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-?. , EDN: JVPANL
Electrophysical properties of non-stoichiometric lithium-iron magnesium-substituted spinels
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.
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