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Definitions (30)
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piezo systems
A common term for "bender" or flexure element. Two layers of piezoceramic with or without a center shim.
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capacitance
Referring to capacitance measurement on piezoelectric sample, the capacitance value obtained with sample being totally free of mechanical constraint during measurement process.
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capacitance
Referring to capacitance measurement on a piezoelectric sample, the capacitance value obtained with sample being totally constrained from motion (i.e., "clamped") during measurement.
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coercive field
Relating to a uniform ferroelectric material, the electric field required to oppose and bring to zero the internal polarization.
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charge constant
see "d" Constant
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compliance
see "s" Constant
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coupling coefficient
A dimensionless number related to the effectiveness of electrical to mechanical energy conversion in nonresonant piezoelectric devices.
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curie temperature
Temperature at which the crystal structure undergoes a phase change from non-symmetrical lattice (such as tetragonal) to symmetrical lattice (such as cubic). Drastic dielectric and piezoelectric coefficient changes accompany this phase change.
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d constant
The piezoelectric constant relating applied electric field to resultant strain (units of meters per volt).
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density
In reference to piezoceramics, the mass per unit volume of a fired ceramic body. High density is an important measure of the quality and uniformity of ceramic material because it indicates the absence of microscopic pores which weaken the ceramic and cause poling difficulties.
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