ISSN 1008-5548

CN 37-1316/TU

Journal Online  2015 Vol.21
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Preparation of High Purity SiO2 Powders by Precipitation Method

YAN Ying1 , ZHOU Yongheng1 , DING Jiaxing2

(1. Guangdong Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou 510006, China; 2. Hongwei Quartz Product Co., Ltd, Lianyungang 222313, China)

Abstract: Self-made fluorosilicic acid and ammonia were used to prepare high purity SiO2 powders by the method of substep precipitation. The effect of pH of the solution, concentration of ammonia and pickling conditions on the purity of SiO2 powders was investigated. The results indicate that after leaching the precipitation in the fluorosilicic acid solution with pH value of 7, the high purity SiO2 nano-powders containing regular metal impurity with the mass fraction of only 1.8×10-6 can be obtained by acid pickling of the precipitation continuously reacting with the ammonia.

Keywords: high purity silica powders; precipitation method; fluorosilicic acid

中图分类号:TB383         文献标志码:A

文章编号:1008-5548(2015)04-0045-03

DOI:10.13732/j.issn.1008-5548.2015.04.010

收稿日期:2014-10-20, 修回日期:2014-11-03,在线出版时间:2015-08-26。

基金项目:国家自然科学基金项目,编号:21306097;高等学校博士点专项科研基金项目, 编号:20121010010; 清华大学自主科研计划项目, 编号:20111080971。

第一作者简介:严颖(1991—),女,硕士研究生,研究方向为非金属材料的制备。 E-mail:413686933@qq.com。

通信作者简介:周永恒(1971—),男,高级工程师,研究方向为石英材料制备技术。 E-mail: yhzhou@scnu.edu.cn。