Baryte
BaSO4
Baryte is a mineral composed of barium sulphate. Its hardness level is approximately 3 on the Mohs scale. It is used as a filler in friction materials and in perforation as a densifier in lubricant mixtures because it is sufficiently soft not to damage tools.
Tags: ABRASIVES AND ABRASIVE GRINDERS, FRICTION MATERIALS, inorganic fillers, POLYMERS