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High-Temperature Proton-Conducting LaNbO4-Based Materials: Powder Synthesis by Spray Pyrolysis

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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.
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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

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