Introduction to the physical and chemical properties of crystalline silicon micro powder

Micro silicon powder, also known as silicon micro powder, also known as silica fume, silicon powder or silica ultrafine powder.

Micro silicon powder is an ultrafine silicon powder material formed by the rapid oxidation and condensation of SiO2 and Si gases generated by metallurgical electric furnaces at high temperatures above 2000 ℃ with oxygen in the air.

1. Micro silicon powder:

The appearance is gray or off white powder, with a fire resistance of>1600 ℃. Bulk density: 200-250 kilograms per cubic meter.

2. Fineness of microsilica powder:

More than 80% of microsilica powder has a fineness of less than 1 μ m, with an average particle size ranging from 0.1 to 0.3 μ m and a specific surface area of 20 to 28 m2/g. Its fineness and specific surface area are about 80-100 times that of cement and 50-70 times that of fly ash.

3. Particle morphology and mineral phase structure:

During the formation process of microsilica powder, amorphous spherical particles are formed due to surface tension during phase transition, and the surface is relatively smooth. Some are aggregates of multiple spherical particles stuck together. It is a volcanic ash material with a large specific surface area and high activity. Materials mixed with microsilica powder, small spherical bodies can provide lubrication.