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Specific Features of the Structure and the Dielectric Properties of Sodium–Bismuth Titanate-Based Ceramics

  • 14th International Conference on the Physics of Dielectrics, St. Petersburg, May 29–June 2, 2017. Dielectrics
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Abstract

The phase formation, specific features, and the dielectric properties of the ceramics of compositions from the region of morphotropic interface in the (Na0.5Bi0.5)TiO3–BaTiO3 system modified by Bi(Mg0.5Ti0.5)O3 and also low-melting additions KCl, NaCl–LiF, CuO, and MnO2 that favor the control of the stoichiometry and the properties of the ceramics have been studied. The ceramics are characterized by ferroelectric phase transitions that are observed as jumps at temperatures near 400 K and maxima at Tm ~ 600 K in the temperature dependences of the dielectric permittivity. The phase transitions at ~400 K demonstrate the relaxor behavior indicating the existence of polar domains in the nonpolar matrix. An increase in the content of Bi(Mg0.5Ti0.5)O3 favor a decrease in the electrical conductivity and dielectric losses of the samples, and the relative dielectric permittivity at room temperature εrt is retained quite high, achieving the highest values εrt = 1080–1350 in the ceramics modified with KCl.

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Authors and Affiliations

  1. Karpov Scientific Research Institute of Physics and Chemistry, ul. Vorontsovo Pole 10, building 3, Moscow, 105064, Russia

    E. D. Politova, N. V. Golubko, G. M. Kaleva, A. V. Mosunov, N. V. Sadovskaya & S. Yu. Stefanovich

  2. Moscow State University, Moscow, 119991, Russia

    D. A. Bel’kova & S. Yu. Stefanovich

Authors
  1. E. D. Politova
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  2. N. V. Golubko
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  3. G. M. Kaleva
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  4. A. V. Mosunov
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  5. N. V. Sadovskaya
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  6. D. A. Bel’kova
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  7. S. Yu. Stefanovich
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Correspondence to E. D. Politova.

Additional information

Original Russian Text © E.D. Politova, N.V. Golubko, G.M. Kaleva, A.V. Mosunov, N.V. Sadovskaya, D.A. Bel’kova, S.Yu. Stefanovich, 2018, published in Fizika Tverdogo Tela, 2018, Vol. 60, No. 3, pp. 426–430.

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Politova, E.D., Golubko, N.V., Kaleva, G.M. et al. Specific Features of the Structure and the Dielectric Properties of Sodium–Bismuth Titanate-Based Ceramics. Phys. Solid State 60, 428–432 (2018). https://doi.org/10.1134/S1063783418030265

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  • DOI: https://doi.org/10.1134/S1063783418030265

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