Quartz ,quartz powder is non-metallic mineral products , they are hard and durable silicate mineral,he main mineral composition is SiO2 , the color of quartz sand is white ,semitransparent ,chemical property is stable.

easy to mix with other raw friction materials, it can increase the thermal conductivity,hardness,adhesive properties change,enhance flame retardantproperties. Tangshan Hanwei Specially friction material industry applied Quartz powder. 

Widely use in friction materials additives,glass,plastic,rubber,and grinding material industry.