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| CAS No.: | 69012-64-2 |
| Formula: | C7h9n5s2 |
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Silicon oxide powder CAS code 69012-64-2 is also known as silica fume, microsilica, or pyrogenic silica. It is a fine, white powder that is produced as a by-product of the production of silicon metal or ferrosilicon alloys. Silica fume is primarily composed of amorphous silicon dioxide (SiO2), but it also contains small amounts of carbon and trace elements.
Silica fume is a highly reactive material that has a number of unique properties. It is very small, with particle sizes ranging from 0.01 to 0.1 micrometers. This makes it very effective for filling in voids and pores in concrete and other materials. Silica fume is also very strong and durable, and it can improve the compressive strength, flexural strength, and abrasion resistance of concrete.
Silica fume, also known as microsilica, (CAS number 69012-64-2, EINECS number 273-761-1) is an amorphous (non-crystalline) polymorph of silicon dioxide, silica. It is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production and consists of spherical particles with an average particle diameter of 150 nm. The main field of application is as pozzolanic material for high performance concrete.| Parameter | Typical Range/Value |
|---|---|
| Chemical Composition | Silicon Dioxide (SiO2): >85% |
| Particle Size | 0.1 - 0.3 μm |
| Surface Area | >20,000 m²/kg |
| Bulk Density | 200 - 700 kg/m³ |
| Color | Gray to off-white |
| Purity | High purity with minimal impurities |
| Amorphous Structure | Amorphous (non-crystalline) |
| Surface Reactivity | High reactivity due to small size |
| Pozzolanic Activity | Enhances concrete strength/durability |
| Dosage | Typically 5% - 10% by weight in concrete |
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