期刊
SOLID STATE IONICS
卷 180, 期 11-13, 页码 805-811出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2009.01.010
关键词
Micro-tubular SOFC; Cathode-supported cell (CSC); Nickelate oxide; Colloidal stability; Cosintering
Fabrication conditions to obtain dense electrolyte double layers on a porous micro-tubular cathode substrate were investigated. Porous tubes of a nickelate material, Nd1.95NiO4 + delta, were fabricated by cold-isostatic pressing (CIP) and sintering. Thin films of electrolyte powders Ce0.9Gd0.1O1.95 (GDC) and Zr0.89Sc0.1Ce0.01O1.95 (SSZ) were applied by dip-coating in aqueous suspensions. Electrolyte powders had been attrition-milled to decrease their particle size and densification temperature. The quantity of polyacrylic acid (PAA) as dispersant was optimised by zeta-potential measurements. The densification behaviour was studied by dilatometry and SEM-imaging. A sintering temperature of 1250 degrees C was found to densify GDC whereas SSZ-layers remained slightly porous. (C) 2009 Elsevier B.V. All rights reserved.
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