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Evaluation of silicon content of metal silicon powder

Metallic silicon powder refers to raw materials used in refractory materials and powder metallurgy industries.

The main component of metallic silicon powder is crystalline silicon (Si). The initial form is lumpy and becomes powder after crushing or grinding. Metallic silicon is also called crystalline silicon or industrial silicon. Its main use is as a non-ferrous alloy. additive. Metallic silicon is a product smelted from quartz and coke in an electric furnace. The main component silicon content is about 98% (in recent years, 99.99% Si content is also included in metallic silicon), and the remaining impurities are iron and aluminum. , calcium, etc.

Semiconductor silicon is a high-purity metallic silicon used to make semiconductor devices. It is sold in polycrystalline and monocrystalline forms, the former is cheap and the latter is expensive. It is divided into various specifications due to different uses. The properties of metallic silicon are similar to those of germanium, lead, and tin, and have semiconductor properties. Silicon is very abundant in the earth's crust, second only to oxygen, accounting for more than a quarter of the total weight of the earth's crust, and exists in the form of silica or silicate. Silicon has two allotropes: one is a dark brown amorphous powder, which is reactive and can burn in the air; the other is a stable crystal (crystalline silicon). Generally, silica and quartz are used in glass and other building materials, and high-quality quartz is used to make alloys, metals and single crystal silicon.

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