Dielectric strength – the maximum electric field a material can withstand without breakdown  is significantly improved in ceramics containing wollastonite powder. With purity levels typically exceeding 95% CaSiO3 and low concentrations of conductive impurities (such as iron and sodium), wollastonite helps maintain high insulation resistance even at voltages exceeding 10kV. When uniformly dispersed in ceramic matrices (often combined with alumina or magnesia), its acicular particles create a tortuous path for electrical current, preventing arcing and ensuring stable performance in high-voltage environments. This makes wollastonite-enhanced ceramics suitable for critical applications where insulation failure could lead to equipment damage or safety hazards.​

Porosity reduction is another key benefit of wollastonite powder in electrical ceramics. During sintering, its fine particle size (5-20 microns) fills gaps between larger ceramic particles, promoting densification and minimizing voids. This dense microstructure not only improves mechanical strength (reducing breakage during handling and operation) but also prevents moisture and gas infiltration – factors that can degrade insulation properties over time. For outdoor insulators exposed to rain, humidity, and pollution, this low porosity is essential for maintaining long-term dielectric performance.​

Thermal conductivity is enhanced in wollastonite-containing ceramics, addressing a critical challenge in high-voltage components that generate significant heat during operation. With a thermal conductivity of approximately 3 W/m·K (higher than many traditional ceramic fillers), wollastonite improves heat transfer away from conductive elements, helping maintain stable operating temperatures. This thermal management capability extends component lifespan by preventing thermal-induced insulation degradation, particularly important in transformers and power distribution equipment where overheating can cause catastrophic failure.​

High-temperature stability ensures wollastonite-enhanced ceramics perform reliably under thermal cycling. The mineral retains its structure and properties at temperatures up to 1500°C, withstanding the elevated temperatures encountered during manufacturing (sintering) and in service. This stability prevents phase changes or thermal expansion mismatches that could create internal stresses or cracks, ensuring dimensional integrity and consistent performance across temperature variations.​

Processing advantages make wollastonite powder easy to incorporate into ceramic formulations. It improves green strength (the strength of unfired ceramics), reducing breakage during shaping and handling. Its low moisture absorption simplifies drying processes, while its compatibility with common ceramic binders ensures uniform mixing and 成型 (forming). For complex shapes like insulator discs or terminal blocks, wollastonite’s flow properties during molding help maintain dimensional accuracy, reducing post-processing requirements.​

Quality control is paramount for electrical-grade wollastonite powder. Suppliers subject it to rigorous testing for dielectric strength, particle size distribution, and impurity levels, ensuring compliance with industry standards such as IEC (International Electrotechnical Commission) specifications. Surface treatment with coupling agents may be used to enhance bonding with ceramic matrices, further improving mechanical and electrical properties.​