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On the origin of the semiconductivity of ceramic barium-bismuth titanate (IV) doped with iron

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Czechoslovak Journal of Physics B Aims and scope

Abstract

A considerable change in the electric conductivity of barium-bismuth titanate (IV) when doped with ferric oxide has been observed. In order to explain the origin of its semiconductive properties a substitution model is presented. This model assumes the entrance of Fe3+ ions into the crystalline lattice in three subsequent stages which mutually differ in the lattice position of the introduced Fe ion and in the compensation mechanism of the inequilibrium electric charge of the lattice ions. The validity of the proposed model is supported by the anomalous behaviour of the resistance, activation energy, type of conductivity, Curie temperature, internal stress and change in the size of crystals of the polycrystalline materials as a function of the amount iron they contain.

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Authors and Affiliations

  1. Research Institute of Electrotechnical Ceramics, Hradec Králové, Pospíšilova 281, Hradec Králové, Czechoslovakia

    J. Schwarzbach

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  1. J. Schwarzbach
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The author considers it his duty to thank his collaborators from the Research Institute of Electrotechnical Ceramics for effective help: Ing. VI. Koukal for the measurements of the semiconductive properties, Ing. L. Plocek for the roentgenographical analyses and Mr. V. Štefek for preparing the electron microscope pictures.

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Schwarzbach, J. On the origin of the semiconductivity of ceramic barium-bismuth titanate (IV) doped with iron. Czech J Phys 17, 906–916 (1967). https://doi.org/10.1007/BF01691642

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  • DOI: https://doi.org/10.1007/BF01691642

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