沉淀法制备ITO粉体及其性能研究

以InCl3、SnCl4、尿素和氨水为主要原料，采用化学共沉淀法制备出ITO粉体，探讨了沉淀剂种类和煅烧温度对ITO粉体性能的影响。结果表明：采用氨水可制备针状、粒度分布窄的纳米粉体，沉淀剂为尿素时则为块状、粒度分布较宽的微米粉体；随煅烧温度的提高，粉体的比表面积呈下降趋势，从700℃的28．65m2／g下降到900℃的12．23m2／g；氨水作沉淀剂且煅烧温度为700℃时可获得粒度均匀、分散性好、物相单一的纳米ITO粉。

Preparation and Properties of ITO Powder by Chemical Co-precipitation

Using InC13 , SnC14, urea and ammonia as the main raw materials, ITO powders were prepared by chemical coprecipitation. The effect of precipitant and calcination temperature on the properties of ITO powder was investiga- ted. The results indicate that nanometer ITO powder with acicular morphology and a narrow size - distribution has been produced by ammonia, while ITO powder is block - shaped, reaching micrometer with a relatively wide size - distribution when urea was used. As calcination temperature increased from 700 ℃ to 900 ℃, surface area of the powder decreased from 28.65 m2/g to12.23 m2/g, showing a downward trend;nanometer ITO powder with uniform size, dispersion and sole phase could be made by ammonia under calcination temperature of 700 ℃.