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16 Jul 2012

Volume 101, Issue 3, Articles (03xxxx)

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Appl. Phys. Lett. 101, 033301 (2012); http://dx.doi.org/10.1063/1.4734240 (5 pages)

Ting-Gang Chen, Bo-Yu Huang, En-Chen Chen, Peichen Yu, and Hsin-Fei Meng
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Remarkably high-temperature stable piezoelectric properties of Bi(Mg0.5Ti0.5)O3 modified BiFeO3–BaTiO3 ceramics

Changrong Zhou, Antonio Feteira, Xu Shan, Huabin Yang, Qin Zhou, Jun Cheng, Weizhou Li, and Hua Wang

Appl. Phys. Lett. 101, 032901 (2012); http://dx.doi.org/10.1063/1.4736724 (4 pages) | Cited 8 times

Online Publication Date: 16 July 2012

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Dense (1-y)BiFe1−x(Mg0.5Ti0.5)xO3 − yBaTiO3 (BFMT-BT, y = 0.29, x = 0-0.12) ceramics with a pseudocubic perovskite crystal structure exhibit remarkably high-temperature stable piezoelectric properties. In particular, x = 0.03 BFMT-BT ceramics, with a Curie temperature, Tc, of ∼425 °C, show a stable piezoelectric coefficient, d33, of ∼155 pC/N up to a depolarization temperature, Td, of ∼400 °C. This Td is higher than Tc for Pb(Zr,Ti)O3, therefore suggesting BFMT-BT ceramics to be promising high-temperature Pb-free piezoelectric materials.
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77.65.Bn Piezoelectric and electrostrictive constants
77.84.Cg PZT ceramics and other titanates
77.80.bg Compositional effects
61.66.Fn Inorganic compounds
77.22.Ej Polarization and depolarization

Characterization of piezoelectric ceramics and 1-3 composites for high power transducers

Hyeong Jae Lee, Shujun Zhang, Richard J. Meyer, Jr., Nevin P. Sherlock, and Thomas R. Shrout

Appl. Phys. Lett. 101, 032902 (2012); http://dx.doi.org/10.1063/1.4737651 (4 pages) | Cited 1 time

Online Publication Date: 18 July 2012

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The high power characteristics of various piezoelectric ceramics and 1-3 composites were investigated. In contrast to “hard” Pb(Zr,Ti)O3, modified (Bi0.5Na0.5)TiO3 based ceramics were found to show a relatively linear electromechanical response under high drive conditions due to their high stability of mechanical quality factor. The effects of high drive field and duty cycle on the behavior of 1-3 composites were analyzed by varying active and passive components. Improved high power characteristics of 1-3 composites were achieved by selection of optimized composite components, with enhanced electromechanical efficiency and thermal stability under high drive conditions.
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81.05.Je Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides)
85.50.-n Dielectric, ferroelectric, and piezoelectric devices
77.84.Cg PZT ceramics and other titanates
77.65.-j Piezoelectricity and electromechanical effects
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