MISC

2004年

Electrical properties of doped PrGaO3 perovskite-type oxides

Journal of the Ceramic Society of Japan
  • Guoxin Jiang
  • ,
  • Katsuhiro Nomura
  • ,
  • Hiroshi Miyoshi
  • ,
  • Masaru Yamashita
  • ,
  • Tomoko Akai

112
1307
開始ページ
380
終了ページ
383
記述言語
英語
掲載種別
DOI
10.2109/jcersj.112.380
出版者・発行元
Ceramic Society of Japan

Alkaline earth cation doped PrGaO3 dense ceramics, Pr 1-xMxGa1-yMgyO3-δ (M = Ca, Sr, and Ba), were synthesized by using a solid-state reaction method, and their total conductivity was measured under different kinds of atmospheres. The optimum dopant for the enhancement of conductivity was Sr for the Pr site, and Pr0.9Sr0.1Ga0.85Mg0.15O 3-δ (PSGM) showed higher electrical conductivity than other systems. From the total electrical conductivity values measured in Ar and O 2, it is strongly suggested that p-type electronic conduction is dominant in all of the doped PrGaO3 system. The difference between the conductivity in O2 and that in Ar was the largest in Pr 0.9Ca0.1Ga0.85Mg0.15O .-δ (PCGM) and the smallest in PSGM. To examine whether proton conduction occurs in Pr1-xCaxGa1-yMg yO3-δ system, the total electrical conductivity in Pr0.93Ca0.07Ga0.85Mg0.15O 3-δ was measured by changing the partial pressure of O 2 and H2O (or D2O) in the atmosphere. The results indicate that Pr0.93Ca0.07Ga0.85Mg 0.15O3-δ predominantly shows hole conduction below 873 K, and proton conductivity is negligibly small.

リンク情報
DOI
https://doi.org/10.2109/jcersj.112.380
ID情報
  • DOI : 10.2109/jcersj.112.380
  • ISSN : 0914-5400
  • SCOPUS ID : 4143150686

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