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Modified Ion-Conducting Ceramics Based on Lanthanum Gallate: Synthesis, Structure, and Properties

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Abstract

A review is presented of the synthesis and complex investigation of modified ion-conducting ceramics based on heterosubstituted lanthanum gallate as a promising electrolyte material for solid oxide fuel cells. The effect the composition of multicomponent complex oxides has on the structure, microstructure, and electrophysical properties of ceramics is examined. Samples of ceramics with new compositions are produced via solid-state synthesis and modified with lithium fluoride. A drop is observed in the sintering temperature of the ceramics, caused by the liquid phase mechanism of sintering as a result of the low-melting superstoichiometric quantities of the additive. The effect lithium fluoride has on the process of phase formation, microstructure, and conductivity of the ceramics is investigated. It is found that samples modified with lithium fluoride display high density, dense grain packing, and high values of electrical conductivity at high temperatures.

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Authors and Affiliations

  1. Karpov Institute of Physical Chemistry, Moscow, 105064, Russia

    G. M. Kaleva, E. D. Politova, A. V. Mosunov & N. V. Sadovskaya

Authors
  1. G. M. Kaleva
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  2. E. D. Politova
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  3. A. V. Mosunov
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  4. N. V. Sadovskaya
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Corresponding author

Correspondence to G. M. Kaleva.

Additional information

Original Russian Text © G.M. Kaleva, E.D. Politova, A.V. Mosunov, N.V. Sadovskaya, 2018, published in Zhurnal Fizicheskoi Khimii, 2018, Vol. 92, No. 6, pp. 953–959.

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Kaleva, G.M., Politova, E.D., Mosunov, A.V. et al. Modified Ion-Conducting Ceramics Based on Lanthanum Gallate: Synthesis, Structure, and Properties. Russ. J. Phys. Chem. 92, 1138–1144 (2018). https://doi.org/10.1134/S0036024418060067

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  • DOI: https://doi.org/10.1134/S0036024418060067

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