pH值与温度对WO_3纳米粉体制备的影响  

Effects of pH Value and Temperature on Producing WO_3 Nano-Powders

作　　者：王新刚[1] 张怀龙[1] 时斌[1] 李文静[1] 刘丽丽[1] 

机构地区：[1]长安大学材料科学与工程学院,陕西西安710061

出　　处：《中国钨业》2014年第2期19-23,共5页China Tungsten Industry

基　　金：国家自然科学基金资助(51177006)

摘　　要：以偏钨酸铵(AMT)、柠檬酸(CA)、乙二醇(EG)为原料,用溶胶-凝胶法制备了纳米WO3粉体。通过热重-差热分析(TG-DSC)、X射线衍射(XRD)、场发射扫描电子显微镜(SEM)、透射电子显微镜(TEM)、红外分析仪(FTIR)、比表面积测试(BET)等分析测试手段对粉体的结构、颗粒形貌和粒径进行表征,重点研究了pH值以及焙烧温度对粒径及形貌的影响。结果表明:当pH=1时,所制备出的WO3粉体呈多面体或球状,颗粒间的团聚较弱,在600℃烧结制备出的WO3粉体颗粒大小均匀,其平均粒径为40 nm左右。The tungsten trioxide was prepared by the sol-gel method with Ammonium metatungstate ,citric acid and glycol as raw materials. The phase composition, morphology and particle size of powders were analyzed by TG-DSC, XRD, FT-IR, SEM, TEM and BET. The effects of pH value and temperature on the particle size and morphology were mainly studied. The results show that the particle of WO 3 powder are polyhedron or spherical with weak aggolomerate between particles when the pH of sol solution is 1. After sintered at 600 ℃, the particle size of WO3 powder with average size of 40 nm is uniform.

关 键 词：三氧化钨 偏钨酸铵 溶胶凝胶 螯合反应 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TB383.3