Citation:
Huang Keqin, Wang Changzhen. AC COMPLEX IMPEDANCE STUDY ON SOLID STATE ELECTROLYTE OF Bi2O3-Y2O3[J]. Chinese Journal of Applied Chemistry,
;1992, 9(2): 56-59.
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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
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