Silicon micro powder production technology!

As a modified silica micro powder manufacturer, today I will talk to you about the production technology of silica micro powder.

According to particle morphology, the current silicon micro powder products on the market mainly include angular silicon micro powder, quasi spherical silicon micro powder, and spherical silicon micro powder. For the production of angular silicon micro powder, the angular silicon micro powder has irregular shape and is mostly angular silicon micro powder. Its production raw materials are mainly vein quartz, quartzite and fused silica, which can also be divided into angular crystalline silicon micro powder and angular fused silicon micro powder. The main production equipment for angular silicon micro powder includes ball mills, vibration mills, micro powder classifiers, and dryers. The production process includes dry grinding and wet grinding. The grinding medium is mainly made of alumina ceramic balls or silica, and the inner lining of the grinding machine is made of high-strength wear-resistant materials such as alumina ceramics, silica or polyurethane rubber.

In the production of spherical silicon micro powder, spherical silicon micro powder refers to amorphous quartz powder material with spherical particles and mainly composed of silicon dioxide. Its production raw material is mainly angular silicon micro powder, and the production methods mainly include flame melting method, plasma heating furnace method, chemical synthesis method, hydrolysis method, etc. At present, flame melting method is mainly used in China to produce spherical silicon micro powder. The key to this technology is that the heating device requires a stable temperature field, easy adjustment of temperature range, and no secondary pollution to the silicon micro powder.

In addition, it is also necessary to mention the process of producing spherical silicon micro powder by high-frequency plasma melting method. The hydrolysis method is to add liquid SiCl4 to deionized water with different dispersants at a constant speed, and simultaneously stir the hydrolysis products at high speed with a quartz rod. After aging, washing, and filtering, the hydrolysis products are dried and dehydrated to constant weight in a constant temperature box of 100 ℃ -200 ℃, and then transferred to a high-temperature sintering furnace for high-temperature sintering dehydroxylation and crystal transformation at different temperatures. After grinding and screening, high-purity spherical silicon micro powder with the desired particle size is obtained.

If you want to learn more about modified silica micro powder, please feel free to contact us at any time.