Performance Of High Purity Silicon Powder
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Performance of metal silicon powder
1. High temperature resistance. The melting point of metal silicon is 3850±50℃ and the boiling point is 4250℃. Even with ultra-high temperature arc combustion, the weight loss and thermal expansion coefficient are very small. The strength of metal silicon increases with the increase of temperature, and the strength of metal silicon doubles at 2000℃.
2. Electrical conductivity and thermal conductivity. The electrical conductivity of metal silicon is one hundred times higher than that of general non-metallic minerals. The thermal conductivity exceeds that of metal materials such as steel, iron, and lead. The thermal conductivity decreases with the increase of temperature, and even metal silicon becomes an insulator at high temperature. Metal silicon can conduct electricity because each carbon atom in metal silicon only forms three covalent bonds with other carbon atoms, and each carbon atom also retains a free electron to transfer charge.
3. Lubricity. The lubricity of metal silicon depends on the size of metal silicon flakes. The larger the flakes, the smaller the friction coefficient and the better the lubricity.
4. Chemical stability: Metal silicon has good chemical stability at room temperature and can resist corrosion from acids, alkalis and organic solvents.
5. Plasticity. Metal silicon has good toughness and can be ground into thin sheets.
6. Thermal shock resistance. Metal silicon can withstand drastic temperature changes at room temperature without being damaged. When the temperature suddenly changes, the volume of metal silicon does not change much and no cracks will appear.
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