Abstract： Taking rutile titanium dioxide as the pigment， the paste was prepared according to a certain formula and method. The wet film was used for sample preparation. A spectrophotometer was used for detection of the reflectivity of samples. The hiding power of samples was directly characterized by precise color quality control software. Key factors affecting the hiding power measurement were optimized. The results show that taking acrylic varnish as the paint vehicle， rutile titanium dioxide paint slurry samples are suitable for the method of characterizing hiding power directly using spectrophotometer at the conditions that the volume fraction of pigment is 16% ， the time for oscillatory grinding is 90 min， and the wet film thickness is 100 μm.

Keywords: titanium dioxide; hiding power; spectrophotometer

中图分类号：TQ621.1⁺2          文献标志码：A

文章编号：1008-5548(2015)02-0021-03

DOI:10.13732/j.issn.1008-5548.2015.02.005

收稿日期：2014-07-11， 修回日期：2014-07-28，在线出版时间：2015-04-17。

基金项目：国家国际科技合作项目，编号：2010DFB43290；云南省科技计划项目，编号：2012ZE004。

第一作者简介：李海艳（1984—）， 男， 助理工程师， 研究方向为氯化法钛白粉生产工艺技术及产品应用。电话：0878-4819526， E-mail：ynszlhy@126.com。

通信作者简介：汪云华（1972—），男，博士，教授级高级工程师，研究方向为有色金属采矿、选矿、冶炼及氯化法钛白粉生产工艺技术。 电话：0878-4819526，E-mail：297374220@qq.com。