company news about How Much Do You Know About Silicon Metal Properties

The price of silicon metal has been rising slightly since 2022. As a result, it has attracted a lot of attention. So, how much do you know about silicon metal? This article focuses on analyzing the properties of silicon metal.

Silicon metal, also known as industrial silicon. It is a product smelted by silicon dioxide and carbonaceous reductant in a submerged arc furnace. The main component of silicon content is usually more than 98.5%, 99.99% or less. The remaining impurities are iron, aluminum, calcium and so on.

Silicon metal is silver-gray crystal with high melting point. It has good heat resistance and high resistivity. Silicon metal has strong oxidation resistance. Silicon metal is smelted from quartzite and other materials containing more than 98.5% SiO2. In China, silicon metal is usually classified into different grades according to the content of iron, aluminum and calcium, such as 553, 441, 421, 3303, 2202 and 1101.

There are two types of silicon metal: metallurgical grade silicon metal and chemical grade silicon metal. Metallurgical grade silicon metal refers to industrial silicon used to formulate various alloys (such as aluminum and silicon in metallurgy). Chemical silicon refers to industrial silicon that is chemically treated and used to prepare organic silicon.

Silicon metal is used in which industries:

1. Organic silicon field: silicone oil, silicone rubber, silane coupling agent and so on.

2. Polysilicon field: solar photovoltaic and semiconductor materials. 3.

3. Aluminum alloy field: automobile engines, wheel hubs, etc.

Organic silicon has the highest requirement for silicon metal. Chemical grade silicon metal is required. The corresponding model is 421#. Next is polysilicon, with common models 553# and 441#. Aluminum has the lowest requirements. However, in recent years, the demand for polysilicon has increased and its share has increased. The demand for aluminum alloy has not only not increased, but also decreased. This is the reason why the capacity of silicon metal on the market seems to be very high. But the actual start rate is not high. It is also an important factor for the serious shortage of high-grade silicon metal in the market.