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A comparison of the transport properties of La2−xSrxNi1−yFeyO4+δ where 0<x<0.2 and 0<y<0.2

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Abstract

Recently there has been substantial interest in optimising perovskite type ceramics as mixed ionic-electronic conductors (MIECs) for use in ceramic oxygen generators and solid oxide fuel cells. However these materials suffer from thermomechanical deficiencies and therefore there is a need to develop alternative materials.

Using the IEDP/SIMS technique the La2−xSrxNi1−yFeyO4+δ series of compounds has been investigated and the oxygen tracer diffusion and surface exchange coefficients determined. It has been found that the oxide ion diffusivity of the x and y=0 material is very close to that of the fast oxide ion conducting perovskites such as La1−xSrxCoO3 (LSC) but on acceptor doping with Sr a considerable decrease in the oxygen tracer diffusion coefficient was observed. Further studies on the effects of B site doping, where y>0, indicate that this has very little effect on the transport properties.

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Authors and Affiliations

  1. Centre for Ion Conducting Membranes (CICM), Department of Materials, Imperial College of Science, Technology and Medicine, London, U.K.

    S. J. Skinner & J. A. Kilner

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  1. S. J. Skinner
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  2. J. A. Kilner
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Correspondence to S. J. Skinner.

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Skinner, S.J., Kilner, J.A. A comparison of the transport properties of La2−xSrxNi1−yFeyO4+δ where 0<x<0.2 and 0<y<0.2. Ionics 5, 171–174 (1999). https://doi.org/10.1007/BF02375836

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  • DOI: https://doi.org/10.1007/BF02375836

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