High Hardness Silicon Metal Powder Si 98-99.6%
The crystal structure of metallic silicon powder is diamond type structure, also known as hexagonal dense packing structure. Diamond-shaped structures are composed of compound cubic cells arranged ...
DESCRIPTION
The crystal structure of metallic silicon powder is diamond type structure, also known as hexagonal dense packing structure. Diamond-shaped structures are composed of compound cubic cells arranged in a specific stacking sequence in three-dimensional space. In this structure, the silicon atom bonds to the metal in a very tight coordination relationship, and the valence electrons of the silicon atom form a covalent bond network with neighboring atoms through covalent bonds. This network structure makes the metallic silicon powder have very high density and hardness.
The crystalline structure of silicon metal powder also has higher elastic modulus. Elastic modulus is the ability of a material to undergo elastic deformation when stressed. The elastic modulus of silicon metal powder is about 130-190 GPa, which is much higher than that of ordinary metal materials. This is because the bonding between atoms in the crystal structure of silicon metal powder is very tight, and the covalent bond network of silicon atoms is very stable, which makes silicon metal powder have very high elasticity under force.
| Size (mesh) | Chemical Composition % | |||
| Si | Fe | Al | Ca | |
| ≥ | ≤ | |||
| Si-(20-100 mesh) Si-(30-120 mesh) Si-(40-160 mesh) Si-(100-200 mesh) Si-(45-325 mesh) Si-(50-500 mesh) |
99.6 | 0.2 | 0.15 | 0.05 |
| 99.2 | 0.4 | 0.2 | 0.1 | |
| 99.0 | 0.4 | 0.4 | 0.2 | |
| 98.5 | 0.5 | 0.5 | 0.3 | |
| 98.0 | 0.6 | 0.5 | 0.3 | |
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