Ferro alloy
Metallic Silicon 441 Garde Metal Si 411
The main purpose of the silicon metal is the additive as a non-iron-base alloy. The content of silicon in the earth crust is 27.7%, the second largest element in earth curst, the most abundant elem...
DESCRIPTION
The main purpose of the silicon metal is the additive as a non-iron-base alloy. The content of silicon in the earth crust is 27.7%, the second largest element in earth curst, the most abundant element in the earth crust – oxygen and silicon – combine to silica SiO2, accounting for 87% of the total mass of the crust. Silicon is a nonmetallic element, gray, metallic color, hard and brittle. Atomic weight 28.80; density is 2.33g/m3; melting point is 1410℃; boiling point is 2355℃; resistivity was 2140Ω.m. Semiconductor silicon, which use for production of semiconductor device, is a high purity silicon metal, with polycrystalline and monocrystalline form.
| Grade | Composition | |||
| Impurities(%) | ||||
| Si | Fe | AI | Ca | |
| ≥ | ≤ | |||
| 411 | 99.4 | 0.4 | 0.1 | 0.1 |
| 421 | 99.3 | 0.4 | 0.2 | 0.1 |
| 441 | 99.1 | 0.4 | 0.4 | 0.1 |
| 553 | 98.7 | 0.5 | 0.5 | 0.3 |
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