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Progress in Plasma Processing of Materials, 2003

ISBN Imprimir: 978-1-56700-192-1

ISBN On-line: 978-1-56700-447-2

PLASMA SPRAYING OF A PEROVSKITE SUSPENSION FOR SOFC CATHODES

Resumo

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.
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