Defect chemistry of oxides in partially frozen-in states: Case studies for ZrO2(Y2O3), SrZrO3(Y2O3), and SrTiO3

Kazunari Sasaki, J. Claus, J. Maier

Research output: Contribution to journalConference article

27 Citations (Scopus)

Abstract

The low temperature defect chemistry is analyzed for ZrO2(Y2O3), SrZrO3(Y2O3), and SrTiO3. In this temperature regime, the oxygen incorporation is no longer in equilibrium but the internal ionization reaction of electrons (holes) with redox-active impurities is still reversible. The concentration of ions with a specific valence state is quantified by EPR for ZrO2(Y2O3), while the electrical conductivity is considered for SrZrO3(Y2O3) and SrTiO3. It is shown that the experimental low-temperature results can well be explained in this way. If the experiments are appropriately conducted, an additional degree of freedom is introduced, which is the freezing-in temperature. The technological and scientific relevance with respect to materials research is discussed.

Original languageEnglish
Pages (from-to)51-60
Number of pages10
JournalSolid State Ionics
Volume121
Issue number1
DOIs
Publication statusPublished - Jan 1 1999
EventProceedings of the 1997 11th International Conference on Solid State Ionics, SSI-97 - Honolulu, HI, USA
Duration: Nov 16 1997Nov 21 1997

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Oxides
chemistry
Defects
oxides
defects
freezing
degrees of freedom
valence
ionization
impurities
Temperature
electrical resistivity
temperature
oxygen
Freezing
Ionization
Paramagnetic resonance
ions
Impurities
Ions

All Science Journal Classification (ASJC) codes

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

Cite this

Defect chemistry of oxides in partially frozen-in states : Case studies for ZrO2(Y2O3), SrZrO3(Y2O3), and SrTiO3. / Sasaki, Kazunari; Claus, J.; Maier, J.

In: Solid State Ionics, Vol. 121, No. 1, 01.01.1999, p. 51-60.

Research output: Contribution to journalConference article

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abstract = "The low temperature defect chemistry is analyzed for ZrO2(Y2O3), SrZrO3(Y2O3), and SrTiO3. In this temperature regime, the oxygen incorporation is no longer in equilibrium but the internal ionization reaction of electrons (holes) with redox-active impurities is still reversible. The concentration of ions with a specific valence state is quantified by EPR for ZrO2(Y2O3), while the electrical conductivity is considered for SrZrO3(Y2O3) and SrTiO3. It is shown that the experimental low-temperature results can well be explained in this way. If the experiments are appropriately conducted, an additional degree of freedom is introduced, which is the freezing-in temperature. The technological and scientific relevance with respect to materials research is discussed.",
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N2 - The low temperature defect chemistry is analyzed for ZrO2(Y2O3), SrZrO3(Y2O3), and SrTiO3. In this temperature regime, the oxygen incorporation is no longer in equilibrium but the internal ionization reaction of electrons (holes) with redox-active impurities is still reversible. The concentration of ions with a specific valence state is quantified by EPR for ZrO2(Y2O3), while the electrical conductivity is considered for SrZrO3(Y2O3) and SrTiO3. It is shown that the experimental low-temperature results can well be explained in this way. If the experiments are appropriately conducted, an additional degree of freedom is introduced, which is the freezing-in temperature. The technological and scientific relevance with respect to materials research is discussed.

AB - The low temperature defect chemistry is analyzed for ZrO2(Y2O3), SrZrO3(Y2O3), and SrTiO3. In this temperature regime, the oxygen incorporation is no longer in equilibrium but the internal ionization reaction of electrons (holes) with redox-active impurities is still reversible. The concentration of ions with a specific valence state is quantified by EPR for ZrO2(Y2O3), while the electrical conductivity is considered for SrZrO3(Y2O3) and SrTiO3. It is shown that the experimental low-temperature results can well be explained in this way. If the experiments are appropriately conducted, an additional degree of freedom is introduced, which is the freezing-in temperature. The technological and scientific relevance with respect to materials research is discussed.

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