Journal of Physical Studies 11(4), 408–414 (2007)
DOI: https://doi.org/10.30970/jps.11.408

HIGH TEMPERATURE ANOMALY OF ELECTRICAL CONDUCTION IN In₂O₃–SrO CERAMICS

А. Bondarchuk^{1}, А. Glot^{2}, G. Behr^{3}, J. Werner^{3}
^{1}Dnipropetrovsk National University,
Dnipropetrovsk, 13 Naukovyi St., 49050, Ukraine,
E-mail: alexbondua@yahoo.com
^{2}Technological University of Mixteca,
Huajuapan, Oaxaca, C.P.69000, Mexico
^{3}Leibniz-Institute of solid state and materials science,
Dresden, Germany, Postbox D–01171

The anomalous decrease of electrical conductance in In$_{2}$O$_{3}$-SrO ceramics with the temperature in the range of 560-670 K in the air is studied. This material exhibits a voltage-current dependence with the current limiting region. Based on the experimental data (thermographic analysis, scanning electron microscopy, XPS and temperature dependence of electrical conductance in air, argon and in gas mixture of Ar and O$_{2})$ a mechanism of the observed effect is discussed. It can be related to a conversion of chemisorbed particles to some forms with a more negative charge and to oxygen diffusion into the bulk of grains.

PACS number(s): 72.20.-i, 73.30.+y, 73.40.Cg, 73.20.-r, 78.30.Ly

HIGH TEMPERATURE ANOMALY OF ELECTRICAL CONDUCTION IN In2O3–SrO CERAMICS

HIGH TEMPERATURE ANOMALY OF ELECTRICAL CONDUCTION IN In₂O₃–SrO CERAMICS