Electrical conduction behavior of layered perovskite La 1-xBa1+xGaO4-δ

Kyu Hyoung Lee, Jong Hwa Kim, Hye Lim Kim, Shin Kim, Hong Lim Lee

Research output: Contribution to journalArticle

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Abstract

Layered perovskite oxides of the system La1-xBa 1+xGaO4-δ were synthesized and their electrical conduction behavior was studied. The oxides of the composition range 0 ≤ x ≤ 0.2 were analyzed as a single orthorhombic phase with a K 2NiF4-type structure. In the presence of water vapor, proton conduction was observed due to the incorporation of water into the oxygen vacancies for these oxides. Below 350°C, La0.8Ba 1.2GaO3.9 was considered to be a pure proton conductor and the activation energy for proton conduction was measured as 0.77 eV. In a dry atmosphere, it exhibited mixed conduction consisting of oxygen ions and holes at a high oxygen partial pressure, p(O2), and showed only oxygen-ion conduction at an intermediate and low p(O2).

Original languageEnglish
Pages (from-to)254-257
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume44
Issue number1 A
DOIs
Publication statusPublished - 2005 Jan 1

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Perovskite
Protons
conduction
Oxides
Oxygen
oxygen ions
Ions
Oxygen vacancies
protons
oxides
Partial pressure
Water vapor
Activation energy
oxygen
partial pressure
water vapor
Chemical analysis
conductors
Water
activation energy

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

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abstract = "Layered perovskite oxides of the system La1-xBa 1+xGaO4-δ were synthesized and their electrical conduction behavior was studied. The oxides of the composition range 0 ≤ x ≤ 0.2 were analyzed as a single orthorhombic phase with a K 2NiF4-type structure. In the presence of water vapor, proton conduction was observed due to the incorporation of water into the oxygen vacancies for these oxides. Below 350°C, La0.8Ba 1.2GaO3.9 was considered to be a pure proton conductor and the activation energy for proton conduction was measured as 0.77 eV. In a dry atmosphere, it exhibited mixed conduction consisting of oxygen ions and holes at a high oxygen partial pressure, p(O2), and showed only oxygen-ion conduction at an intermediate and low p(O2).",
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Electrical conduction behavior of layered perovskite La 1-xBa1+xGaO4-δ . / Lee, Kyu Hyoung; Kim, Jong Hwa; Kim, Hye Lim; Kim, Shin; Lee, Hong Lim.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 44, No. 1 A, 01.01.2005, p. 254-257.

Research output: Contribution to journalArticle

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AB - Layered perovskite oxides of the system La1-xBa 1+xGaO4-δ were synthesized and their electrical conduction behavior was studied. The oxides of the composition range 0 ≤ x ≤ 0.2 were analyzed as a single orthorhombic phase with a K 2NiF4-type structure. In the presence of water vapor, proton conduction was observed due to the incorporation of water into the oxygen vacancies for these oxides. Below 350°C, La0.8Ba 1.2GaO3.9 was considered to be a pure proton conductor and the activation energy for proton conduction was measured as 0.77 eV. In a dry atmosphere, it exhibited mixed conduction consisting of oxygen ions and holes at a high oxygen partial pressure, p(O2), and showed only oxygen-ion conduction at an intermediate and low p(O2).

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