Silicon
MATERIAL OVERVIEW
Characteristics: Dark colored crystals (the octahedral form in which the atoms have the diamond arrangement). The amorphous form is a dark brown powder. Soluble in a mixture of nitric and hydrofluoric acids and in alkalies. Insoluble in water, nitric and hydrochloric acid. Mohs hardness 7, dielectric constant 12, coordination number 6. Si atom is surrounded by 4 oxygen atoms. In this respect it is similar to carbon, except that it does not form compounds having double or triple bonds, and is less electronegative.
Hazards: Flammable in powder form.
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GENERAL PROPERTIES
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Symbol: |
Si |
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Atomic Number: |
14 |
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Atomic Weight: |
28.0855 |
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Density: |
2.33 gm/cc |
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Melting Point: |
1410 oC |
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Boiling Point: |
2355 oC |
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Thermal Conductivity: |
1.49 W/cm/K @ 298.2 K |
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Electrical Resistivity: |
3-4 microhm-cm @ 0 oC |
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Electronegativity: |
1.8 Paulings |
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Specific Heat: |
0.168 Cal/g/K @ 25 oC |
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Heat of Vaporization: |
40.6 K-Cal/gm atom at 2355 oC |
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Heat of Fusion: |
9.47 Cal/gm mole
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TYPICAL ANALYSES - Impurities in ppm
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Material / Purity: |
3N |
6N |
| Al | 110 | .007 |
| B | 40 | .025 |
| Ca | 20 | <.005 |
| Fe | <100 | .005 |
| Mg | <10 | .001 |
| Mn | <60 | .001 |
| P | 40 | .002 |
| Ti | <40 | .0007 |
| Cu | - | .004 |
| Li | - | .002 |
| Zn | - | <.03 |
| As | - | .051 |
| Na | - | .011 |
| S | - | .060 |
| Cl | - | .45 |
| K | - | .011 |
| V | - | .0004 |
| Cr | - | .002 |
| Co | - | .0006 |
| Ni | - | <.005 |
SILICON ROD
|
Material |
Purity |
Silicon Rod .0625"   |
6N |
Silicon Rod .125"   |
5N |
Silicon Rod .250"   |
5N, 6N |
| Silicon Rod .500" |
5N |
Rod is cut to order and sold by the inch or foot. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional diameters or custom sizes.
SILICON LUMP POWDER, SHOT, PELLETS, & INGOT
|
Material |
Purity |
| Silicon Lump | 5N5, 6N |
Silicon Pieces 3-6mm  |
5N, 6N |
Silicon Pieces 12mm+   |
6N |
| Silicon Powder -200 mesh | 1N8, 2N1 |
| Silicon Powder -325 Mesh | 2N8 |
Powder, shot, pellets, and ingots are packaged to order and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.
SILICON COMPOUNDS
|
Material |
Purity |
| Silicon Carbide SiC 7 Microns or Less | 2N5 |
| Silicon Carbide SiC -325 Mesh | 2N |
| Silicon Dioxide SiO2 1/2"-1/8" Pieces | 3N, 4N |
| Silicon Dioxide SiO2 -10 Mesh | 5N |
| Silicon Dioxide SiO2 1/8" Pieces by Down | 4N |
| Silicon Dioxide SiO2 -100 Mesh | 4N |
| Silicon Dioxide SiO2 -325 Mesh | 3N |
| Silicon Dioxide SiO2 -4 +16 Mesh | 3N |
| Silicon Monoxide SiO 1/4" to 1/8" Pieces | 3N, 4N |
| Silicon Monoxide SiO -325 Mesh | 3N, 4N |
| Silicon Nitride Si3N4 -325 Mesh | 1N8, 2N5, 3N |
| Silicon Nitride Si3N4 1/2" to 1/8" Pieces | 1N8 |
Compounds are packaged to order and sold by the gram or kilogram. Call or This email address is being protected from spambots. You need JavaScript enabled to view it. for additional specifications or custom requirements.
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ALLOYS 
