Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4

Tatsumi Ishihara, J. Hyodo, H. Schraknepper, K. Tominaga, S. Ida

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The effects of dispersing Pt particles in bulk Pr1.90Ni0.71Cu0.21Ga0.05O4+δ (PNCG) on the electrical conductivity and oxygen permeability of the material were studied. The different thermal expansion coefficients of PNCG and Pt generated a mechanical compressive strain in the PNCG. This may cause the electrical conductivity to decrease in samples containing Pt. In contrast, the oxide ion conductivity estimated from the oxygen permeability increased upon dispersion of Pt. These variations appear to be related to the electron hole and interstitial oxygen concentrations. Moreover, the present study suggests that the mechanical strain induces a chemical strain via the introduction of oxygen defects as well as changes in cation valences.

Original languageEnglish
Pages (from-to)11125-11131
Number of pages7
JournalPhysical Chemistry Chemical Physics
Volume18
Issue number16
DOIs
Publication statusPublished - 2016

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Ionic conductivity
Oxides
ion currents
Oxygen
oxides
oxygen
electronics
permeability
electrical resistivity
dispersing
Thermal expansion
Cations
thermal expansion
interstitials
Ions
valence
cations
conductivity
Defects
Electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4 . / Ishihara, Tatsumi; Hyodo, J.; Schraknepper, H.; Tominaga, K.; Ida, S.

In: Physical Chemistry Chemical Physics, Vol. 18, No. 16, 2016, p. 11125-11131.

Research output: Contribution to journalArticle

Ishihara, Tatsumi ; Hyodo, J. ; Schraknepper, H. ; Tominaga, K. ; Ida, S. / Effects of Pt dispersion on electronic and oxide ionic conductivity in Pr1.90Ni0.71Cu0.24Ga0.05O4 In: Physical Chemistry Chemical Physics. 2016 ; Vol. 18, No. 16. pp. 11125-11131.
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