A modified Pechini process has been used to synthesize perovskite-structured yttrium-doped barium zirconate of the form (BZY15). The X-ray diffraction pattern for the sintered material ( at ) confirms a cubic structure with unit cell parameter of . Scanning electron microscopy images reveal a dense electrolyte structure. Thermal analysis (TGA/DTA) was also conducted on the material to determine possible endothermic and exothermic peaks and phase transformations. Raman spectroscopy data indicated that the most intense band in the spectrum of BZY15 occurs at , which suggests that cubic zirconia vibrations are present. No bands were observed for secondary oxides, such as , which would have a characteristic sharp band at , or , whose characteristic band occurs at . AC-impedance measurements at indicate that the conductivity of the sample is higher in humidified gases compared to dry ones and has the lowest value in humidified air.
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February 2008
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Yttrium-Doped Barium Zirconates as Ceramic Conductors in the Intermediate Temperature Range
S. Higgins,
S. Higgins
Department of Materials Science and Engineering,
University of Connecticut
, 44 Weaver Road, Storrs, CT 06269
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N. M. Sammes,
N. M. Sammes
Department of Materials Science and Engineering,
University of Connecticut
, 44 Weaver Road, Storrs, CT 06269
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A. Smirnova,
A. Smirnova
Department of Materials Science and Engineering,
University of Connecticut
, 44 Weaver Road, Storrs, CT 06269
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J. A. Kilner,
J. A. Kilner
Department of Materials,
Imperial College London
, Prince Consort Road, London SW7 2BP, United Kingdom
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G. Tompsett
G. Tompsett
Department of Chemical Engineering,
University of Massachusetts
, 159 Goessmann Lab, Amhurst, MA 01003
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S. Higgins
Department of Materials Science and Engineering,
University of Connecticut
, 44 Weaver Road, Storrs, CT 06269
N. M. Sammes
Department of Materials Science and Engineering,
University of Connecticut
, 44 Weaver Road, Storrs, CT 06269
A. Smirnova
Department of Materials Science and Engineering,
University of Connecticut
, 44 Weaver Road, Storrs, CT 06269
J. A. Kilner
Department of Materials,
Imperial College London
, Prince Consort Road, London SW7 2BP, United Kingdom
G. Tompsett
Department of Chemical Engineering,
University of Massachusetts
, 159 Goessmann Lab, Amhurst, MA 01003J. Fuel Cell Sci. Technol. Feb 2008, 5(1): 011003 (4 pages)
Published Online: January 16, 2008
Article history
Received:
December 1, 2005
Revised:
April 27, 2007
Published:
January 16, 2008
Citation
Higgins, S., Sammes, N. M., Smirnova, A., Kilner, J. A., and Tompsett, G. (January 16, 2008). "Yttrium-Doped Barium Zirconates as Ceramic Conductors in the Intermediate Temperature Range." ASME. J. Fuel Cell Sci. Technol. February 2008; 5(1): 011003. https://doi.org/10.1115/1.2756570
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