Materials Transactions Online

Materials Transactions, Vol.59 No.01 (2018) pp.19-22
© 2017 The Japan Institute of Metals and Materials

Investigation of the Electrical Properties in Indium and Yttrium-Doped Barium Zirconate Based Proton Conducting Perovskites

Young-Sung Lee1, Yasuhiro Takamura2, Yi-Hsuan Lee1, Kwati Leonard1 and Hiroshige Matsumoto1, 3

1International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan
2Department of Hydrogen Energy Systems, Kyushu University, Fukuoka 819-0395, Japan
3Next-Generation Fuel Cell Research Center (Next-FC), Kyushu University, Fukuoka 819-0395, Japan

The influences of In- and Y-doping on the electrical conduction properties of barium zirconate were investigated. The electrical conductivity measured on of BaZr1−xyInxYyO3−δ (x = 0, 0.1, 0.2 and y = 0, 0.1, 0.2) could be understood that yttrium doping causes high bulk conductivity and indium doping leads to lowering activation energy of the grain boundary. Co-doping of yttrium and indium promotes the enhancement effect of improving the bulk conductivity and lowering of activation energy, and it is thus expected that the co-doping with yttrium and indium can work for controlling the bulk and grain boundary conduction specifically in the materials.


(Received 2017/06/09; Accepted 2017/06/28; Published 2017/12/25)

Keywords: proton conductor, electrical conductivity, perovskite, co-doping

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