硅灰石有針狀硅灰棉和硅灰粉兩種，針狀硅灰棉具有耐酸、耐堿化學腐蝕等。它的長徑范圍為18：1到20：1，具有增強作用，增強效果隨長徑比的增大而增加，硅灰石粉屬于鈣質偏硅酸鹽礦物，有較好的增摩效果。硅灰棉在無石棉制品相當六級石棉增強效果，硅灰棉和少量強度好的纖維等制造具有足夠的摩擦材料制品，因此得到了許多摩擦材料廠及公司廣泛應用。

Wollastonite

wollastonite needle-like wollastonite wollastonite powder with cottonand two, needle-like wollastonite cotton with acid, alkali and chemicalcorrosion. Its long diameter range from 18:1 to 20:1, has enhanced the role,reinforcing effect increases with the ratio of length to diameter increases,wollastonite powder belongs to the calcareous partial silicate minerals, hasgood friction-increasing effect. Silica fume cotton in the non-asbestosproducts is six asbestos reinforced effect of silica fume, cotton and a smallamount of strength of fiber manufacturing with friction material productsenough, so had many friction material factory and the company are widely used.