摘要
以 Sn Cl4 · 5 H2 O和 Sb Cl3为原料 ,采用共沉淀法制得了纳米级 Sn O2 超细粉 .运用 DSC-TG、XRD和TEM等观测手段对微粉末进行了表征 .比较系统地研究了共沉淀温度和 p H值对粉末颗粒度和电阻的影响规律 .研究结果表明 ,合成的纳米级 Sb/Sn O2 粉体粒度分布比较均匀、分散性较好 ,具有金红石结构 ;共沉淀温度对 Sb/Sn O2 微粉末的粒度和电导性能影响较小 ,合适的共沉淀温度为 45～ 70℃ ;粉末粒度在 p H为 4～6之间出现 1个极大值 ,该 p H值下所对应的粉末电阻较小 ,同时考虑 p H值对粒度与电性能的影响 ,最佳 p H值范围为 3～
Nanometer sized SnO 2 powders were prepared by a chemical coprecipitation method using SnCl 4·5H 2O and SbCl 3 as precursors. The characteristics of the powders were investigated by DSC TG, XRD and TEM. The influences of coprecipitation temperature and pH value on the particle size and powder resistance have been investigated. The results indicate that the powders with a homogenous particle size distribution and a good dispersivity are tetragonal rutile type antimony doped tin oxide polycrystalline particles. The particle size and powder resistance are insensitive to the coprecipitation temperature. The proper coprecipitation temperature is about 45~70 ℃. The particle size reaches a maximum at pH=4~6 whereas the corresponding resistance of the sample is smaller. The optimal range of pH value is 3~5, when both particle size and electrical property are in consideration.
出处
《应用化学》
CAS
CSCD
北大核心
2002年第2期163-167,共5页
Chinese Journal of Applied Chemistry
