【摘要】 本文用交流阻抗法研究了Bi₂O₃-Y₂O₃系的阻抗谱。呈现特有的Warburg阻抗及其相关阻抗。在高氧分压下,电极过程由氧原子在三相线发生反应后直接进入电解质步骤控制;低氧分压下,由上述步骤和界面浓差极化共同控制,或仅由浓差极化控制。在氧分压为1.01×10^-10～1.01×10⁵Pa内时,Bi₂O₃-Y₂O₃系表现为纯氧离子导体。更多还原

【Abstract】 Complex impedance diagram on Bi₂O₃-Y₂O₃ system was investigated using AC impedance method. It was found that Ba₂O₃-based materials are characteristic of the Warburg impedance. The rate-limiting step of the electrode process at high Po₂ is the diffussion of oxygen atom into the solid electrolyte on the triple line. At low Po₂ the electrode process is controlled by diffusson as well as by concentration polarization, or controlled only by concentration polarization. Ba₂O₃-Y₂O₃ system characterized as a pure oxygen icn conductor at Po₂=1×1^-10～1×10⁵Pa更多还原