摘要
Abstract
A ceramic phase Ba12Y4.67Ti8O35 was prepared by solid state reactions,the electrical properties of which were characterised by means of AC impedance spectroscopy,gas concentration cell as well as thermoelectric measurements. The measurements indicate that this material is an oxide ion/hole mixed conductor. At 700 ℃ ,the bulk conductivity of the material is ～ 2× 10- 3Ω - 1@ cm- 1.The impedance data measured at 700 ℃ in air,O2 and N2 atmospheres were analysed by using computer curve fitting,which explains that the ion diffusion impedance is hidden in air and O2 atmospheres because the oxide ion pathway is short circuited by electronic conduction. 关键词
交流阻抗谱,氧浓差电势,混合导体,等效电路拟合,Ba12Y4.67Ti8O35Key words
AC impedance, Oxygen concentration cell, Mixed conductor, Equivalent circuit fitting, Ba12Y4.67Ti8O35分类
化学化工
