ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)

For citation:

Gasyuk I. M., Kaikan L. S., Ugorchuk V. V., Grabko T. V. Electrophysical properties of non-stoichiometric lithium-iron magnesium-substituted spinels. Electrochemical Energetics, 2008, vol. 8, iss. 1, pp. 58-63. DOI: 10.18500/1608-4039-2008-8-1-58-63, EDN: JVPANL

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Language: 
Russian
Heading: 
Lithium electrochemical systems
Article type: 
Article
DOI: 
10.18500/1608-4039-2008-8-1-58-63
EDN: 
JVPANL

Electrophysical properties of non-stoichiometric lithium-iron magnesium-substituted spinels

Autors: 
Gasyuk I. M., Carpathian National University of V. Stefanik
Kaikan L. S., Carpathian National University of V. Stefanik
Ugorchuk V. V., Carpathian National University of V. Stefanik
Grabko T. V., Carpathian National University of V. Stefanik
Abstract: 

Samples having the chemical formula Li0.5 Fe2.5 – x MgxO4 (0 ? x ? 1) were prepared by the standard ceramic method. The parts of the dielectric constant ?', ?'' and A.C. conductivity ?(?) are measured at different frequencies from 10 – 2 to 105 Hz in the room temperature and different cooling velocity, and then the dielectric loss tangent tg ? was calculated. The sample with x = 0.1 what was cooled quickly showed the greatest values of ?0 as compared with the other samples. The effect of Mg2 + concentration on the dielectric parameters is discussed according to the Koops model.

Key words: 
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Reference: 

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Received: 
28.02.2008
Accepted: 
28.02.2008
Published: 
31.03.2008