... We supply wollastonite powder: 1.Metallurgical Grade 2.Filling Grade 3.Ceramics Grade We have more than 20 years experience ... .008%,P ≤ 0.008%,H2O≤0.5%,LOI≤2%200mesh,325mesh(mesh can be adjusted according to the ... customer's requirements)2.Filling GradeSpecification: SiO2≥ 50%,CaO≥44%,MgO≤ ... SiO2≥ 49%,CaO≥45%,Fe2O3≤0.3%,LOI≤2.5%325mesh(mesh can be adjusted according to the ...