摘要：通过湿法机械研磨白炭黑进行解聚与分散以及白炭黑与TiO₂共混研磨制备白炭黑-TiO₂复合粉体,对制备过程中的各种因素进行优化,对白炭黑-TiO₂复合粉体的结构、粉体颜料性能以及紫外光作用下的光学性能进行表征。结果表明:影响白炭黑与TiO₂研磨复合的因素及优化条件是,白炭黑中位粒径为2.288μm,球料质量比为5∶1,浆体中粉体颗粒的质量分数为18%,研磨时间为60 min,分散剂质量分数为6%;白炭黑-TiO₂复合颗粒以TiO₂在白炭黑团聚体表面包覆为特征;白炭黑-TiO₂复合粉体与钛白粉颜料性能相似,并因白炭黑与TiO₂的协同作用而具有紫外线屏蔽功能。

关键词：白炭黑；二氧化钛；复合粉体；颜料性能；紫外屏蔽

Abstract： Silica-TiO₂ composite particles were prepared through dispersing and depolymerizing the silica as well as grinding mixed particles of silica and TiO₂ by the method of wet grinding. Influencing factors in the process of preparation were optimized. The structures of silica -TiO₂ composite particles， property of pigment and ultraviolet shielding property were characterized. The results show that the factors affecting grinding composition of silica and TiO₂ and the optimal condition are that the median diameter of silica is 2.288 μm，the mass ratio of grinding media to materials is 5∶1， the mass ratio of particles in slurry is 18%， the grinding time is 60 min， and the mass ratio of particles in dispersant is 6% . The feature of silica-TiO₂ composite particles is TiO₂ coated on the surface of silica particles. The silica-TiO₂ composite particles have similar pigment property as TiO₂， and have ultraviolet shielding property for the synergistic reaction between silica and TiO₂. 

Keywords: silica； titanium dioxide； composite particle； property of pigment； ultraviolet shielding