Abstract: Yttrium aluminum garnet powders were synthesized by gel combustion method taking yttrium nitrate hexahydrate， aluminum nitrate and citric acid as main raw materials, and a mixture of deionized water and ethanol as the solvent. Precursor xerogel and yttrium aluminum garnet powders were characterized by means of SEM, TG-DTA, IR and XRD. The influence of mixed solvents on gel combustion synthesis of yttrium aluminum garnet powders were investigated. The effect of calcination temperature and holding time on properties of yttrium aluminum garnet powders were studied. The results indicate that mixed solvents have significant effect on the morphology and dispersion of as-synthesized yttrium aluminum garnet powders. Similar spherical yttrium aluminum garnet powders about 60 nm are synthesized at 900 ℃and calcined 2 h in mixed solvents with the volume ratio of deionized water and ethanol of 2 ∶ 1. Calcination temperature and holding time have profound effects on crystalline size and lattice parameters of as-synthesized yttrium aluminum garnet powders.

Keywords: mixed solvent; gel combustion method; calcination temperature; yttrium aluminum garnet powder

中图分类号：TB383         文献标志码：A

文章编号：1008-5548（2014）03-0039-05

DOI:10.13732/j.issn.1008-5548.2014.03.009

收稿日期：2013-08-08， 修回日期：2013-09-05，在线出版时间：2014-06-24。

基金项目：四川省科技厅科技支撑计划项目 ， 编 号 ：2012JY0045，2011SZZ029，2012SZZ025；四川省教育厅青年项目，编 号：11zb135；绵阳市科技局重点项目，编号：12J005。

第一作者简介：李小伍（1983—），男，硕士，助教，研究方向为无机功能材料。 E-mail:lxw20050332@163.com。

通信作者简介：魏成富（1956—），男，硕士，教授，研究方向为高性能结构材料。 E-mail:wcf@mail.xhu.edu.cn。