Electrical conductivity of proton conductive ceramics under reactor irradiation

Tatsuo Shikama, Bun Tsuchiya, Shinji Nagata, Kentaro Toh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Possibility of converting radiation-energy such as energy of gamma-rays directly into electricity was surveyed with proton conductive ceramics in a fission reactor. Proton Conductive Ceramics, SrCe0.95Yb 0.05O3-δ, BaCe0.9Y0.1O 3-δ, and CaZr0.9In0.1O 3-δ were irradiated in a fission reactor, JMTR and their electrical conductivity and radiation induced electrical motive force were measured under irradiation. On some of specimens, a hydrated zirconium electrode was attached for studying effects of hydrogen on the electrical conductivity and the radiation induced electromotive force. An increase of the electrical conductivity was clearly observed at higher temperatures in specimens with a hydrated electrode. The experimental results are indicating that the electron conductivity is dominant below 400K and the conventional radiation induced electrical conductivity, whose magnitude is nearly proportional to the electronic excitation dose rate of radiation field, was observed. In the meantime, the base electron conductivity will be reduced by the radiation effects. Above 450-480K, the protonic conductivity is dominant in the present proton conductive ceramics and enhancement of proton diffusion was taking place under the irradiation. Increase of the electromotive force by the existence of hydrogen was not clearly observed in the present study, however, there was some possibility of contribution of the proton conduction to the RIEMF above 450K.

Original languageEnglish
Title of host publicationCeramics in Nuclear and Alternative Energy Applications - A Collection of Papers Presented at the 30th International Conference on Advanced Ceramics and Composites
Pages145-156
Number of pages12
Volume27
Edition5
Publication statusPublished - 2006 Dec 1
EventCeramics in Nuclear and Alternative Energy Applications - 30th International Conference on Advanced Ceramics and Composites - Cocoa Beach, FL, United States
Duration: 2006 Jan 222006 Jan 27

Other

OtherCeramics in Nuclear and Alternative Energy Applications - 30th International Conference on Advanced Ceramics and Composites
CountryUnited States
CityCocoa Beach, FL
Period06/1/2206/1/27

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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