Silicon is a nonmetallic element, its atomic number is 14, atomic weight is 28.80, density 2.33g/m3, and its melting point is 1410 ° C, boiling point is 2355 ° C, resistivity is 2140Ω.m, it has stereotypes and crystal two allotropes. Industrial silicon, also known as metallic silicon and crystalline silicon, was a silver-gray crystalline, hard and brittle, melting quartz and other materials containing SiO2 98.5%.Extremely wide range of uses of silicon metal is a basic industrial raw materials, widely used in many industries and fields, mainly used in the aerospace, aviation, electronics, chemical industry, smelting, thermal insulation, refractory industry.
National Standards of metal silicon
Item | Brand | Chemical index (Impurity no more than) | Applications | |||
Si more than | Impurity no more than | |||||
Fe | Al | Ca | ||||
Grade A | Si-A | 99.3 | 0.4 | 0.2 | 0.1 | Chemistry field |
Grade B | Si-B | 99.0 | 0.5 | 0.3 | 0.2 | |
Grade One | Si-1 | 98.5 | 0.6 | - | 0.3 | metallurgy |
Grade Two | Si-2 | 98.0 | 0.7 | - | 0.5 | |
Grade Three | Si-3 | 97.0 | 1.0 | - | 1.0 | |
Enterprise Standards of metal silicon
Brand | Chemical index (Impurity no more than) | |||
Si more than | Impurity no more than | |||
Fe | Al | Ca | ||
Si-2202 | 99.5 | 0.2 | 0.2 | 0.02 |
Si-3303 | 99.3 | 0.3 | 0.3 | 0.03 |
Si-411 | 99.3 | 0.4 | 0.1 | 0.1 |
Si-421 | 99.2 | 0.4 | 0.2 | 0.1 |
Si-441 | 99.0 | 0.4 | 0.4 | 0.1 |
Si-553 | 98.5 | 0.5 | 0.5 | 0.3 |
