Fabrication and dielectric properties of modified calcium (Pb0.75Ba0.25)(Zr0.7Ti0.3)O3 ceramics

Zbigniew Machnik, Dariusz Bochenek, Beata Wodecka-Dus (), Małgorzata Adamczyk and Katarzyna Osińska
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Zbigniew Machnik: University of Silesia, Institute of Technology and Mechatronics
Dariusz Bochenek: University of Silesia, Institute of Technology and Mechatronics
Beata Wodecka-Dus: University of Silesia, Institute of Technology and Mechatronics
Małgorzata Adamczyk: University of Silesia, Institute of Technology and Mechatronics
Katarzyna Osińska: University of Silesia, Institute of Technology and Mechatronics

The European Physical Journal B: Condensed Matter and Complex Systems, 2016, vol. 89, issue 2, 1-6

Abstract: Abstract The aim of the present work is to report investigations concerning the influence of homovalent modificators on relaxor properties of PBZT 25/70/30 ceramics. The selection of the proper homovalent additive was very important. Literature reports as well as data taken from the periodic table indicated, that calcium ions substitute themselves for lead ions with high likelihood of occurrence. The investigations showed that the substitution significantly changed the microstructure of ceramics – with grains of calcium modified ceramics decreasing and density increasing. The XRD measurements indicate that the pure PBZT ceramics as well as calcium dopant were characterised by tetragonal structure with space group I4 /mmm. Addition of calcium leads to a slight decrease in the lattice constant and crystal structure. The calcium modification also changes the dielectric properties. The temperature characteristic of the dielectric constant achieved a broadened maximum at temperature T m , which decreases with increasing Ca content. The properties typical for ferroelectric relaxors weaken with increasing calcium dopant.

Date: 2016
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DOI: 10.1140/epjb/e2015-60532-4

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