Abstract
xPb(Sc1/2Nb1/2)O3–(1 − x)Pb(Hf1−yTiy)O3 piezoelectric ceramics were prepared by solid-state route, and the phase structures and piezoelectric properties of ceramics were systematically investigated. Results showed that the sample with the composition of x = 0.07 and y = 0.53 possessed higher phase coexistence between the rhombohedral and tetragonal, and exhibited the optimal properties among different constituent systems, i.e., TC = 355 °C, d33 = 400 pC/N, εr = 1390, and tan δ = 1.05%. Furthermore, the effects of temperature on d33, leakage current density, P-E loop, and unipolar strain were studied for xPb(Sc1/2Nb1/2)O3–(1 − x)Pb(Hf0.47Ti0.53)O3 samples. The sample with x = 0.07 revealed better temperature stability as well, the reason of which was analyzed in detail. The study indicates that the 0.07Pb(Sc1/2Nb1/2)O3–0.93Pb(Hf0.47Ti0.53)O3 piezoelectric ceramic has excellently comprehensive properties suitable for application in higher temperature condition.
Highlights
Piezoelectric materials are typical materials that enable to realize the invertible conversion between mechanical energy and electrical energy
A ceramic system with high Curie temperature and excellent piezoelectric performance must be selected to ensure that piezoelectric devices can work normally in a wide temperature range
The results show that PSN-PHT ceramics are beneficial to the development of high temperature piezoelectric devices
Summary
Piezoelectric materials are typical materials that enable to realize the invertible conversion between mechanical energy and electrical energy. A ceramic system with high Curie temperature and excellent piezoelectric performance must be selected to ensure that piezoelectric devices can work normally in a wide temperature range. The development of high Curie temperature piezoelectric ceramic materials with excellent performance has become an urgent task. It was found that the introduction of PHT into relaxor ferroelectrics could significantly improve piezoelectric and dielectric properties. It can be made to have better performance by compounding with other lead-based solid solutions, optimizing the preparation process, adjusting the composition to the morphotropic phase boundary (MPB), and further doping modification. The Pb(Sc1/2Nb1/2)O3-Pb(Hf0.47Ti0.53)O3 (PSN-PHT) ceramics were prepared by conventional solid phase route. The phase structure and piezoelectric, ferroelectric, and dielectric properties of PSNPHT ceramics were investigated in detail.
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