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
硅灰石矿纤（XWA系列） Wollastonite Mineral Fiber （XWA Series）
硅灰石是*一的成针状纤维结构的白色
填充料，其长径比可达到20:1，广泛的应用在各种
塑料制品中，可以提高制品的电绝缘性、冲击强度、抗拉强度，改善制品的线性拉伸和模收缩率，可以部分或完全取代传统玻纤，起到明显的增强补强作用。
Wollastonite is the only a pure white filling material with acicular fiber structure, the aspect ratio can up to 20:1, it was widely used in plastics, It can improve the electric insulation, impact strength and tensile strength of products, and it can improve the linear stretching and die shrinkage of products. It can replace the traditional glass fiber partially or completely to offer strengthening significantly.
硅灰石矿纤化学指标 Chemical Composition of Wollastonite Mineral Fiber
成分Component SiO2 CaO MgO Al2O3 Fe2O3 LOI
含量
Content (％) 49-51 41-43 ≤3 ≤1 ≤0.2 ≤4
硅灰石矿纤物理指标 Physical Properties of Wollastonite Mineral Fiber
规格Specification 纤维直径
Fiber Diameter 白度
Brightness 长径比
Aspect Ratio 松装密度
Loose Bulk Density
XWA6 ≤6μm 86％±2％ 8:1-10:1 ≤0.40g/cm3
XWA9 ≤9μm 86％±2％ 8:1-10:1 ≤0.45g/cm3
XWA11 ≤11μm 86％±2％ 8:1-10:1 ≤0.45g/cm3
XWA13 ≤13μm 86％±2％ 8:1-10:1 ≤0.50g/cm3
XWA19 ≤19μm 86％±2％ 10:1-12:1 ≤0.55g/cm3
XWA24 ≤24μm 86％±2％ 10:1-12:1 ≤0.60g/cm3
XWA28 ≤28μm 86％±2％ 10:1-12:1 ≤0.60g/cm3
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
改性硅灰石系列 Modified Wollastonite Series
在XWA和XWS产品的基础上，经过表面处理，提高产品与树脂的结合能力，同
滑石粉碳酸钙等其他矿物相比拥有更好的强度与刚度，可推动下游企业的制品更轻更薄，满足汽车船舶航空等领域轻量化的需求。
Surface modification of BA & AT series, has better dispersivity and processing fluidity, stronger bonding force with surface of organic polymer substance, improved mechanical property and ageing resistance when applied in composite materials. Wollastonite has better strength and stiffness than Calcium carbonate and Tale. It helps the automotive industry to lightweight.
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