Preparation of Ultrafine Tungsten Powder by Sol-Gel Method

作     者：Yuxian HAN Tai QIU Tao SONG 

作者机构：College of Materials Science and Engineering Nanjing University of Technology Nanjing 210009 China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2008年第24卷第5期

页      面：816-818页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Sol-gel method Tungsten trioxide Deoxidize Ultra-fine tungsten powder 

摘      要：Sol-gel method was employed for the preparation of nanoscale tungsten powder. The effects of different preparation conditions on particle size were discussed and the optimum preparation condition was found. The products were characterized by X-ray diffraction, scan electron microscopy and so on. The results show that the intermediate is monoclinic WO3, its particle shape is approximately spherical, and the particle size distribution is narrow. The average particle size is about 60 nm. After deoxidization, WO3 turns into cubic tungsten powder with small particle size （average particle size about 120 nm） and narrow size distribution.