摘要：采用机械力化学法, 在水介质中采用滑石研磨和滑石与TiO₂共混研磨方式制备滑石-TiO₂复合粉体, 探讨影响复合粉体颜料性能的工艺因素, 表征复合粉体的颜料性能与显微结构。结果表明:滑石的颗粒粒径随研磨强度的增加呈先减小后增大、再逐渐趋于稳定的规律, 可满足与TiO₂复合的基体要求;滑石-TiO₂复合粉体表面滑石颗粒紧密包覆TiO₂颗粒层, 具有与钛白粉相似的颜料性能;TiO₂质量分数为70%的滑石-TiO₂复合粉体的遮盖力为10.45 g/m², TiO₂质量分数为66%的复合粉体的遮盖力为12.50 g/m², 2种复合粉体的遮盖力分别达到金红石型TiO₂的105.26%和88%;滑石-TiO₂复合粉体紫外线屏蔽性能与金红石钛白粉相当。

关键词：滑石；二氧化钛；复合粉体；颜料性能

Abstract：In water medium, talc-TiO₂ composite particles were made with mechano-chemical method by ways of talcin grinding and mixed grinding of the talc and TiO₂. The factors on preparing process of the talc-TiO₂ composite particles were studied and the structure and pigment properties of it were characterized. The results show that with the mechanical energy gained on the surface of talc particles, the particle size of it decreases firstly, then increases, and decreases slightly at last, which meets the composite requirements with TiO₂. TiO₂ particles tightly coates talc particles' surface and the composite particles has a similar pigment properties like titanium dioxide. Talc-TiO₂ composite powders contained 70% rutile TiO₂ have the hiding power of10.45 g/m², and the ones contained 66% have the hiding power of12.50 g/m². Tiding power rates of the two kinds of composite powders are 105.26% and 88%, respectively, of rutile TiO₂, and the ultraviolet absorption capacity of composite powders are the same as titanium dioxide.

Keywords: talc；titanium dioxide；composite particles；pigment property