硅灰石 Wollastonite
硅灰石化学式CaSiO3，是一种稀有矿物资源，是独特的纤维状结果的无机粉体材料，具有良好的物理和化学性质。硅灰石有很高的白度，有极高的耐热性和介电性，有很低的吸水率和吸油率，有较好的耐碱性和良好的助熔性，有低生物耐受性、*无嗅等特点，是一种理想的白色补强功能性材料。
Wollastonite (CaSiO3) is a rare mineral resource of unique acicular structure with goodphysical and chemical properties. The main features of wollastonite are high brightness, high heat resistance and dielectric properties, low moisture and oil absorption rate good alkali resistance, non-hazardous and so on. It’s very good reinforcement filler.
基本性能 Typical Properties 参数 Typical Value
外观 Appearance 白色 White
形态 Morphology 针状 Acicular
分子量 Molecular Weight 116
比重 Specific Gravity 2.9
折射率 Refractive Index 1.63
PH值 PH (10％ Slurry) 9.9
水溶性 Water Solubility (g/100cc) 0.0095
莫氏硬度 MOHS Hardness 4.5
膨胀系数 Coefficient of Expansion 6.5 x 10 -6 mm/(mm.℃)
熔点 Melting Point 1540℃
导热系数 Transmissivity 0.1 w/m.k
超细硅灰石（XWS系列） Superfine Wollastonite (XWS Series)
硅灰石属于偏硅酸盐类，通常呈束状、放射状或纤维状集合体，是一种*无害的产品，超细
硅灰石粉具有遮盖力好、耐候性好，可替代
钛白粉、锌钛白、立德粉、沉淀
硫酸钡等
颜料，用在
建筑涂料、
工业涂料等高档涂料中，具有很好的抗腐蚀性和耐用性。
Wollastonite is a metasilicate mineral of unique acicular structure with good physical and chemical properties, which can replace titanium dioxide, zinc titanium dioxide, lithopone, precipitated barium sulfate and other pigments. It has good hiding rate, good weather and corrosion resistance when used in paint and coatings.
can be used to enhance the adhesion of coating, which can make the coating has better mechanical strength, persistence, and weather resistance to prevent the cracking.
超细硅灰石化学指标 Chemical Composition of Superfine Wollastonite
成分Component SiO2 CaO MgO Al2O3 Fe2O3 LOI
含量
Content (％) 49-51 41-43 ≤3 ≤1 ≤0.2 ≤4
超细硅灰石物理指标 Physical Properties of Superfine Wollastonite
规格Specification D50粒径
Particle Size D50 白度
Brightness 长径比
Aspect Ratio 松装密度
Loose Bulk Density
XWS325 ≤20μm 90％±2％ 4:1-5:1 ≤0.75g/cm3
XWS800 ≤12μm 90％±2％ 4:1-5:1 ≤0.70g/cm3
XWS1250 ≤8μm 90％±2％ 2:1-4:1 ≤0.60g/cm3
XWS2000 ≤5μm 90％±2％ 1:1-3:1 ≤0.55g/cm3
XWS3000 ≤4μm 90％±2％ 1:1-3:1 ≤0.55g/cm3
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