Preparation and characterization of WO3 from ammonium paratungstate via hydrothermal method

• 来源期刊: 中国高等学校学术文摘·化学
• 关键词: ammonium paratungstate orthogonal design tungsten trioxide hydrothermal
• 年，卷（期）: 2006,（4）
• 页码范围: 389-392
• 页数: 4页
• 语种: 英文

摘要

Tungsten trioxide powder has been prepared from ammonium paratungstate via hydrothermal method using orthogonal and mono-level design of experiments.The effects of preparation process on particle size,specific surface area,crystal form and crystalline morphology of the tungsten trioxide was investigated by TEM and XRD etc.It was found that the optimum conditions of the preparation are hydrothermal crystallization for 8 h at 180℃,followed by vacuum drying at 45℃ and calcination at 500℃ for 2 h.The blank reference experiment shows that hydrothermal crystallization treatment favors the formation of hexagonal tungsten trioxide,and the tungsten trioxide powder sample prepared by this method has a high degree of crystallinity.