Ionic conductivity of perovskite LaCoO3 measured by oxygen permeation technique


Chen, C.H. and Kruidhof, H. and Bouwmeester, H.J.M. and Burggraaf, A.J. (1997) Ionic conductivity of perovskite LaCoO3 measured by oxygen permeation technique. Journal of applied electrochemistry, 27 (1). pp. 71-75. ISSN 0021-891X

open access
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.
Item Type:Article
Copyright:© 1997 Springer
Science and Technology (TNW)
Research Group:
Link to this item:
Official URL:
Export this item as:BibTeX
HTML Citation
Reference Manager


Repository Staff Only: item control page

Metis ID: 106498