Oxygen semi-permeability of erbia-stabilized bismuth oxide

H.J.M. Bouwmeester; H. Kruidhof; A.J. Burggraaf; P.J. Gellings

doi:10.1016/0167-2738(92)90416-M

Oxygen semi-permeability of erbia-stabilized bismuth oxide

H.J.M. Bouwmeester, H. Kruidhof, A.J. Burggraaf, P.J. Gellings

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Abstract

The isothermal permeability of oxygen through sintered dense disks of bismuth oxide stabilized with 25 mol% erbia (BE25) has been studied at 610–810°C and oxygen pressures of 0.0001–1 atm. It is concluded that the permeating flux is rate limited both by solid state diffusion of electron holes and by the surface exchange reaction. From the results the p-type electronic conductivity of BE25 and the surface oxygen exchange rate have been evaluated. The value obtained for the latter shows excellent agreement with that obtained from ¹⁸O-¹⁶O isotope exchange reported previously. Using gold point electrodes it is demonstrated that the oxygen semipermeability flux in case of partial rate control by surface oxygen exchange leads to deviations from Nernst behaviour, though oxygen permeation measurements reveal that under the applied conditions BE25 remains a solid electrolyte with an ionic transference number close to unity.

Original language	English
Pages (from-to)	460-468
Number of pages	8
Journal	Solid state ionics
Volume	53-56
Issue number	Part 1
DOIs	https://doi.org/10.1016/0167-2738(92)90416-M
Publication status	Published - 1992

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title = "Oxygen semi-permeability of erbia-stabilized bismuth oxide",

abstract = "The isothermal permeability of oxygen through sintered dense disks of bismuth oxide stabilized with 25 mol% erbia (BE25) has been studied at 610–810°C and oxygen pressures of 0.0001–1 atm. It is concluded that the permeating flux is rate limited both by solid state diffusion of electron holes and by the surface exchange reaction. From the results the p-type electronic conductivity of BE25 and the surface oxygen exchange rate have been evaluated. The value obtained for the latter shows excellent agreement with that obtained from 18O-16O isotope exchange reported previously. Using gold point electrodes it is demonstrated that the oxygen semipermeability flux in case of partial rate control by surface oxygen exchange leads to deviations from Nernst behaviour, though oxygen permeation measurements reveal that under the applied conditions BE25 remains a solid electrolyte with an ionic transference number close to unity.",

author = "H.J.M. Bouwmeester and H. Kruidhof and A.J. Burggraaf and P.J. Gellings",

year = "1992",

doi = "10.1016/0167-2738(92)90416-M",

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TY - JOUR

T1 - Oxygen semi-permeability of erbia-stabilized bismuth oxide

AU - Bouwmeester, H.J.M.

AU - Kruidhof, H.

AU - Burggraaf, A.J.

AU - Gellings, P.J.

PY - 1992

Y1 - 1992

N2 - The isothermal permeability of oxygen through sintered dense disks of bismuth oxide stabilized with 25 mol% erbia (BE25) has been studied at 610–810°C and oxygen pressures of 0.0001–1 atm. It is concluded that the permeating flux is rate limited both by solid state diffusion of electron holes and by the surface exchange reaction. From the results the p-type electronic conductivity of BE25 and the surface oxygen exchange rate have been evaluated. The value obtained for the latter shows excellent agreement with that obtained from 18O-16O isotope exchange reported previously. Using gold point electrodes it is demonstrated that the oxygen semipermeability flux in case of partial rate control by surface oxygen exchange leads to deviations from Nernst behaviour, though oxygen permeation measurements reveal that under the applied conditions BE25 remains a solid electrolyte with an ionic transference number close to unity.

AB - The isothermal permeability of oxygen through sintered dense disks of bismuth oxide stabilized with 25 mol% erbia (BE25) has been studied at 610–810°C and oxygen pressures of 0.0001–1 atm. It is concluded that the permeating flux is rate limited both by solid state diffusion of electron holes and by the surface exchange reaction. From the results the p-type electronic conductivity of BE25 and the surface oxygen exchange rate have been evaluated. The value obtained for the latter shows excellent agreement with that obtained from 18O-16O isotope exchange reported previously. Using gold point electrodes it is demonstrated that the oxygen semipermeability flux in case of partial rate control by surface oxygen exchange leads to deviations from Nernst behaviour, though oxygen permeation measurements reveal that under the applied conditions BE25 remains a solid electrolyte with an ionic transference number close to unity.

U2 - 10.1016/0167-2738(92)90416-M

DO - 10.1016/0167-2738(92)90416-M

M3 - Article

SN - 0167-2738

VL - 53-56

SP - 460

EP - 468

JO - Solid state ionics

JF - Solid state ionics

IS - Part 1

ER -

Oxygen semi-permeability of erbia-stabilized bismuth oxide

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