Sensing Properties and Interfacial Structure of Solid Electrolyte CO2 Sensor Attached with Na2CO3-based Auxiliary Phase

  • SHIMANOE Kengo
    Department of Molecular and Materials Science, Graduate School of Engineering Sciences, Kyushu University
  • KIDA Tetsuya
    Department of Molecular and Materials Science, Graduate School of Engineering Sciences, Kyushu University
  • KAWATE Hideki
    Department of Molecular and Materials Science, Graduate School of Engineering Sciences, Kyushu University
  • MIURA Norio
    Advanced Science and Technology Center for Cooperative Research, Kyushu University
  • YAMAZOE Noboru
    Department of Molecular and Materials Science, Graduate School of Engineering Sciences, Kyushu University

書誌事項

タイトル別名
  • Sensing Properties and Interfacial Structure of Solid Electrolyte CO<sub>2</sub> Sensor Attached with Na<sub>2</sub>CO<sub>3</sub>-based Auxiliary Phase

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抄録

<p>Potentiometric devices for which a disc of NASICON (Na+ conductor, Na3Zr2Si2PO12) was attached with an auxiliary phase of Na2CO3 (I) or Na2CO3-BaCO3 (2 : 3 in molar ratio) (II) were investigated for CO2 sensing properties and the structure of hetero-junctions involved. SEM observation combined with EPMA analysis indicated that, for device (I), a corrosion layer (20-30 µm) rich in Na content was formed inside NASICON. The corrosion layer was estimated to consist mainly of Na2ZrSiO5 and Na2ZrO3 from separate experiments using powder samples. For device (II), in contrast, such a corrosion layer was hardly formed between the carbonate and NASICON. This difference in junction structure could account well for the difference in CO2 sensing capability at lower temperature between the devices.</p>

収録刊行物

  • Electrochemistry

    Electrochemistry 67 (12), 1258-1261, 1999-12-05

    公益社団法人 電気化学会

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