煅烧高岭土-TiO_2复合材料的制备及表征

以煅烧高岭土和TiO2为原料,采用机械力化学法制备煅烧高岭土-TiO2复合材料。以遮盖力和吸油量为指标,优化煅烧高岭土-TiO2复合材料的制备工艺,并表征其颜料性能。结果表明:复合过程中共混研磨时间、球料质量比和搅拌磨转速对复合材料的颜料性能影响显著。制备的煅烧高岭土-TiO2复合材料遮盖力为纯钛白粉的88.4%,白度也与其接近,且吸油量适中。该材料用于内墙涂料显示出较好的颜料性能,能以一定比例替代钛白粉使用。

Preparation and Characterization of Calcined Kaolin-TiO2 Composites

The calcined kaolin-TiO2 composites (CKTC) was prepared through mechano-chemical method with TiO2 and calcined kaolin as raw materials. The preparing process was optimized according to the hiding power and oil adsorption, and its pigment properties were characterized as well. The results showed that the co-grinding time of calcined kaolin and TiO2, mass ratio of grinding media to powder and stirrer rotating speed had significant influences on pigment properties of CKTC. The hiding power of CKTC was 88.4% of titanium dioxide, the oil adsorption approximated to TiO2, and the whiteness was also appropriate. The effect when CKTC used in indoor paint was well and it could displace titanium oxide with a certain proportion.