TiO2-coated wollastonite composite pigments were prepared by the mechano-chemical grinding of wollastonite and TiO2 powder together in a wet ultrafine stirred mill. X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and infrared spectra were used to investigate the microstructures and morphologies of the composite and the reaction mechanism. The results indicate that the TiO2-coated wollastonite composite pigments have similar properties to titanium dioxide pigment, showing much better properties than dry and wet mixing of wollastonite and TiO2. The hiding power of TiO2-coated wollastonite composite pigments (45% TiO2) is 17.97 g/m2, reaching 81.08% of titanium dioxide. A firm combination between wollastonite and TiO2 is obtained through a surface dehydroxylation reaction during the mechano-chemical method.
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机译：通过硅灰石和TiO2粉末在湿超细搅拌磨机中将TiO2涂覆的硅灰石复合颜料制备。 X射线衍射，扫描电子显微镜，X射线光电子能谱和红外光谱用于研究复合材料的微观结构和形态和反应机理。结果表明，TiO2涂覆的硅灰石复合颜料对二氧化钛颜料具有相似的性质，显示出比硅灰石和TiO2的干燥和湿混合的更好的性能。 TiO2涂覆的硅灰石复合颜料（45％TiO 2）的隐藏能力为17.97g / m 2，达到二氧化钛的81.08％。通过在机械化学方法期间通过表面脱羟基化反应获得硅灰石和TiO 2之间的牢固组合。
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