Eur. Phys. J. Appl. Phys.
Volume 74, Number 3, June 2016
|Number of page(s)||8|
|Section||Semiconductors and Devices|
|Published online||03 June 2016|
Optimizing structure and electrical properties of high-Curie temperature PMN-PHT piezoelectric ceramics via tailoring sintering process
School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering, Changzhou University, Changzhou 213164, P.R. China
2 School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, P.R. China
3 Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences, Shanghai 201800, P.R. China
Revised: 17 April 2016
Accepted: 22 April 2016
Published online: 3 June 2016
Pseudo-ternary high-Curie temperature 0.15Pb(Mg1/3Nb2/3)O3-0.4PbHfO3-0.45PbTiO3 (PMN-PHT) piezoelectric ceramics were prepared by the conventional ceramic processing via the columbite precursor method. The influences of sintering temperature and sintering time on structure and electrical properties of the PMN-PHT ceramics were investigated in order to tailor their performance further. The sintered PMN-PHT ceramics exhibit pure perovskite structure with composition locating at the rhombohedral side around the morphotropic phase boundary (MPB) of the PMN-PHT system. The PMN-PHT ceramics sintered at 1260 °C for 2 h exhibit the best dielectric, ferroelectric and piezoelectric properties. The high piezoelectric response of the PMN-PHT ceramics is considered as relating to the MPB effect and their dense microstructure obtained via tailoring sintering conditions. The sintered PMN-PHT ceramics exhibit good thermal stability of piezoelectricity and ferroelectricity within the common usage temperatures, indicating that such ceramics are promising candidates for piezoelectric devices at elevated temperatures.
© EDP Sciences, 2016
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