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Structure and dielectric properties of PZT-type ceramics with the diffuse phase transition |
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| Authors: | L. Kozielski M. Adamczyk A. Lisinska-Czekaj T. Orkisz M. Piechowiak D. Czekaj |
| Affiliation: | 1. Department of Materials Science , University of Silesia , 2, Sniezna St., Sosnowiec, 41-200 Poland kozielsk@us.edu.pl;3. Institute of Physics , University of Silesia , 4, Uniwersytecka St., Katowice, 40-007 Poland;4. Department of Materials Science , University of Silesia , 2, Sniezna St., Sosnowiec, 41-200 Poland |
| Abstract: | In the present work the (Pb0.84Ba0.16)(Zr0.54Ti0.46)O3 (PBZT) solid solution has been synthesized. The process of preparation was investigated by simultaneous thermal analysis (STA) and X-ray diffraction method. The hot pressing method was utilized for densification of ceramic samples. Dielectric properties of donor- and acceptor-doped PZT-type ceramics were measured within the temperature range including the phase transition region. Frequency-dependent relaxation behaviour in PBZT ceramics was found. The structural phase transition at T?=?(517?±?3)?K was determined by X-ray diffraction method. Arrhenius plot of total conductivity derived from ac impedance spectroscopy measurements was used for characterisation of phase transition. Changes in activation energy were found characteristic of phase transition in PBZT ceramics. |
| Keywords: | Ferroelectric ceramics Phase transition Dielectric Ac impedance spectroscopy |