Abstract
In this paper the multicomponent PZT-type solid solution doped by barium, calcium, strontium, bismuth and germanium with composition: Pb0.975Ba0.01Ca0.01Sr0.005(Zr0.52Ti0.48)O3 + 1.4 wt.% Bi2O3 + 0.3 wt.% GeO obtained by hot uniaxial pressing method is described. The results of structural, dielectric, ferroelectric and electromechanical studies of these ceramics are presented. It has been stated that introduction to the basic composition PZT admixtures of the barium, calcium, strontium, bismuth and germanium has a positive effect on the electro-physic parameters of obtained ceramic samples. This material has good microstructure, with high value of the dielectric permittivity (with the high temperature of phase transition) as well as low dielectric losses. It allows considering this material as elements for low frequency and high temperature electromechanical transducers.
Highlights
Investigated material PZT-type with perovskite structure belongs to the family of multicomponent solid solutions with general formula (1–x)PbZrO3-xPbTiO3 [1,2,3,4]
At room temperature the PZT binary phase diagram can be roughly described in three areas
For PZT-type ceramics from morphotropic region the physical parameters of ceramics are usually extremely high or extremely low what is very important for applications [11]
Summary
Investigated material PZT-type with perovskite structure belongs to the family of multicomponent solid solutions with general formula (1–x)PbZrO3-xPbTiO3 [1,2,3,4]. The rhombohedral Zrrich region is separated from the tetragonal Ti-rich one by a morphotropic phase boundary (noted MPB) in which the two phases coexist [5,6] Wide isomorphism of this solid solution enables to substitute appropriate cations in the basic place of Pb, Zr and Ti [7]. An appropriate selection of the composition (from rhombohedral, tetragonal phases or morphotropy area), opportunely doping the basic composition and conditions of a technology ceramic powders and samples allows obtaining the materials, which can be used widely in different types of piezoelectric transducers, electronic sensors, actuators, resonators and filters for microelectronics and micromechatronics [8,9,10]. The main aim of this work was to obtain multicomponent Pb0.975Ba0.01Ca0.01Sr0.005(Zr0.52Ti0.48)O3+1.4 wt.% Bi2O3 + 0.3 wt.% GeO ceramics using hot uniaxial pressing method and research basic electrophysical properties
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