caa a22 4500 445362537 CHVBK 20180317142919.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10832-011-9664-5 doi (NATIONALLICENCE)springer-10.1007/s10832-011-9664-5 Structural and mechanical properties characterization of barium strontium titanate (BST) ceramics [Elektronische Daten] [M. Badr, L. El-Deen, A. Khafagy, D. Nassar] Ba(1-x)Sr(x)TiO3 ceramics, where x = 0.05, 0.10, 0.15, and 0.20, were prepared by solid state reaction technique. X-ray diffraction analysis confirmed the formation of single phase perovskite structures. Mechanical properties such as ultrasonic attenuation, longitudinal wave velocity, and longitudinal elastic modulus were studied by an ultrasonic pulse echo technique at 2MHz. Investigations of ceramic microstructures and mechanical properties showed its dependence on composition and sintering time. Increasing of Sr content, x, resulted in a decrease in bulk density and ultrasonic attenuation and an increase in velocity and modulus. Also, size of crystallites and c/a ratio were found to decrease with increasing of x, and increased with increasing of sintering time. High temperature ultrasonic studies showed, in addition to Curie phase transition, two relaxation peaks and its origin was investigated. The acquired structural and mechanical results were correlated and discussed. Springer Science+Business Media, LLC, 2011 BST ceramics nationallicence Phase transition nationallicence Ultrasonic attenuation nationallicence Longitudinal velocity nationallicence Longitudinal elastic modulus nationallicence XRD nationallicence Badr M. Faculty of Science, Physics Department, Minufiya University, 32511, Shebin El-Kom, Minufiya, Egypt aut El-Deen L. Faculty of Science, Physics Department, Minufiya University, 32511, Shebin El-Kom, Minufiya, Egypt aut Khafagy A. Faculty of Science, Physics Department, Minufiya University, 32511, Shebin El-Kom, Minufiya, Egypt aut Nassar D. Faculty of Science, Physics Department, Minufiya University, 32511, Shebin El-Kom, Minufiya, Egypt aut Journal of Electroceramics Springer US; http://www.springer-ny.com 27/3-4(2011-12-01), 189-196 1385-3449 27:3-4<189 2011 27 10832 https://doi.org/10.1007/s10832-011-9664-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10832-011-9664-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Badr M. Faculty of Science, Physics Department, Minufiya University, 32511, Shebin El-Kom, Minufiya, Egypt aut NATIONALLICENCE 700 1- El-Deen L. Faculty of Science, Physics Department, Minufiya University, 32511, Shebin El-Kom, Minufiya, Egypt aut NATIONALLICENCE 700 1- Khafagy A. Faculty of Science, Physics Department, Minufiya University, 32511, Shebin El-Kom, Minufiya, Egypt aut NATIONALLICENCE 700 1- Nassar D. Faculty of Science, Physics Department, Minufiya University, 32511, Shebin El-Kom, Minufiya, Egypt aut NATIONALLICENCE 773 0- Journal of Electroceramics Springer US; http://www.springer-ny.com 27/3-4(2011-12-01), 189-196 1385-3449 27:3-4<189 2011 27 10832 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer