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Piezoelectric Constants
A piezoelectric ceramic is anisotropic. Physical constants
relate to both the direction of the applied mechanical or
electric force and the directions perpendicular to the applied
force. Consequently, each constant generally has two subscripts
that indicate the directions of the two related quantities, such
as stress (force on the ceramic element / surface area of the
element) and strain (change in length of element / original
length of element) for elasticity. The direction of positive
polarization usually is made to coincide with the Z-axis of a
rectangular system of X, Y, and Z axes (Figure 1.6). Direction X,
Y, or Z is represented by the subscript 1, 2, or 3,
respectively, and shear about one of these axes is represented
by the subscript 4, 5, or 6, respectively. Definitions of the
most frequently used constants, and equations for determining
and interrelating these constants, are summarized here. The piezoelectric
charge constant, d, the piezoelectric voltage constant,
g, and the permittivity, e, are temperature dependent
factors. Relevant Constants include: - Piezoelectric Charge Constant
- Piezoelectric Voltage Constant
- Permittivity
- Elastic Compliance
- Young's Modulus
- Electromechanical Coupling Factor
- Dielectric Dissipation Factor
- Frequency Constant
Review information on the most used constants and equations
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Recommended Reading
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subjects such as; models for resonant sensors, interface
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Upcoming Events
MR-guided Focused Ultrasound 2010
2nd International Symposium
When: October 17-20, 2010
Where: Westfields Marriott near Dulles International Airport, Washington, DC
The symposium will be a premier event for scientists, clinicians and others interested in current and future applications of MR-guided focused ultrasound. The program will offer a multifaceted exploration of this emerging field and feature plenary sessions, panel discussions, poster presentations and technical exhibits.
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products. A copy of the call for papers will be posted in on the UIA website later in 2010 - keep an eye out for updates!
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