Questions tagged [piezoelectric]
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Will a piezoelectric material under constant pressure maintain its electrostatic charge/behave like an electret?
The question title pretty much says it all. Assuming the piezoelectric material does not decompress, I assume the electrostatic potential between its poles should remain constant. Will it maintain ...
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Difference between polarization angle and poling angle in piezoelectric material
I was reading the research article: Demonstration of optimizing piezoelectric polarization in the design of a flextensional actuator, where I had confusion differentiating between poling angle, which ...
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Piezoelectric effect in terms of classical thermodynamics
Non-volumetric work associated with the increase in polarization in a dielectric is equal to $dW = E dP$, where $E$ and $P$ are vectors of the electric field and the total polarization in the ...
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How does acoustic transducers have multiple resonances?
I am working with determining the variation of impedance of acoustic transducer with frequency. Below is the Van Dyke equivalent model of the transducer.
By analyzing this transducer equivalent model ...
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What does strain hysteresis look like in hard piezoelectric materials?
Many ferroelectric piezoelectric materials show a butterfly-shaped strain-field curve when they are cycled through (high) positive and negative electrical fields, see e.g. here (I copied the ...
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Pressure sensors vs. piezoelectric sensors
In simple terms, what is the difference between pressure sensors and piezoelectric sensors?
I did some google search online and could not come to a good conclusion.
Say you make a 'sensor' in the lab ...
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How to know which components of piezoelectric tensor vanish according to the poling direction?
If the piezoelectric material has a polarization in direction 3 (thickness direction), $T_1$, $T_2$, and $T_3$ stress tensors can produce electric displacement $D$ in only direction 3; And $T_5$ (or $...
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Positioning a piezo stack along the optical axis
I'm having a question related to experimental physics.
I need to move an optical fibre 50 nm close to a sample at vacuum and cryogenic conditions. The main problem is that my UHV chamber is very small ...
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How does an airflow sensor work? [closed]
There are 4 piezoresistive sensors placed at A, B, C and D.
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Can the polar crystalline polymorphs of PVDF (beta, gamma or delta) be tuned to respond to ultra-high frequency sources?
I am interested in determining whether or not it is possible to tune, by polling and/or nanomaterial loading, PVDF such that it would respond to stimulus from ionizing radiation such as Gamma rays.
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Does the energy output of a piezoelectric material increase when its dielectric constant is incressed?
According to the output voltage equation, the output of a piezoelectric material increases when its dielectric constant is increased. But it reduces the coupling constant. Since that can we directly ...
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Can I guess the order of magnitude of the current inside a spark based on a picture?
In this video, Steve Mould explains how an inflammable gas can be ignited with a spark created by the piezoelectric effect. At 01:11, there is a close up on the spark with a scale in the background.
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Piezoelectric circular plate resonant frequency
I was trying to make a project where I was using piezoelectric. I gave him vibration by making some noise around here, and when I saw the output at DSO, it showed me 49 Hz. but I need resonant ...
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What is convention of predefined coordination system for defining elastic constant of a specific material
I try to find the elastic constants of LiTaO3 from online databases. I did find a page that lists them https://www.roditi.com/SingleCrystal/Lithium-Tantalate/LiTaO3-Properties.html
As I know, the ...
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Relation between rank of tensor and electromechanical property of a material
In piezoelectricity, the piezoelectric tensor is of rank three and its a reason why piezoelectricity is not present in all materials whereas for electrostriction, it is present for all crystal ...
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