Increasing piezoelectric effect in radially polarized soft lead zirconate titanate (PZT) by pressure treating and its practical applications

2020 ◽  
Vol 148 (4) ◽  
pp. 2741-2742
Author(s):  
Eric K. Aikins
2007 ◽  
Vol 102 (2) ◽  
pp. 024111 ◽  
Author(s):  
Ralf Theissmann ◽  
Ljubomira A. Schmitt ◽  
Jens Kling ◽  
Roland Schierholz ◽  
Kristin A. Schönau ◽  
...  

2000 ◽  
Vol 15 (6) ◽  
pp. 1248-1249 ◽  
Author(s):  
Shan Wan ◽  
Keith J. Bowman

Tetragonal ferroelectric materials are polarized to induce the anisotropy necessary for the piezoelectric effect. This poling of the material is inherently an orientation process. Pole figure texture measurements of poling and cross-poling in a lead zirconate titanate Navy VI material show domain motion. The resulting axisymmetric and three-dimensional textures demonstrate the contribution of 90° domain motion to piezoelectricity. Cross-poling results in strong orientations with lower applied fields than in the initial poling steps.


Author(s):  
J S Burdess

The paper considers the theory of a new type of vibratory rate gyroscope. The design considered is based upon a thin cylindrical shell of radially polarized lead zirconate titanate on which are deposited drive and pick-off electrodes. The equations of motion of the cylindrical shell are derived and the response of the gyroscope to constant and harmonic rates of turn is determined.


2007 ◽  
Vol 102 (7) ◽  
pp. 079902 ◽  
Author(s):  
Ralf Theissmann ◽  
Ljubomira A. Schmitt ◽  
Jens Kling ◽  
Roland Schierholz ◽  
Kristin A. Schönau ◽  
...  

Author(s):  
M.L.A. Dass ◽  
T.A. Bielicki ◽  
G. Thomas ◽  
T. Yamamoto ◽  
K. Okazaki

Lead zirconate titanate, Pb(Zr,Ti)O3 (PZT), ceramics are ferroelectrics formed as solid solutions between ferroelectric PbTiO3 and ant iferroelectric PbZrO3. The subsolidus phase diagram is shown in figure 1. PZT transforms between the Ti-rich tetragonal (T) and the Zr-rich rhombohedral (R) phases at a composition which is nearly independent of temperature. This phenomenon is called morphotropism, and the boundary between the two phases is known as the morphotropic phase boundary (MPB). The excellent piezoelectric and dielectric properties occurring at this composition are believed to.be due to the coexistence of T and R phases, which results in easy poling (i.e. orientation of individual grain polarizations in the direction of an applied electric field). However, there is little direct proof of the coexistence of the two phases at the MPB, possibly because of the difficulty of distinguishing between them. In this investigation a CBD method was found which would successfully differentiate between the phases, and this was applied to confirm the coexistence of the two phases.


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