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High oxide ion conduction in sintered Bi2O3 containing SrO, CaO or La2O3

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Abstract

Ionic conduction in sintered oxides of the system Bi2O3-SrO was investigated by measuring the conductivity and ion transference number under various conditions. The ion transference numbers were measured by an oxygen concentration cell employing the specimen as the electrolyte.

It was found that the solid solution containing 20≈40 mole% SrO which had a rhombohedral structure was an almost pure oxide ion conductor under a relatively high partial pressure of oxygen, and that the conductivity was several times higher than that of stabilized zirconias at the same temperatures up to 800°C. Oxide ion conduction was confirmed also by quantitative determination of generated O2 from the anode of the oxygen concentration cell during discharge.

The sintered specimens of the systems Bi2O3-CaO and Bi2O3-La2O3 were found also to be oxide ion conductors, and the ion transference numbers were greater than 0.9.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Nagoya University, Nagoya, Japan

    T. Takahashi, H. Iwahara & Y. Nagai

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  1. T. Takahashi
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  2. H. Iwahara
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  3. Y. Nagai
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Takahashi, T., Iwahara, H. & Nagai, Y. High oxide ion conduction in sintered Bi2O3 containing SrO, CaO or La2O3 . J Appl Electrochem 2, 97–104 (1972). https://doi.org/10.1007/BF00609125

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  • DOI: https://doi.org/10.1007/BF00609125

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