摘要
建立了理想的多晶快离子导体的显微结构模型,根据模型推导出了简单的多晶离子导体的电阻率与晶界密度和晶界电导性的关系式。由该模型出,通过对其等效交流阻抗电路的简化和交流阻抗的计算,说明了多晶快离子导体材料的复平面交流阻抗谱形状随测试温度的变化和晶界性质对这种变化的影响。
The ideal microstructure model of polycrystalline fast ionic conductors is estab-lished.According to the model, a simple formula reflecting the relation between the resistivity of the conductors and grain boundary properties(boundary density and its conductivity)is derived. Variation of the complex plane A.C.impedance spectra of polycry-stalline ionic conductors with test temperature and the effect of grain boundary prop-erties on such variation are explained. The derived relation between the ionic resisti-vity and the grain boundary properties is confirmed qualitatively by numerous litera-tures and the author's test results on hot-pressed Beta-alumina. The effect of grain boundary properties on A.C. impedance properties of ionic. conductors is also verified by the impedance spectrum measurements of hot-pressed Beta-alumina with different microstructural features and grain boundary resistivities.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1991年第3期210-219,共10页
Journal of The Chinese Ceramic Society
关键词
快离子导体
晶体
晶界
电导
模型
fast ionic conductors
microstructure
grain boundary
model
