3.1.5 Electromechanical coupling factors

2005 ◽  
pp. 10-11
Author(s):  
W. R. Cook jr
Keyword(s):  
Electromechanical Coupling ◽  
Coupling Factors

Microstructural effects on dielectric and piezoelectric behavior of calcium-modified lead titanate ceramics

1995 ◽  
Vol 10 (12) ◽  
pp. 3194-3203 ◽  
Author(s):  
J. Ricote ◽  
C. Alemany ◽  
L. Pardo
Keyword(s):  
Lead Titanate ◽  
Electromechanical Coupling ◽  
Resonance Method ◽  
Microstructural Characterization ◽  
Electromechanical Coupling Factor ◽  
Coupling Factor ◽  
Energy Dispersion Spectroscopy ◽  
Pore Size Distributions ◽  
Coupling Factors ◽  
Piezoelectric Behavior

This work presents an analysis on the main microstructural parameters that affect the dielectric and piezoelectric behavior of ceramics of calcium-modified lead titanate with Ca/Pb = 26/74. To this aim, ceramics were prepared under different sintering conditions to get a series of materials with different microstructures. Compositional and microstructural characterization was achieved by x-ray diffraction, energy dispersion spectroscopy, and optical microscopy. Computerized image analysis was carried out on the micrographs to determine grain and pore size distributions. These distributions were thoroughly analyzed using probability plots. Electromechanical coupling factors and piezoelectric coefficients were measured by the resonance method on thickness poled thin disks and rectangular bars. A similar combined effect of the grain size and the percentage of porosity on the inverse of the permittivity, the coupling factors at room temperature, and the temperature behavior of the electromechanical coupling factor k31 is found.

Effect of Molecular Mass of B-site Ions on Electromechanical Coupling Factors of Lead-Based Perovskite Piezoelectric Materials

2000 ◽  
Vol 39 (Part 1, No. 9B) ◽  
pp. 5593-5596 ◽  
Author(s):  
Yohachi Yamashita ◽  
Yasuharu Hosono ◽  
Kouichi Harada ◽  
Noboru Ichinose
Keyword(s):  
Molecular Mass ◽  
Electromechanical Coupling ◽  
Piezoelectric Materials ◽  
Coupling Factors

High-Performance Piezoelectric Single Crystals of Complex Perovskite Solid Solutions

MRS Bulletin ◽  
2009 ◽  
Vol 34 (4) ◽  
pp. 277-283 ◽  
Author(s):  
Zuo-Guang Ye
Keyword(s):  
Single Crystals ◽  
Solid Solutions ◽  
High Performance ◽  
Electromechanical Coupling ◽  
Piezoelectric Properties ◽  
High Strain ◽  
Complex Perovskite ◽  
Device Applications ◽  
Coupling Factors ◽  
Piezoelectric Performance

AbstractRelaxor-based single crystals of complex perovskite solid solutions, Pb(Mg1/3Nb2/3)O3–PbTiO3 [PMN–PT] and Pb(Zn1/3Nb2/3)O3–PbTiO3 [PZN–PT], exhibit extraordinary piezoelectric performance, with extremely high piezoelectric coefficients, very large electromechanical coupling factors, and exceptionally high strain levels. These materials outperform the currently used Pb(Zr1–xTix)O3 [PZT] ceramics, making them the materials of choice for the next generation of electromechanical transducers for a broad range of advanced applications. In this article, recent major advances in the development of piezocrystals are reviewed in terms of crystal growth, piezoelectric properties, crystal chemistry, domain structure, and device applications.

Influence of Dislocations in CdS Crystal on Its Electromechanical Coupling Factors

1971 ◽  
Vol 42 (3) ◽  
pp. 962-967 ◽  
Author(s):  
Noriyoshi Chubachi ◽  
Kazumoto Iinuma ◽  
Yoshimitsu Kikuchi
Keyword(s):  
Electromechanical Coupling ◽  
Coupling Factors
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