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Frequency-dependent electrical properties in the system SnO2-TiO2 |
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| Authors: | Stanislaw Komornicki Marta Radecka Mieczyslaw Rekas |
| Affiliation: | (1) Faculty of Materials Science and Ceramic, University of Mining and Metallurgy, Al.Mickiewicza 30, 30-059 Krako´w, Poland;(2) School of Materials Science and Engineering, UNSW, University of New South Wales, Sydney, NSW, 2052, Australia |
| Abstract: | The a.c. impedance response of polycrystalline ceramics SnxTi-x1O2 was studied in the air in the temperature range 298–1073 K. The impedance spectra were analyzed in terms of two proposed equivalent circuits involving both resistor and non-Debye constant phase element (CPE). The presence of CPE elements may be interpreted by diffusion phenomena. The results indicate a negligible contribution of grain boundary resistance to the total resistivity of the studied materials. The determined activation energy of the bulk conductivity of TiO2 was compared with literature data. © 2001 Kluwer Academic Publishers |
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