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Oxygen activity dependence of the defect structure of La-doped BaTiO3

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Abstract

A model for the behaviour of donor-doped BaTiO3 as a function of oxygen activity is proposed. Thermogravimetric measurements show good agreement with the proposed model. The results show that donor-doped BaTiO3 is stoichiometric with electronic compensation of the donor at low oxygen activity, but with increasing oxygen activity, compensation becomes ionic as excess oxygen is absorbed. The possible compensation mechanisms are discussed.

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Authors and Affiliations

  1. Department of Ceramic Engineering, University of Missouri-Rolla, 65401, Rolla, Missouri, USA

    M. M. Nasrallah, H. U. Anderson, A. K. Agarwal & B. F. Flandermeyer

Authors
  1. M. M. Nasrallah
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  2. H. U. Anderson
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  3. A. K. Agarwal
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  4. B. F. Flandermeyer
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On leave from the Faculty of Engineering, Cairo University, Egypt.

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Nasrallah, M.M., Anderson, H.U., Agarwal, A.K. et al. Oxygen activity dependence of the defect structure of La-doped BaTiO3 . J Mater Sci 19, 3159–3165 (1984). https://doi.org/10.1007/BF00549799

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  • DOI: https://doi.org/10.1007/BF00549799

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