Abstract
Barium cerate (BaCeO 3) has high proton conductivity but rather poor chemical stability in CO 2-containing atmospheres. Barium zirconate (BaZrO 3), in contrast, is a rather stable material, but exhibits poor sinterability. In the present work, powders of Y-doped BaCeO 3 and BaZrO 3 were synthesized via the solid solution reaction method, and dense ceramic membranes with BaCe 0.9Y 0.1O 3 and BaZr 0.85Y 0.15O 3 were prepared by the aerosol deposition method at room temperature. Aerosol deposition method is a technique that enables the fabrication of ceramic films at room temperature with a high deposition rate as well as strong adhesion to the substrate. The powders and aerosol-deposited membranes were characterized by X-ray diffraction, particle size analysis, scanning electron microscopy, and X-ray elemental mapping. The chemical stability of powders and aerosol-deposited membranes with BaCe 0.9Y 0.1O 3 and BaZr 0.85Y 0.15O 3 against water and carbon dioxide has been investigated, and it was found that BaZr 0.85Y 0.15O 3 materials showed a better chemical compatibility.
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