Frequency-dependent electrical properties in the system SnO2-TiO2

Authors
Komornicki, S Radecka, M Rekas, M
Citation
S. Komornicki et al., Frequency-dependent electrical properties in the system SnO2-TiO2, J MAT S-M E, 12(1), 2001, pp. 11-16
Citations number
27
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN journal
09574522 → ACNP
Volume
12
Issue
1
Year of publication
2001
Pages
11 - 16
Database
ISI
SICI code
0957-4522(200101)12:1<11:FEPITS>2.0.ZU;2-U
Abstract
The a.c. impedance response of polycrystalline ceramics SnxTi1-xO2 was stud ied in the air in the temperature range 298-1073 K. The impedance spectra w ere analyzed in terms of two proposed equivalent circuits involving both re sistor and non-Debye constant phase element (CPE). The presence of CPE elem ents may be interpreted by diffusion phenomena. The results indicate a negl igible contribution of grain boundary resistance to the total resistivity o f the studied materials. The determined activation energy of the bulk condu ctivity of TiO2 was compared with literature data. (C) 2001 Kluwer Academic Publishers.