Cryolite

Monoclinic, grayish white or pale yellow, its main ingredient is sodium fluoride, sodium fluoride and industry are as good as filler for increasing friction, friction materials, compatibility with resin well, with a coating, reduce wear, can form a layer of film on the friction surface, which can reduce the wear, avoid noise and fluorite ( CaF2 ) he wants to compare, has low wear rate, and the high price. Cryolite and fluorite in the friction material, is the coefficient of hardness is not high, but with increasing friction effect of packing varieties.