Journal of the European Ceramic Society ( IF 5.7 ) Pub Date : 2020-06-11 , DOI: 10.1016/j.jeurceramsoc.2020.06.023 Julia Ramírez-González , Anthony R. West
The electrical properties of cubic, calcia-stabilised zirconia ceramics, CaxZr1-xO2-x: 0.12 ≤ x ≤ 0.18 have been investigated using impedance spectroscopy to separate bulk, grain boundary and electrode contact impedances. The most appropriate equivalent circuit to characterise the bulk response required inclusion of a dielectric component, represented by a series RC element, in parallel with the oxide ion conductivity represented by a parallel combination of a resistance, capacitance and constant phase element. The dielectric component may be attributed to defect complexes involving immobile oxygen vacancy pairs whereas long range conduction involves single oxygen vacancies.
中文翻译:
氧化钙稳定的氧化锆陶瓷的电性能
已使用阻抗光谱法研究了立方,氧化钙稳定的氧化锆陶瓷Ca x Zr 1-x O 2-x的电性能:0.12≤x≤0.18,以分离体积,晶界和电极接触阻抗。表征体积响应的最合适的等效电路需要包括一个由串联RC元件代表的介电成分,与一个由电阻,电容和恒定相元件的并联组合所代表的氧化物离子电导率并联。介电成分可归因于缺陷络合物,其中涉及固定的氧空位对,而远距离传导则涉及单个氧空位。