Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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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)
  • Published : 2010.01.31
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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.

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