INVESTIGATION ON TEMPERATURE DISTRIBUTION AND THERMAL STRESS OF BETA prime -ALUMINA UNDER CONDITIONS OF SODIUM ION TRANSPORT.

Hiroyuki Kawamoto

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

Abstract

Temperature distribution and thermal stress in a sodium beta prime -alumina solid electrolyte under conditions of sodium ion transport are calculated using finite element method to clarify the Mode I degradation. A critical current density determined by the thermal stress is about 15A/cm**2 for the typical beta prime -alumina plate with 2 mm thickness in a sodium/sodium cell, even if no substantial crack exists at the surface of the beta prime -alumina. It is also shown that there is a formation of a high resistance layer at the surface of the beta prime -alumina, a partial formation of an electrically insulating film between the beta prime -alumina and sodium interface due to low wettability and/or the existence of the crack reduce the critical current density.

Original languageEnglish
Title of host publicationProceedings - The Electrochemical Society
EditorsAlbert R. Landgrebe, Robert D. Weaver, Rajat K. Sen
PublisherElectrochemical Soc
Pages163-175
Number of pages13
Volume87-5
Publication statusPublished - 1987
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Kawamoto, H. (1987). INVESTIGATION ON TEMPERATURE DISTRIBUTION AND THERMAL STRESS OF BETA prime -ALUMINA UNDER CONDITIONS OF SODIUM ION TRANSPORT. In A. R. Landgrebe, R. D. Weaver, & R. K. Sen (Eds.), Proceedings - The Electrochemical Society (Vol. 87-5, pp. 163-175). Electrochemical Soc.