Heat-Resistant Wollastonite Powder for Electrical Insulation Materials & Circuit Boards

Heat-resistant wollastonite powder is a specialized calcium silicate mineral additive engineered for electrical insulation materials and circuit boards (PCBs). Processed via advanced beneficiation, high-temperature calcination, and precision grinding technology, this inorganic mineral features exceptional thermal stability (resisting up to 1200℃), excellent electrical insulation properties (volume resistivity ≥10¹² Ω·cm), and a needle-shaped crystal structure (aspect ratio 15:1–20:1) that enhances mechanical reinforcement.

Designed to meet the rigorous demands of electrical and electronic applications, it improves the heat resistance, flame retardancy, and dimensional stability of insulation materials—preventing thermal degradation and ensuring reliable performance under high-temperature operating conditions. When incorporated into epoxy, phenolic, and unsaturated polyester resins, it boosts the mechanical strength (tensile, flexural) of circuit boards and insulation components while maintaining low dielectric loss, critical for signal integrity in electronic devices.

Its uniform particle size distribution (325–1250 mesh, customizable) ensures optimal dispersion in resin matrices, avoiding agglomeration and enhancing processability during molding and lamination. Eco-friendly, non-toxic, and compliant with ISO 9001/ROHS standards, it is free of heavy metals and halogenated substances, aligning with global electronic waste regulations. Ideal for electrical insulation films, PCB substrates, transformer insulation materials, and electronic component housings, it provides a cost-effective, high-performance solution for manufacturers developing durable, heat-resistant electronic products.