The Use of Silica Powder

What is silica powder?

Silica powder is a type of micro powder processed from natural quartz (SiO2) or fused quartz (amorphous SiO2 after high-temperature melting and cooling) through multiple processes such as crushing, ball milling (or vibration, airflow milling), flotation, acid washing purification, and high-purity water treatment. Silica powder has excellent properties such as good temperature resistance, acid and alkali corrosion resistance, poor thermal conductivity, high insulation, low expansion, stable chemical properties, and high hardness.

Application of Silica powder

Silica powder materials, due to their various advantageous properties, can also be widely used in areas such as epoxy moulding materials, electrical insulation materials, adhesives, ceramics, coatings, fine chemicals, and advanced building materials, in addition to the field of copper clad laminates.

The epoxy sealing material is crucial for encapsulating chips in electronic products, and the industry development maintains good consistency with integrated circuits. Due to the high cross-linking structure of pure epoxy resin, which has drawbacks such as brittleness, poor heat resistance, and poor impact toughness, it is necessary to add fillers with heat resistance and curing solid effects. Silicon powder is one of the commonly used fillers. At present, the main components of widely used epoxy moulding materials are:

• Fillers (mainly using silicon powder, accounting for 60% to 90%).

• Epoxy resin (below 18%).

• Curing agents (below 9%).

• Additives (about 3%).

The DPF (Particulate Filter) for automotive exhaust purification using honeycomb ceramic carriers and cordierite materials for engine exhaust purification is prepared by mixing, extruding, drying, sintering, and other processes using various materials such as alumina and silicon powder. Spherical silicon powder can improve honeycomb ceramic products' forming rate and stability.

Adhesives such as adhesives for bonding wind turbine blades and similar large composite structural parts and building structural adhesives also use silica fume as an essential raw material, which makes bonds have appropriate viscosity, excellent thixotropy and sagging resistance, high bonding strength, fatigue resistance and other characteristics.

In other applications, as submicron spherical silicon powder is very suitable for reducing the viscosity of various resins and paints, improving flowability, reducing burrs, etc., it is widely used as a functional additive for promoting flowability and reducing burrs of multiple resins used in semiconductor packaging, carbon powder additive, silicone rubber filler, sintering material, and additive.

In summary, micro silicon powder has a wide range of applications due to its excellent properties, especially high-performance Silica powder, which plays a role in various downstream fields.

Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional silica powder supplier with over 12 years experience in chemical products research and development.?

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