HYDROACOUSTICS
ANNUAL JOURNAL |
START | NEW VOL 20 | SEARCH | STATISTICS | PAS - GDANSK DIVISION |
pp. 69-78, vol. 7, 2004 Jan Ilczuk University of Silesia, Faculty of Computer and Material Sciences, Department of Material Science, Sosnowiec, Poland Justyna Bluszcz University of Silesia, Faculty of Computer and Material Sciences, Department of Material Science, Sosnowiec, Poland Radosław Zachariasz University of Silesia, Faculty of Computer and Material Sciences, Department of Material Science, Sosnowiec, Poland Key words: Abstract: The (Pb0.9Ba0.1)(Zr0.53Ti0.47)O3 + 2% mol. Nb2O5 ceramics were prepared from high purity synthesized ceramic powders by a classical sintering method. Internal friction Ǫ-1 and Young’s modulus E were measured as a function of temperature for the sample in the initial state and after γ irradiation 5 R dose. Two internal friction peaks P1 and P2, related to oxygen vacancies and domain walls, respectively, were observed in all measurements. In addition, a minimum in modulus E associated with a phase transition internal friction peak P3 appearing at curie temperature was observed. The internal friction results indicate the changes of concentration of oxygen vacancies and the domain structure, which will be helpful in the utilities of the PZT ceramics in transducers, ultrasonic generators, wave filters, etc.
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