Preparation of SrO-Ta2O5-Pr2O3 system compounds and their electrical conductivity

Takaya Akashi; Michio Suzuki; Hisanori Yamane; Takashi Goto

doi:10.14853/pcersj.2002F.0.38.0

15th Fall Meeting of The Ceramic Society of Japan

DOI https://doi.org/10.14853/pcersj.2002F.0.38.0

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Host: The Ceramic Society of Japan

Preparation of SrO-Ta₂O₅-Pr₂O₃ system compounds and their electrical conductivity

Takaya Akashi, Michio Suzuki, Hisanori Yamane, Takashi Goto

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Keywords: Strontium tantalum oxide, Electrical conductivity, Praseodymium tantalum oxide, AC impedance spectroscopy, water vapor pressure, oxygen pressure

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Pages 38

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Abstract

Compounds in the SrO-Ta₂O₃-Pr₂O₃ system were synthesized by solid state reaction. No ternary compound was identified. Binary compound of Sr₅Ta_4-yO_15-d was prepared as a single pahse. The electrical conductivity of Sr₅Ta_3.8O_14.5 increased with increasing water vapor pressure, suggesting protonic conduction. The activation energy at lower temperatures was lower than that at higher temperatures. The ionic conduction of binary compound PrTa₃O₉ was observed.

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