OKUYAMA Yuji

写真a

Title

Associate Professor

Research Fields, Keywords

Solid State Ionics

Mail Address

E-mail address

Graduating School 【 display / non-display

  •  
    -
    2003.03

    Nagoya Institute of Technology   Faculty of Engineering   Graduated

Graduate School 【 display / non-display

  •  
    -
    2005.03

    Nagoya Institute of Technology  Graduate School, Division of Engineering  Master's Course  Completed

  •  
    -
    2008.03

    Nagoya Institute of Technology  Graduate School, Division of Engineering  Doctor's Course  Completed

 

Papers 【 display / non-display

  • Hydrogen Concentrations Measurement in Diesel Exhaust Gas by Using Solid Electrolyte Hydrogen Sensor

    Tsuneyoshi Koji, Takahashi Fusako, Iwai Tsubasa, Okuyama Yuji

    Transactions of Society of Automotive Engineers of Japan   48   1171 - 1175   2017

    Joint Work

     View Summary

    Hydrogen concentration in diesel exhaust gas was measured on engine test bench by using hydrogen sensor of solid electrolyte ceramics which can measure only hydrogen selectively by proton conduction, which enables measurement of hydrogen concentration in situ and continuously. In this study, the hydrogen concentration found to be different from that of measured DOC in front and behind. In addition, we also measured hydrogen concentration changes under loaded state and idle state.

    DOI CiNii

  • Hydrogen Concentration Measuring by Proton Conductor Ceramics with Heater

    TSUNEYOSHI Koji, TAKAHASHI Fusako, IWAI Tsubasa, OKUYAMA Yuji

    The Proceedings of Conference of Tokai Branch   2017   2017

    Joint Work

    DOI CiNii

  • Formation of CaFe<sub>2</sub>O<sub>4</sub> porous structure by addition of Zr in malic acid complex

    OBUKURO Yuki, OBATA Kenji, MAEDA Ryosuke, MATSUSHIMA Shigenori, OKUYAMA Yuji, MATSUNAGA Naoki, SAKAI Go

    Journal of the Ceramic Society of Japan   123   995 - 998   2015

    Joint Work

     View Summary

    The effect of Zr addition into malic acid complex was examined for the purpose of the improvement of microstructure and specific surface area of CaFe<sub>2</sub>O<sub>4</sub>. The CaFe<sub>2</sub>O<sub>4</sub> phase could be obtained for both unadded and Zr-added (5 and 10 mol % with respect to Fe) system by calcination of precursor derived from malic acid complex at 700°C which is almost 200°C lower than that of conventional solid-state reaction method. Among the examined products, only the 5 mol % Zr-added product revealed characteristic smaller grains connected three dimensional porous structures resulting in higher specific surface area compared with unadded and 10 mol % Zr-added products. XPS measurements revealed that there are no notable changes in valence state for all constituent elements. The obtained final product of 5 mol % Zr-added CaFe<sub>2</sub>O<sub>4</sub> is worth further investigate for various application from a view point of improved higher specific surface area and characteristic microstructure as well as the functionality of the material itself.

    DOI CiNii

  • Development of electromotive-force type hydrogen sensor for copper melting process

      53   171 - 176   2014.08

    Joint Work