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Maksimova L. A., Tret'yachenko E. V., Gorokhovskii A. V., Vikulova M. A., Bainyashev A. M., Goffman V. G. Electrophysical properties of ceramic materials based on manganese-containing potassium polytitanates. Electrochemical Energetics, 2022, vol. 22, iss. 4, pp. 170-180. DOI: 10.18500/1608-4039-2022-22-4-170-180, EDN: ABHMME

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Electrophysical properties of ceramic materials based on manganese-containing potassium polytitanates

Maksimova Liliia Alekseevna, The Saratov State Technical University of Gagarin Yu. A.
Tret'yachenko Elena Vasil'evna, The Saratov State Technical University of Gagarin Yu. A.
Gorokhovskii Aleksandr Vladilenovich, The Saratov State Technical University of Gagarin Yu. A.
Vikulova Mariya Aleksandrovna, The Saratov State Technical University of Gagarin Yu. A.
Bainyashev Aleksei Mikhailovich, The Saratov State Technical University of Gagarin Yu. A.
Goffman Vladimir Georgievich, The Saratov State Technical University of Gagarin Yu. A.

The new materials obtained in the potassium polytitanate (PPT)–MnSO4 system by modifying PPT in aqueous solutions of manganese sulfate of various concentrations, followed by thermal treatment and annealing at 1080°C, were synthesized and studied. The phase composition of the obtained materials was determined. Their electrochemical and electrophysical properties in the temperature range from 250 to 700°C were studied. The maximum volumetric and intergranular conductivities of the obtained materials were observed at 250°C (9 ⋅ 10−4 and 6 ⋅ 10−4 S/cm, respectively) in the samples containing 25 wt.% MnO. The value of the activation energy of the conductivity in the volume of grains and grain boundaries was 0.37 and 0.45 eV, respectively. It was shown that the permittivity at the frequency of 1 kHz varies from 103 to 5 ⋅ 105 depending on the temperature and manganese oxide content.

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