piezoelectric effect


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Related to piezoelectric effect: Piezoelectric transducer

piezoelectric effect

(pīē'zōĭlĕk`trĭk), voltage produced between surfaces of a solid dielectric (nonconducting substance) when a mechanical stress is applied to it. A small current may be produced as well. The effect, discovered by Pierre Curie in 1883, is exhibited by certain crystals, e.g., quartz and Rochelle salt, and ceramic materials. When a voltage is applied across certain surfaces of a solid that exhibits the piezoelectric effect, the solid undergoes a mechanical distortion. Piezoelectric materials are used in transducerstransducer,
device that accepts an input of energy in one form and produces an output of energy in some other form, with a known, fixed relationship between the input and output. One widely used class of transducers consists of devices that produce an electric output signal, e.g.
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, e.g., phonograph cartridges, microphones, and strain gauges, which produce an electrical output from a mechanical input, and in earphones and ultrasonic radiators, which produce a mechanical output from an electrical input. Piezoelectric solids typically resonate within narrowly defined frequency ranges; when suitably mounted they can be used in electric circuits as components of highly selective filters or as frequency-control devices for very stable oscillatorsoscillator, electronic
, electronic circuit that produces an output signal of a specific frequency. An oscillator generally consists of an amplifier having part of its output returned to the input by means of a feedback loop; the necessary and sufficient condition for
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.
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piezoelectric effect

[pē¦ā·zō·ə′lek·trik i′fekt]
(solid-state physics)
The generation of electric polarization in certain dielectric crystals as a result of the application of mechanical stress.
The reverse effect, in which application of a voltage between certain faces of the crystal produces a mechanical distortion of the material.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

piezoelectric effect

, piezoelectricity
Physics
a. the production of electricity or electric polarity by applying a mechanical stress to certain crystals
b. the converse effect in which stress is produced in a crystal as a result of an applied potential difference
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
The proposed characterization gives an idea about the parameters that directly influence the dielectric and mechanical proprieties in porous EVA copolymer films for reaching pseudo piezoelectric effects. Our study shows that the dielectric parameters improve with increasing the porosity.
The increase in crystallinity results in an increase in elastic modulus around 3 times, and piezoelectric effect is found to be enhanced around 55%.
For a long time, the piezoelectric effect was only known for crystals.
Keywords: piezoelectric effect, electricity, piezoelectric power, composite, generator.
During acceleration the seismic mass exerts a force on the piezoelectric material beam resulting in the generation of a charge due to the piezoelectric effect. Piezoelectric accelerometers have many desirable features, such as extremely low power consumption, high sensitivity, inherent temperature stability, compatibility with CMOS manufacturing process [31-33], high Q in the range of 80 to 100, low damping, high output impedance, and wide operating temperature range (up to 300[degrees]C) [31, 34, 35].
To account for the piezoelectric effect, flexoelectric effect, and nonlocal mechanical and electrical effects, an electric Gibbs energy density Gb including the energy of elasticity, piezoelectricity, flexoelectricity, and couple stress was proposed by
Thus, this mechanically induced electrical energy has great regulatory effect on the cellular and molecular levels." Which means that NASA's new bandage adds to the piezoelectric effect already produced in human cells, thus making wounds heal faster.
Elastic-viscoplastic material with internal state variable and piezoelectric effect, also called electro-elasto-viscoplastic material with internal state variable is given by
Sensors using the piezoelectric effect can measure changes in pressure, sound, acceleration, temperature, strain, or force by converting them to an electrical charge.
This is the first time anyone has shown the piezoelectric effect in atomically thin films, although the property has been predicted.
A reverse piezoelectric effect is used to create a motion in a piezo stack, with many layers of a piezoelectric material laminated with electrodes.