Preparation and properties of friction materials by using two kinds of fibrous industrial minerals

The basic technology and properties of the brake blocks made of modified needle-like wollastonite and fibrous sepiolite were intensively researched. The impact strengthes and fixed velocity friction of the brake blocks prepared by different recipes were tested. The testing results show that it is feasible for needle-like wollastonite and fibrous sepiolite to take the place of asbestos as the reinforced materials of friction materials. The braking effect of the brake blocks is the best when the ratio of the needle-like wollastonite to the fibrous sepiolite was 1∶6.