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Protonic Conduction of BaCe0.85YO. 1503 Doped with SrTiO3Reformers based on ceramic membrane technology potentially offer hydrogen production that is comparable to the cost of fossil fuels. Protonic conducting ceramic with the chemical formula AB03 offers the promise of highly selective hydrogen separation at intermediate temperature (400-800 C). Among different perovskite-type oxides, BaCe03 and SrCe03 based compositions show high protonic conductivities but strong resistance to densification. X-ray diffraction studies on sintered specimens of BaCe0.85Y0.1503-6 show multi-phase formation which was found to show dependence upon powder synthesis method. Doping with SrTiO3 suppresses multi-phase formation and enhances grain growth. Conductivity measurements in temperature range of 200 to 1000 C were performed by ac impedance spectroscopy under dry and wet conditions. Sintering behavior, phase formation and conductivity results will be reported.
Document ID
20050212163
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Dynys, Frederick W.
(NASA Glenn Research Center Cleveland, OH, United States)
Sayir, Ali
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Subject Category
Nonmetallic Materials
Meeting Information
Meeting: ACS 28th International Cocoa Beach Conference
Location: Cocoa Beach, FL
Country: United States
Start Date: January 23, 2005
End Date: January 28, 2005
Sponsors: American Ceramic Society
Funding Number(s)
CONTRACT_GRANT: 22-CTRGA
CONTRACT_GRANT: IRD04-12
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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