| TRADE NAME | PURITY | PARTICLE SIZE | A. D. (g/cm3) | T. D. (g/cm3) | OXYGEN | MORPHOLOGY |
|---|---|---|---|---|---|---|
| SMP | 97% MIN | <3 MICRONS | 0.4-0.6 | 0.7-1.1 | <0.5% | IRREGULAR |
| TRADE NAME | PURITY | PARTICLE SIZE | A. D. (g/cm3) | T. D. (g/cm3) | OXYGEN | MORPHOLOGY |
|---|---|---|---|---|---|---|
| SMP | 97% MIN | <3 MICRONS | 0.4-0.6 | 0.7-1.1 | <0.5% | IRREGULAR |
The basic process heats silica and coke in a submerged electric arc furnace to high temperatures. High temperatures are required to produce a reaction where the oxygen is removed, leaving behind silicon. This is known as a reduction process. In this process, metal carbides usually form first at the lower temperatures. As silicon is formed, it displaces the carbon. Refining processes are used to improve purity.
Silicon powder is a fine, gray powder made from silicon, it is a hard, brittle metalloid, meaning it has properties of both metal and nonmetals.
Silicon powder is produced by grinding scrapped single crystal silicon wafers. It has a fine consistency that allows it to be shaken, pressed, and bonded to other materials based on its grain size.
Silicon powder has many applications, including:
| Silicon | Values |
|---|---|
| Molecular Weight | 28.08 |
| Appearance | Silvery |
| Melting Point | 1414 °C |
| Boiling Point | 2900 °C |
| Density | 2.33 g/cm3 |
| Solubility in H2O | N/A |
| Electrical Resistivity | 3-4 microhm-cm @ 0 °C |
| Electronegativity | 1.8 Paulings |
| Heat of Fusion | 9.47 Cal/gm mole |
| Heat of Vaporization | 40.6 K-Cal/gm atom at 2355 °C |
| Poisson's Ratio | 0.064 - 0.28 |
| Specific Heat | 0.168 Cal/g/K @ 25 °C |
| Tensile Strength | N/A |
| Thermal Conductivity | 1.49 W/cm/K @ 298.2 K |
| Thermal Expansion | (25 °C) 2.6 µm·m-1·K-1 |
| Vickers Hardness | N/A |
| Young's Modulus | 51-80 GPa |
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