Journal of Materials Science

, Volume 41, Issue 19, pp 6435–6440 | Cite as

Water vapor absorption and proton conductivity of (Ba1−xLax)2In2O5+x

  • Katsuyoshi KakinumaEmail author
  • Aya Tomita
  • Hiroshi Yamamura
  • Tooru Atake


The proton conductivity of (Ba1−xLax)2In2O5+x system has been investigated as a function of the La content, temperature and amount of absorbed water. The proton conductivity increased with La content up to x = 0.10, to reach a maximum of 1.12 × 10−5 (S/cm) at 400 °C. From that point on, it decreased. From the results of thermogravimetry and mass spectra, we confirmed that the water was absorbed in the (Ba1−xLax)2In2O5+x system, in a maximum quantity of 0.14 mol/mol (sample). The proton conductivity increased monotonically with the quantity of water uptake, suggesting that this variable is one of the dominant parameter of proton conductivity in this system.


Oxygen Vacancy Oxygen Partial Pressure Proton Conductivity Water Vapor Pressure Mobile Proton 



This study was supported by the High Technology Research Project at KANAGAWA University from the Ministry of Education, Science, Sports and Culture and by a Grant-in-Aid for Scientific Research from the same Ministry.


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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  • Katsuyoshi Kakinuma
    • 1
    Email author
  • Aya Tomita
    • 1
  • Hiroshi Yamamura
    • 1
  • Tooru Atake
    • 2
  1. 1.Department of Applied Chemistry, Faculty of EngineeringKanagawa UniversityKanagawa-ku, YokohamaJapan
  2. 2.Materials and Structures LaboratoryTokyo Institute of TechnologyMidori-ku, YokohamaJapan

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