Transactions of the Materials Research Society of Japan
Online ISSN : 2188-1650
Print ISSN : 1382-3469
ISSN-L : 1382-3469
Regular Papers
Proton conduction of new brownmillerite type compounds Ba2(Zn2/3B'1/3)2O5 (B'= Nb and Ta) and Ba2(Zn3/4W1/4)2O5
Miwa SaitoToshio TakayamaHiroshi Yamamura
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2010 Volume 35 Issue 3 Pages 495-498

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Abstract
In order to obtain high ionic conducting materials based on perovskite structure for the electrolyte of Solid Oxide Fuel Cells (SOFCs), Ba2(Zn2/3B'1/3)2O5 (B'= Nb and Ta) and Ba2(Zn3/4W1/4)2O5 systems were synthesized by solid state reaction. Powder X-ray diffraction analysis revealed that the samples with B' = Nb and Ta in Ba2(Zn2/3B'1/3)2O5 had a cubic and a hexagonal perovskite-type structures, respectively, and that Ba2(Zn3/4W1/4)2O5 had a cubic NaCl structure. These materials exhibited the uptake of large amount of H2O and the appearance of high proton conductivity.
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© 2010 The Materials Research Society of Japan
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