Relaxor properties of Nb-modified (Ba0.8Sr0.2)TiO3 ceramics |
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| Authors: | L. Szymczak Z. Ujma M. Adamczyk A. Soszyński J. Koperski |
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| Affiliation: | 1. Institute of Physics, University of Silesia , ul, Uniwersytecka 4, 40-007 Katowice, Poland lidia.szymczak@us.edu.pl;3. Institute of Physics, University of Silesia , ul, Uniwersytecka 4, 40-007 Katowice, Poland |
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| Abstract: | Nb-doped (Ba0.8Sr0.2)TiO3 ceramics were prepared using conventional mixed-oxide processing technique. Permittivity and loss factor were investigated as a function of temperature for various frequencies of the measuring field. The obtained results confirmed the relaxor ferroelectric behaviour of the studied ceramics, i.e. a strong frequency dispersion of the permittivity maximum and a visible shift of its temperature with frequency. Analysis of real part of permittivity allowed us to determine the value of the freezing temperature characterising the relaxor ferroelectrics. The physical processes, responsible for the relaxor behaviour of the studied ceramics are discussed. |
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| Keywords: | barium strontium titanate dielectric properties ferroelectric relaxors |
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