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Electrical properties of Nb2(1–y)Ta2yO5-based ceramics

Authors
  • Palatnikov, M. N.1
  • Efremov, V. V.1
  • Sidorov, N. V.1
  • 1 Russian Academy of Sciences, Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center, Akademgorodok 26a, Apatity, Murmansk oblast, 184200, Russia , Apatity, Murmansk oblast (Russia)
Type
Published Article
Journal
Inorganic Materials
Publisher
Pleiades Publishing
Publication Date
Jan 01, 2017
Volume
53
Issue
1
Pages
109–114
Identifiers
DOI: 10.1134/S0020168517010113
Source
Springer Nature
Keywords
License
Yellow

Abstract

We have studied the electrical properties of ceramic Nb2(1–y)Ta2yO5 samples, examined the dispersion of the real part of their dielectric permittivity ε′ at room temperature, and assessed their lattice dielectric permittivity ε′∞ The temperature dependences ε′(T) have been obtained at different frequencies, and the dielectric loss tan δ has been evaluated as a function of measuring electric field frequency and temperature. The direct-current conductivity (σdc) of the solid solutions has been determined at room temperature. Using impedance spectroscopy data, we have obtained temperature dependences of σdc for the Nb2(1–y)Ta2yO5 ceramics and evaluated the activation enthalpy for charge transport in these materials in different temperature ranges.

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