Silica content of 49.8 Origin Jiangxi refraction coefficient of thermal expansion coefficient of 6.5x10-6 1.63 PH value 7-9 whiteness 88-91 density 2.75 melting point of 1540 Mohs hardness of 4.5-5.5 grade class product category needle needle silica fume powder Products powder Product Information Product Name: needle wollastonite powder Specifications: AT-0028 2000 mesh silica: ≤49.8% calcium oxide: ≥47.2% Whiteness: ≥91% customer specifications determined project cooperation 400M 800M 1250M 2000M 2500M Bags Numbers bags No. AT-0020 AT-0023 AT-0026 AT-0028 AT-0030 SiO2 silica% ≤ 49.8 49.8 49.8 49.8 49.8 CaO CaO% ≥ 47.2 47.2 47.2 47.2 47.2 Fe2O3 iron sesquioxide% ≤ 0.2 0.02 0.02 0.02 0.02 MgO magnesia% ≤ 0.25 0.25 0.25 0.25 0.25 Al2O3 alumina% ≤ 0.25 0.25 0.25 0.25 0.25 PH Value PH value 7-9 7-9 7-9 7-9 7-9 Whiteness Whiteness% ≥ 90 91 92 92 92 True Specific Gravity true specific gravity (t / m3) 2.8 2.8 2.8 2.8 2.8 Postulate Specific Gravity proportion of false (t / m3) 0.6-1.4 0.6-1.4 0.6-1.4 0.6-1.4 0.6-1.4 Moh's Hardness Mohs hardness of 4.5-5.5 4.5-5.5 4.5-5.5 4.5-5.5 4.5-5.5 Refraction Coefficient refraction coefficient 1.63 1.63 1.63 1.63 1.63 Melting Point Melting point ℃ 1540 1540 1540 1540 1540 Density Density 2.75 2.75 2.75 2.75 2.75 Coefficient of Thermal Expansion Thermal expansion coefficient of 6.5 * 6.5 * 10-6 10-6 6.5 * 10-6 6.5 * 10-6 6.5 * 10-6 Length Density aspect ratio of 20-30: 1 10-20: 1 10-20: 1 10-15: 1 10-15: 1 Loose Density Bulk Density (g / cm2) 0.1-0.15 0.2-0.25 0.25-0.28 0.35-0.4 0.4-0.5 Compacted Density Tap Density (g / cm2) 0.8-0.85 0.8-0.85 0.8-0.85 0.8-0.85 0.8-0.85 Loss on lgnition loss on ignition% 2 2 2 2 2 Moisture Content Moisture% ≤ 0.3 0.3 0.3 0.3 0.3 Sieve Test 45μm sieve residue (20μm) ≤ 0.02 0.001 0 0 0 Particle Size diameter D97 (μm) ≤ 40 16 10 6 5 Product Shape product shape fibrous fibrous fibrous fibrous fibrous Appearance Appearance White powder White powder White powder White powder White powder Note: You can produce different brightness in accordance with customer demand, purity, fineness of wollastonite. Main purpose is widely used in composite materials (electronic components, packaging materials, high-performance rubber products, automotive shell, mold), paper, ceramics, building materials, rubber, plastics, paints, coatings, chemicals, welding, nylon, metallurgy protection slag and other areas as well as asbestos substitutes welcome you to inquire nationwide toll-free: 400-663-9796 Mobile: 15979546846 Mr. Zhang Tel: 0795-2502848 / 2527858 Company Website: http: //www.jxaote.cn company wollastonite trading network Pu: http: //shop.99114.com/41320021