抄録
The dielectric properties of Ca-stabilized ZrO2 (Zr0.9Ca0.1O2-δ, 10CSZ) which is an oxide ion conductor were investigated. Numerical analyses for the frequency dependence of dielectric constant (εr′) and dielectric loss factors (εr″) revealed that the dielectric properties were made up of Debye-type polarization due to dopant-vacancy associates [Cazr″-Vo¨] and interfacial polarization at electrolyte-electrode. Two Debye-type relaxations were observed. This result implies the existence of two dopant-vacancy associates with different distances. Moreover, by using the dielectric constants obtained from the numerical analysis, the frequency dependences of ac conductivity (σac) and dielectric loss tangent (tanδ) were also explained.
