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采用化学共沉淀法制备了掺杂稀土铕的ATO纳米粉体。运用X射线衍射(XRD)、扫描电镜(SEM)等测试方法对ATO粉体进行表征,研究了制备工艺对粉体粒径和导电性能的影响,发现铕的摩尔掺杂比在0.5%～1%之间,600～700℃热处理温度下得到粉体的性能最佳,粉体的电阻率为243Ω.cm,颗粒尺寸为33.6 nm。掺杂前粉体的电阻率和颗粒尺寸分别为181Ω.cm和41.4 nm,掺杂后分别为243Ω.cm和33.6 nm。结果显示掺杂铕会使粉体的电阻率增加,但也能降低粒径,减少团聚。
ATO nanopowders doped with rare earth europium were prepared by chemical coprecipitation method. The effects of preparation process on the particle size and electrical conductivity of the powders were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the molar doping ratio of Eu is between 0.5% ~ 1 %, The best performance of the powder obtained at 600 ~ 700 ℃ heat treatment temperature, the resistivity of the powder is 243Ω.cm, the particle size is 33.6 nm. The resistivity and particle size of the doped powders were 181 Ω · cm and 41.4 nm, respectively, and were 243 Ω · cm and 33.6 nm, respectively. The results show that doped europium powder will increase the resistivity, but also reduce the particle size and reduce agglomeration.