Oxygen permeability of strontium-doped LaCoO3-δ perovskites

R.H.E. van Doorn*, H. Kruidhof, H.J.M. Bouwmeester, A.J. Burggraaf

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

19 Citations (Scopus)

Abstract

Oxygen permeation rates are reported for 2 mm thick La1-xSrxCoO3-δ (0≤x≤0.8) in the temperature range 700≤T≤1100 °C and oxygen partial pressure range 7.0×103 - 1.0×105 Pa. With the exception of x = 0.6 permeation rates increase with an increase in Sr doping level. The oxygen permeation can be described by Wagner theory. An anomaly is observed in the oxygen permeation between 750 - 775 °C, which is attributed to an order-disorder transition. It is further shown that the partial pressure at the low partial pressure side of the membrane has an important influence on the permeation rate. The (calculated) ionic conductivities and oxygen vacancy diffusion coefficients are among the highest reported in literature.

Original languageEnglish
Title of host publicationSymposium U – Solid State Ionics IV
EditorsG-A. Nazri, M. Schreiber, J-M. Tarascon
PublisherMaterials Research Society
Pages377-382
Number of pages6
DOIs
Publication statusPublished - 1995
EventMRS Fall Meeting 1994 - Boston, United States
Duration: 27 Nov 19942 Dec 1994

Publication series

NameMaterials Research Society Symposium - Proceedings
PublisherMaterials Research Society
Volume369
ISSN (Print)0272-9172

Conference

ConferenceMRS Fall Meeting 1994
CountryUnited States
CityBoston
Period27/11/942/12/94

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