ZHOU Kun1a，b，2a，b， WANG Xiaoqi1a，b，2a，b， SONG Guolin1a，b， TANG Guoyi1a，b，2a，b
（1. a. Advanced Materials Institute； b. Shenzhen Key Laboratory of Clean Production， Graduate School at Shenzhen， Tsinghua University， Shenzhen 518055； 2. a. Laboratory of Advanced Materials； b. Department of Materials Science and Engineering， Tsinghua University， Beijing 100084， China）
Abstract：To obtain the powders with high reflectance and emissivity, zirconia particles were coated with titania precursor by sol-gel method.After calcination, zirconia-titania composite powders were synthesized. The prepared powders were studied through thermal, phase and morphological analysis, and their reflectance and emissivity were tested. The results show that the reflectance of the composite powders is about 10% higher than that of the uncoated powders in wavelength range from 0.41 to 2.5 μm. The emissivity decreases in wavelength range from 2.5 to 20 μm.But it shows little change and keeps high value in the wavelength range from 8 to 13 μm. The composite powders with mass fraction of 4.8% titania possess the optimum optical properties.
Keywords：zirconia; titania; reflectance; emissivity
文章编号：1008-5548（2013）04-0010-05
DOI：10.3969/j.issn.1008-5548.2013.04.003
收稿日期：2013-02-02，修回日期：2013-02-25，在线出版时间：2013-08-25。
基金项目：国家自然科学基金项目，编号：50572045。
第一作者简介：周坤(1987—)，男，硕士研究生，研究方向为无机纳米材料。E-mail: zhouk1988@qq.com。
通信作者简介：唐国翌（1954—），男，博士，教授，研究方向为金属材料电致塑性加工技术及相变储能材料等。 E-mail: tanggy@sz.tsinghua.edu.cn。
