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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.

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.

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
References in periodicals archive ?
Constitutive equations for lower and upper converter layers, including the piezoelectric effect in layer 2 gave the following:
General models for linearly elastic materials with piezoelectric effect can be found in [20,21,22] and more recently, in [4,15].
Sensors using the piezoelectric effect can measure changes in pressure, sound, acceleration, temperature, strain, or force by converting them to an electrical charge.
One method of accomplishing this would be to implement an algorithm within the infrared device capable of calculating the concentration of pixel intensities(14) produced by the M13 virus' piezoelectric effect.
1957, On the piezoelectric effect of bone, Journal of the Physical Society of Japan, 12, 1158-1162.
33] coefficient is the principal element reflecting the piezoelectric behavior and its determination gives a quantitative evaluation of the piezoelectric effect.
Polyvinylidene fluoride (PVDF) is an organic-based piezoelectric material, but its action is weak because of an inverse piezoelectric effect, Teijin says, and further notes that "because PVDF generates an electric charge when exposed to heat, it is difficult to use PVDF as a material for electrical and electronic equipment, so applications are limited to sensors and such.
The electromagnetic traces get dissolved in electric dipoles of water consequent to cellular movements and cytosol succussion induced by digoxin induced sodium potassium ATPase inhibition mediated piezoelectric effect.
The geometrical deformation of the transmitter ring can modulates the phase or the amplitude (variation of the radiation resistance due to the geometrical deformation [14]) of a transmitted GHz/THz signal: the modulation is due to the piezoelectric effect of the AlN piezoelectric layer and is performed by applying a resonance control signal which can be found at lower frequencies.
The piezoelectric effect occurs in materials where an externally applied elastic strain causes a change in electric polarization producing a charge and a voltage across the material.
The piezoelectric actuator is based on the piezoelectric effect that consists in the variations of the dimensions of a body subjected to an electric voltage.
The principle of ultrasonic welding for thermoplastic material forms the basis whereby line voltage is first converted into an ultrasonic frequency and secondly into mechanical vibrations by using the reverse piezoelectric effect.