Ionic conductivity of perovskite LaCoO3 measured by oxygen permeation technique

C.H. Chen, H. Kruidhof, Henricus J.M. Bouwmeester, Anthonie Burggraaf, A.J. Burggraaf

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Abstract

Oxygen permeation measurement is demonstrated, not only for a mixed oxide ionic and electronic conductor, but also as a new alternative to determine ambipolar conductivities, which can be usually reduced to be partial conductivities (either ionic or electronic). As a model system and an end member of an important oxygen permeable La1-xSrxCoO3- dense membrane system, LaCoO3 dense ceramic was measured with respect to the thickness, temperature and oxygen partial pressure dependencies of its oxygen permeability. Within the thickness range used (down to 0.041cm), the oxygen permeation of LaCoO3 was found to be purely controlled by bulk diffusion with activation energies between 260–300kJmol-1. Its ionic conductivity and oxygen self-diffusion coefficient as functions of oxygen partial pressure were also derived from permeability data. PO2-0.46 and PO2-0.31 relations were found in the high pressure (1.01–10-2bar) and low pressure (10-2.8–10-3.4bar) ranges, respectively.
Original languageUndefined
Pages (from-to)71-75
Number of pages5
JournalJournal of applied electrochemistry
Volume27
Issue number27 [1
DOIs
Publication statusPublished - 1997

Keywords

  • METIS-106498
  • IR-12109

Cite this

Chen, C.H. ; Kruidhof, H. ; Bouwmeester, Henricus J.M. ; Burggraaf, Anthonie ; Burggraaf, A.J. / Ionic conductivity of perovskite LaCoO3 measured by oxygen permeation technique. In: Journal of applied electrochemistry. 1997 ; Vol. 27, No. 27 [1. pp. 71-75.
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abstract = "Oxygen permeation measurement is demonstrated, not only for a mixed oxide ionic and electronic conductor, but also as a new alternative to determine ambipolar conductivities, which can be usually reduced to be partial conductivities (either ionic or electronic). As a model system and an end member of an important oxygen permeable La1-xSrxCoO3- dense membrane system, LaCoO3 dense ceramic was measured with respect to the thickness, temperature and oxygen partial pressure dependencies of its oxygen permeability. Within the thickness range used (down to 0.041cm), the oxygen permeation of LaCoO3 was found to be purely controlled by bulk diffusion with activation energies between 260–300kJmol-1. Its ionic conductivity and oxygen self-diffusion coefficient as functions of oxygen partial pressure were also derived from permeability data. PO2-0.46 and PO2-0.31 relations were found in the high pressure (1.01–10-2bar) and low pressure (10-2.8–10-3.4bar) ranges, respectively.",
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year = "1997",
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Ionic conductivity of perovskite LaCoO3 measured by oxygen permeation technique. / Chen, C.H.; Kruidhof, H.; Bouwmeester, Henricus J.M.; Burggraaf, Anthonie; Burggraaf, A.J.

In: Journal of applied electrochemistry, Vol. 27, No. 27 [1, 1997, p. 71-75.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Ionic conductivity of perovskite LaCoO3 measured by oxygen permeation technique

AU - Chen, C.H.

AU - Kruidhof, H.

AU - Bouwmeester, Henricus J.M.

AU - Burggraaf, Anthonie

AU - Burggraaf, A.J.

PY - 1997

Y1 - 1997

N2 - Oxygen permeation measurement is demonstrated, not only for a mixed oxide ionic and electronic conductor, but also as a new alternative to determine ambipolar conductivities, which can be usually reduced to be partial conductivities (either ionic or electronic). As a model system and an end member of an important oxygen permeable La1-xSrxCoO3- dense membrane system, LaCoO3 dense ceramic was measured with respect to the thickness, temperature and oxygen partial pressure dependencies of its oxygen permeability. Within the thickness range used (down to 0.041cm), the oxygen permeation of LaCoO3 was found to be purely controlled by bulk diffusion with activation energies between 260–300kJmol-1. Its ionic conductivity and oxygen self-diffusion coefficient as functions of oxygen partial pressure were also derived from permeability data. PO2-0.46 and PO2-0.31 relations were found in the high pressure (1.01–10-2bar) and low pressure (10-2.8–10-3.4bar) ranges, respectively.

AB - Oxygen permeation measurement is demonstrated, not only for a mixed oxide ionic and electronic conductor, but also as a new alternative to determine ambipolar conductivities, which can be usually reduced to be partial conductivities (either ionic or electronic). As a model system and an end member of an important oxygen permeable La1-xSrxCoO3- dense membrane system, LaCoO3 dense ceramic was measured with respect to the thickness, temperature and oxygen partial pressure dependencies of its oxygen permeability. Within the thickness range used (down to 0.041cm), the oxygen permeation of LaCoO3 was found to be purely controlled by bulk diffusion with activation energies between 260–300kJmol-1. Its ionic conductivity and oxygen self-diffusion coefficient as functions of oxygen partial pressure were also derived from permeability data. PO2-0.46 and PO2-0.31 relations were found in the high pressure (1.01–10-2bar) and low pressure (10-2.8–10-3.4bar) ranges, respectively.

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KW - IR-12109

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M3 - Article

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SP - 71

EP - 75

JO - Journal of applied electrochemistry

JF - Journal of applied electrochemistry

SN - 0021-891X

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