Doping effects of strontium on the piezoelectric and dielectric properties of Ca additive Sm-modified PbTiO3 ceramics

AbstractPiezoelectric ceramics are potential high-power electro-acoustic sources, and have been studied for many years. However, when these devices are driven under high level vibration, the electromechanical characteristics depart significantly due to the loss and nonlinear behavior in terms of elastic and dielectric properties. In this paper, we present results concerning the development of modified Pb(Mgl/3Nb2/3)O3-PbTiO3 (PMN-PT) ceramics for high-power application. We have focused efforts on base PMN-PT compositions close to the morphotropic phase boundary. Different mono-doping have been studied to understand the doping effects on the properties of PMN-PT ceramics and, moreover, to improve the properties for the high-power application. Of all the substitutents investigated in this study, Mn-doping was found the only one to improve the properties of PMN-PT significantly for high-power application by reducing the total loss (including mechanical loss as well as the dielectric loss), yet keeping the coupling factor constant. This work is supported by Office of Naval Research.

Download Full-text

Doping effects of Nb additives on the piezoelectric and dielectric properties of PZT ceramics and its application on SAW device

Sensors and Actuators A Physical ◽

10.1016/j.sna.2004.02.020 ◽

2004 ◽

Vol 113 (2) ◽

pp. 198-203 ◽

Cited By ~ 83

Author(s):

Sheng-Yuan Chu ◽

Te-Yi Chen ◽

I-Ta Tsai ◽

Walter Water

Keyword(s):

Dielectric Properties ◽

Pzt Ceramics ◽

Doping Effects

Download Full-text

Effects of La2O3 on the Piezoelectric Properties of Lead-Free (Bi0.5Na0.5)0.94Ba0.06TiO3 Piezoelectric Ceramics

Materials Science Forum ◽

10.4028/www.scientific.net/msf.510-511.538 ◽

2006 ◽

Vol 510-511 ◽

pp. 538-541 ◽

Cited By ~ 2

Author(s):

Y.-J. Son ◽

Y.G. Choi ◽

Joon Chul Kwon ◽

K.W. Cho ◽

Young Moon Kim ◽

...

Keyword(s):

Dielectric Properties ◽

Sintered Density ◽

Piezoelectric Properties ◽

Lead Free ◽

Environment Friendly ◽

Bulk Ceramic ◽

System A ◽

Maximum Value ◽

Doping Effects ◽

Dielectric And Piezoelectric Properties

In an approach to acclimate ourselves to the recent ecological consciousness trends, a lead free piezoelectric material, bismuth sodium barium titanate (Bi0.5Na0.5)0.94Ba0.06TiO3 (BNBT), was considered as an environment-friendly alternative to the PZT system. A perovskite BNBT was synthesized by the conventional bulk ceramic processing technique.La2O3 as a dopant was incorporated into the BNBT system up to 0.025 mol, and the doping effects on subsequent piezoelectric and dielectric properties were systematically investigated. In the case of La2O3 addition, the formation of grain boundary coherency was remarkably increased, and the sintered density was increased with increasing La2O3 contents. Piezoelectric and dielectric properties were shown to have the maximum value at 0.02 mol of La2O3 addition. La3+ ions were believed to act as a softener in the BNBT system and to enhance dielectric and piezoelectric properties in this study.

Download Full-text