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Progress in Plasma Processing of Materials, 2003

ISBN:
978-1-56700-192-1 (Print)
978-1-56700-447-2 (Online)

PLASMA SPRAYING OF A PEROVSKITE SUSPENSION FOR SOFC CATHODES

C. Monterrubio Badillo
Laboratoire SPCTS-UMR 6638, Universite de Limoges, Faculte des Sciences et Techniques, 123 avenue Albert Thomas, 87060 Limoges Cedex, France.

Helene Ageorges
University of Angers, LETP, 2 Boulevard Lavoisier, 49045 Angers Cedex, France

T. Chartier
Laboratoire SPCTS-UMR 6638, Universite de Limoges, Faculte des Sciences et Techniques, 123 avenue Albert Thomas, 87060 Limoges Cedex, France.

J. F. Coudert
Laboratoire Sciences des Procédés Céramiques et Traitements de Surface, UMR-CNRS 6638, Université de Limoges, 87060 Limoges Cedex, France

Pierre Fauchais
Laboratoire Sciences des Procedes Ceramiques et de Traitements de Surface UMR CNRS 6638 University of Limoges 123 avenue Albert Thomas, 87060 LIMOGES - France

Abstract

LaMnO3 coatings have been obtained by spraying a perovskite suspension injected in a d.c. plasma jet working with an arc current of 300 A and three different plasma forming gases: Ar (45,8slm), Ar/H2 (45/15slm) and Ar/H2/He (45/10/40slm). A perovskite stable suspension was prepared with ethanol as the liquid phase and submicronic particles of perovskites. These particles have been prepared through a solid state reaction at 1100 °C during 6 h. Before the suspension preparation, particles were milled during 5 h in a ball mill. The best results for coatings with perovskite were obtained with Ar, the other plasma forming gases resulting in perovskite decomposition.