High-Temperature Proton-Conducting LaNbO4-Based Materials: Powder Synthesis by Spray Pyrolysis
Abstract:Submicrometer lanthanum ortho-niobate (LaNbO4 (LN))-based powders have been prepared by spray pyrolysis of an aqueous solution containing stable La–EDTA and Nb–malic acid complexes. The powders had a particle size of ∼0.1 m, a narrow particle size distribution, and high purity after calcination above 800°C. The powders possessed excellent sintering properties resulting in >98% dense materials at 1200°C. The present route is shown to be excellent for the large-scale preparation of high-quality LaNbO4-based powders.
Document Type: Research Article
Affiliations: Department of Materials Science and Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway
Publication date: 2007-11-01