10 major application areas of silicon micropowder
Silica powder is a kind of inorganic non-metallic material with wide applications. Silica powder is a micron-level powder obtained by crushing and pulverizing high-purity quartz ore by physical or chemical methods. Its particle size is generally between 1-100 microns, and the commonly used particle size is about 5 microns. With the advancement of semiconductor manufacturing processes, silica powder below 1 micron has gradually been widely used.
Silica powder has a series of advantages such as excellent dielectric properties, low thermal expansion coefficient, high thermal conductivity, high chemical stability, high temperature resistance, and high hardness. It can be widely used in copper clad laminates, epoxy molding compounds, electrical insulation materials, and adhesives. In addition, it can also be used in coatings, rubber, plastics, cosmetics, and honeycomb ceramics.
1 Copper clad laminate
Adding silicon powder to copper clad laminate for electronic circuits can improve the linear expansion coefficient and thermal conductivity of printed circuit boards, thereby effectively improving the reliability and heat dissipation of electronic products.
2 Epoxy molding compound (EMC)
Filling silicon powder into epoxy molding compound for chip packaging can significantly improve the hardness of epoxy resin, increase thermal conductivity, reduce the exothermic peak temperature of epoxy resin curing reaction, reduce linear expansion coefficient and curing shrinkage, reduce internal stress, and improve the mechanical strength of epoxy molding compound, making it infinitely close to the linear expansion coefficient of the chip.
3 Electrical insulation materials
Silicon powder is used as epoxy resin insulation filler for electrical insulation products. It can effectively reduce the linear expansion coefficient of the cured product and the shrinkage rate during the curing process, reduce internal stress, and improve the mechanical strength of the insulating material, thereby effectively improving and enhancing the mechanical and electrical properties of the insulating material.
4 Adhesives
Silicon powder, as an inorganic functional filling material, is filled in adhesive resin, which can effectively reduce the linear expansion coefficient of the cured product and the shrinkage rate during curing, improve the mechanical strength of the adhesive, and improve the heat resistance, anti-permeability and heat dissipation performance, thereby improving the bonding and sealing effect.
5 Plastics
Silicon powder can be used in plastics in products such as polyvinyl chloride (PVC) flooring, polyethylene and polypropylene films, and electrical insulation materials.
6 Coatings
In the coatings industry, the particle size, whiteness, hardness, suspension, dispersibility, low oil absorption, high resistivity and other characteristics of silicon micropowder can improve the corrosion resistance, wear resistance, insulation and high temperature resistance of the coating. Silicon micropowder used in coatings has always played an important role in coating fillers due to its good stability.
Spherical silica powder has good fluidity and large specific surface area, which makes it suitable for cosmetics such as lipstick, powder, foundation cream, etc. In powder products such as powder, it can improve fluidity and storage stability, thereby playing a role in preventing caking; the smaller average particle size determines its good smoothness and fluidity; the larger specific surface area makes it have better adsorption, can absorb sweat, fragrance, nutrients, and make cosmetic formulas more economical; the spherical shape of the powder has good affinity and touch to the skin.
8 Honeycomb ceramics
Automobile exhaust filter DPF made of honeycomb ceramic carrier for automobile exhaust purification and cordierite material for diesel engine exhaust purification is made of alumina, silica powder and other materials through mixing, extrusion molding, drying, sintering and other processing.
9 Rubber
Silicon powder is a reinforcing material for rubber. It can enhance the comprehensive properties of rubber, such as strength, toughness, elongation, wear resistance, finish, anti-aging, heat resistance, anti-slip, tear resistance, acid and alkali resistance, etc. It is indispensable in the production process of rubber products.
10 Artificial quartz
Silicon powder is used as a filler in artificial quartz board, which can not only reduce the consumption of unsaturated resin, but also improve the wear resistance, acid and alkali resistance, mechanical strength and other properties of artificial quartz board. The filling ratio of silicon powder in artificial marble is generally about 30%.