Titre du document / Document title

Correlation of thermal properties and electrical conductivity of La_0.7Sr_0.3Cu_0.2Fe_0.8O_3-δ material for solid oxide fuel cells

Auteur(s) / Author(s)

WACKERL Jürgen ; KOPPITZ Thomas ; PECK Dong-Hyun ; WOO Sang-Kuk ; MARKUS Torsten ;

Résumé / Abstract

A copper-doped ferrite with the chemical composition La_0.7Sr_0.3Cu_0.2Fe_0.s0_3-δ (LaSrCuFe) was prepared using the classical ceramics method starting from the oxides. The linear thermal expansion coefficient in air was measured in the temperature range between 550 and 1,250 K to be between 10 × 10^―6 and 15 × 10^―6 K^―1. The electrical conductivity in air was found to be higher than 100 S cm^―1 for temperatures lower than 1,100 K. A change of oxygen stoichiometry was found above 650 K in an atmosphere of 20 vol% oxygen with argon. This change can be correlated with the electrical conductivity.

Revue / Journal Title

Journal of applied electrochemistry    ISSN  0021-891X   CODEN JAELBJ 

Source / Source

2009, vol. 39, n^o8, pp. 1243-1249 [7 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Springer, Dordrecht, PAYS-BAS  (1971) (Revue)

Mots-clés d'auteur / Author Keywords

Cathode

;

Oxygen stoichiometry

;

Mixed conductor

;

SOFT

;

Perovskite

;

Localisation / Location

INIST-CNRS, Cote INIST : 15602, 35400018724683.0120