Jiangxi Branch source of ultrafine wollastonite powder factory direct bulk sales Product Details Origin:? Jiangxi silica content:? 51 (%) Grade:?? Excellence for thermal expansion coefficient: 6.5-11.8 categories:?? Ultrafine powder refraction coefficient : 1.63 Melting point:.? 1540 (℃) (℃) Mohs hardness:? 4.5-5.5 Density:? 2.75 (g / cm3) (g / cm3) Whiteness:?? 91 (% (%)% PH value: 8.5? I. Introduction wollastonite powder is a natural calcium silicate mineral, is a white crystalline powder, crystal is divided into two kinds of low temperature and high temperature, low temperature becomes high temperature at 1125 ℃, the crystal structure of needle-shaped particles , mostly fibrous particles, rods and radial aggregates having glass and pearl luster, white, mineral melting temperature 1540 ℃, Mohs hardness of 4.5-6.0, density 2.87-3.09, insoluble in water, soluble in hydrochloric acid and decomposition. Second, product specifications, Indicators Project Specifications Model Indicators Project wollastonite 1250 SiO2 content% ≥ 51 Fe (iron) content% ≤ 0.02 D97 (um) 10 Whiteness particles% ≥ 91 PH value 8.5% loss on ignition 2 Oil absorption 25-35 trioxide two aluminum oxide, calcium 0.25 CaO% ≥ 47 Appearance white powder solid cargo status Note: You can produce different brightness in accordance with customer demand, purity, fineness of wollastonite three wide Main purpose. applies for plastics, paints, rubber, ink, building materials, ceramics and other industries. Note: Powder Co., Ltd. Jiangxi Branch source can produce different brightness according to customer requirements, the fineness of the product.