Silicon metal 553, also known as Silicon-53 or RTV553, is an important industrial material, which is described in detail below:
silicon metal 553 definition and classification
Definition: Silicon metal 553 is a product smelted by silica (or quartz) and carbonaceous reductant (such as coke) in a mineral heat furnace. The content of the main ingredient, silicon element, is usually around 98%, and in recent years, products with silicon content of 99.99% have also been included in the category of silicon metal. The remaining impurities mainly include iron, aluminum, calcium and other elements.
Classification: According to the different content of iron, aluminum, calcium and other impurities in the silicon metal, it can be divided into a variety of specifications, such as 553, 441, 411, 421, 3303, 3305, 2202 and other grades. 553 silicon metal represents the varieties of silicon metal containing iron less than or equal to 0.5%, aluminum less than or equal to 0.5%, calcium less than or equal to 0.3%.
silicon metal 553 physical and chemical properties
Physical properties: silicon metal is gray, metallic color, hard and brittle. Its melting point is 1410 ° C, boiling point of 2355 ° C, density of 2.33 g / m ³, resistivity of 2140 Ω - m.
Chemical properties: the chemical properties of silicon metal is relatively stable, but at high temperatures can react with halogens, nitrogen, carbon and other non-metals, but also with magnesium, calcium, iron and other metals to generate silicides. In addition, silicon metal can also be dissolved in nitric acid and hydrofluoric acid mixed acid and concentrated sodium hydroxide solution.
silicon metal 553 applications
Additives for non-ferrous alloys: Silicon metal 553 can be used as an important additive for non-ferrous alloys such as aluminum alloys to improve the performance and quality of the alloy.
Sealing materials: In the field of sealant, metallic silicon 553 has excellent mechanical properties, durability, oil resistance, solvent resistance and high temperature resistance, etc. It is widely used in automobile insulation, aircraft engine sealing, transformer sealing and household appliances.
In addition, silicon metal 553 can also be used in the manufacture of silicon polished wafers, solar cells and high-purity silicon products, etc. It is one of the most basic raw materials for the information industry and new energy industry.
silicon metal additional products
The additional products of silicon metal 553 include silicon micropowder (also known as silicon powder, microsilicon powder or silicon ash), edge-skinned silicon, black-skinned silicon and silicon metal slag. Among them, silicon micropowder has a wide range of applications in the refractory and concrete industries.
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