Electrical properties of transition-metal-doped YSZ

Tatsuya Kawada, N. Sakai, H. Yokokawa, M. Dokiya

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120 Citations (Scopus)

Abstract

The electrical properties of Mn-doped YSZ (yttria stabilized zirconia) were investigated. The polarization cell was employed to determine the electronic conductivity of Mn 4 mol% doped YSZ (8 mol% Y2O3). The observed conductivities were 2.6×10-4 S cm-1 in air (p-tyee) and 1×10-4 S cm-1 at the oxygen pressure of 10-14 Pa (n-type). The hole conductivity was hig her than that of Mn-free YSZ by about one order of magnitude. The transference number of oxide ion was higher than 0.99 in the oxygen potential range from 10-15 to 105 Pa. The ionic conductivity showed oxygen-pressure dependence, which was explained by oxygen-vacancy formation due to the valence change of Mn ion in the YSZ lattice. The electrochemical impedance was studied with Pt electrode on Mn-doped surface of YSZ. It was suggested that the mixed valence state of the Mn ion affected the response of the electrode.

Original languageEnglish
Pages (from-to)418-425
Number of pages8
JournalSolid State Ionics
Volume53-56
Issue numberPART 1
DOIs
Publication statusPublished - 1992 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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