silicon Metal 553#:
Silicon Content: ≥98.5%
Impurity Content: Iron ≤0.5%, Aluminum ≤0.5%, Calcium ≤0.3%

Silicon Metal 441# :
Silicon Content: ≥99.0%
Impurity Content: Iron ≤0.4%, Aluminum ≤0.4%, Calcium ≤0.1%

High-grade metallic silicon impurity content control is more stringent, especially the content of the three main impurities—iron, aluminum, and calcium—which decreases progressively.

Application Characteristics of Silicon Metal 441#

Silicon Metal 441# is a chemical-grade product, mainly used in:

• Organosilicon Production: It is the mainstream raw material for producing organosilicon monomers, silicone oils, silicone rubbers, and silicone resins.
• Polycrystalline Silicon Production: As a raw material for photovoltaic-grade polycrystalline silicon, used in the manufacture of solar cells.
• Aluminum Alloy Additive: Used in the production of aluminum alloys requiring high purity.

Silicon Metal 553# and Silicon Metal 441# represent two different grades of industrial silicon.

Silicon Metal 553#, as a basic industrial raw material, is characterized by large output, wide application, and low cost, and is an important support for the traditional metallurgical and chemical industries;

Silicon Metal 441#, as a chemical grade product, although it has a large output and moderate cost, has a higher technical threshold and is the mainstream raw material for the production of organosilicon and polysilicon.

We can customize silicon metal with various contents and particle sizes. Please feel free to contact us if needed.