What is metal silicon powder?

Metal silicon powder is a powder state of metal silicon. Silicon has two allotropes, amorphous silicon and crystalline silicon. Amorphous silicon is a gray-black powder that is actually a microcrystal. Crystalline silicon has the crystal structure and semiconductor properties of diamond, with a melting point of 1410°C, a boiling point of 2355°C, a density of 2.32~2.34 g/cm3, a Mohs hardness of 7, and a brittleness.

The main characteristics of metal silicon powder

Chemical silicon refers to metallic silicon used in the production of organosilicon and polysilicon. From a global perspective, the consumption of metallurgical silicon is more than that of chemical silicon. However, with the continuous development of science and technology, chemical silicon has been widely used in the production of organic silicon and semiconductors, and is widely used in the production of organic silicon. Silicon monomer and polymer silicone oil, silicone rubber, silicone resin building anticorrosion, water repellent, etc. They have unique properties such as high temperature resistance, electrical insulation, radiation resistance, and waterproofing. Used in electrical, aviation, machinery, chemical, pharmaceutical, national defense, construction and other departments. As the core of integrated circuits, more than 95% of electronic components are made of semiconductor silicon, which is the backbone of the contemporary information industry.

Amorphous silicon is chemically active and can burn violently in oxygen. It reacts with non-metals such as halogen, nitrogen and carbon at high temperature, and can also interact with metals such as magnesium, calcium and iron to form silicides. Amorphous silicon is almost insoluble in all inorganic and organic acids including hydrofluoric acid, but is soluble in mixed acids of nitric acid and hydrofluoric acid. Concentrated sodium hydroxide solution can dissolve amorphous silicon and release hydrogen. Crystalline silicon is relatively inactive, it does not combine with oxygen even at high temperature, it is not soluble in any inorganic acid and organic acid, but it is soluble in mixed acids of nitric acid and hydrofluoric acid and concentrated sodium hydroxide solution.

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tags: semiconductor semiconductor material