Piezoelectric Properties of Fine-Grained Pb(Mg1/3Nb2/3)O3--Pb(Zr,Ti)O3--Bi(Zn1/2Ti1/2)O3 Quaternary Solid Solution Ceramics

• Published in: Jpn J Appl Phys 2013-06, Vol.52 (6), p.061502-061502-7
• Main Authors: Yue, Ruifang, Hou, Xianbo, He, Wenze, Yu, Jian
• Format: Article
• Language: English
• ISSN: 0021-4922; 1347-4065
• DOI: 10.7567/JJAP.52.061502

On the basis of solid state reaction eutectic behavior between Pb(Mg 1/3 Nb 2/3 )O 3 --Pb(Zr,Ti)O 3 (PMN--PZT) and metastable perovskite-type Bi(Zn 1/2 Ti 1/2 )O 3 (BZT), perovskite-structured PMN--PZT--BZT quaternary solid solution piezoceramics with various compositions were experimentally demonstrated with an intrinsic low sintering temperature in the windows of 950--1050 °C. These fine-grained densified PMN--PZT--BZT ceramics were able to be poled sufficiently at room temperature through polarization--electric field hysteresis loop measurement, different from normal poling treatment with DC bias field at high temperature, which will simplify future device processing of monolithic multilayer piezoceramic transducers. A typical piezoelectric property of dielectric constant $\varepsilon_{33}{}^{T}/\varepsilon_{0} = 3471$, piezoelectric constant $d_{33} = 480$ pC/N, planar coupling coefficient $k_{\text{p}} = 0.41$, thickness coupling coefficient $k_{\text{t}} = 0.50$, mechanical quality factor $Q_{\text{m}} = 68$ and relaxor ferroelectric phase transition temperature $T_{\text{m}} = 167$ °C at 1 MHz was obtained for the fine-grained densified Pb 0.96 Sr 0.04 (Mg 1/3 Nb 2/3 ) 0.37 Zr 0.24 Ti 0.39 O 3 +3%Bi(Zn 0.5 Ti 0.5 )O 3 +2%NiO ceramics sintered at 1020 °C, which is much promising to manufacture monolithic multilayer piezoelectric transducers with Ag95/Pd5 as inner electrode material.