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Dielectric properties of BaTi4O9 single crystals

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Abstract

The barium tetratitanate (BaTi4O9) single crystals grown in a nitrogen gas by the floating zone method was characterized by dielectric property in the frequency range 1 kHz to 1 MHz. The as-grown crystals had an electric behaviour such as shown by a semiconductor. When the crystals were annealed at 1300° C for 5 h in air, the dielectric constant was independent of the frequencies and was anisotropic, and theQ-value became higher than that of the grown crystals. Further, from electron spin resonance measurements it was found that the as-grown crystals contained the Ti3+ ion. This seems to suggest that the electrical conductivity of the as-grown crystals is due to the Ti3+-Ti4+ hopping mechanism.

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Authors and Affiliations

  1. Institute of Inorganic Synthesis, Faculty of Engineering, Yamanashi University, Miyamae 7, 400, Kofu, Japan

    Isao Tanaka & Hironao Kojima

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  1. Isao Tanaka
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  2. Hironao Kojima
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Tanaka, I., Kojima, H. Dielectric properties of BaTi4O9 single crystals. J Mater Sci 24, 959–962 (1989). https://doi.org/10.1007/BF01148784

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  • DOI: https://doi.org/10.1007/BF01148784

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