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Perovskites as Oxide-Ion Electrolytes

Published online by Cambridge University Press:  16 February 2011

Man Feng
Affiliation:
Department of Physics, RLM 5.208, the University of Texas at Austin, Austin, TX 78712
John B. Goodenough
Affiliation:
Center for Material Science and Engineering, ETC 9.102, the University of Texas at Austin, Austin, TX 78712
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Abstract

Substitution of Nb, Ti, or Sn for In and of La for Ba was used to obtain cubic, anion-deficient perovskites AB03-δ. Neither the ferroelectric character of Nb5+ and Ti4+, nor the more acidic character of Sn4+ suppressed water absorption into the anion vacancies at temperatures T < 500ºC. However, the smaller La3+ ion in Bal-xLaxO2.5+0.5x did suppress the absorption of water for x = 0.4, and Ba0.6La0.4InO2.7 is competitive with yttria-stabilized zirconia as an oxide-ion electrolyte.

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Type
Research Article
Copyright
Copyright © Materials Research Society 1995

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