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http://dx.doi.org/10.4191/KCERS.2010.47.1.071

Grain Boundary Protonic Conductivity in Highly Dense Nano-crystalline Y-doped BaZrO3  

Park, Hee-Jung (Department of Chemical Engineering and Materials Science, University of California)
Munir, Zuhair A. (Department of Chemical Engineering and Materials Science, University of California)
Kim, Sang-Tae (Department of Chemical Engineering and Materials Science, University of California)
Publication Information
Journal of the Korean Ceramic Society / v.47, no.1, 2010 , pp. 71-74 More about this Journal
Abstract
We have investigated protonic conduction in highly dense (>98%) polycrystalline Y-doepd $BaZrO_3$ (BYZ) ceramic with an average grain size of ~85 nm. It is observed that the protonic conductivity across the grain boundaries in this nano-crystallilne BYZ (n-BYZ) is significantly higher than the microcrystalline counterpart. Such a remarkable enhancement in grain boundary conductivity results in high overall conductivity that may allow this chemically stable protonic conductor to serve as a solid electrolyte for low-temperature solid oxide fuel cell applications.
Keywords
Proton conductors; $BaZrO_3$; Nanocrystallline ceramics; Grain boundary conductivity; Spark plasma sintering;
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