Questions tagged [piezoelectric]
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Is there an electric field in a poled piezoelectric crystal at rest?
From my understanding, after a piezoelectric crystal is poled, all the dipoles are roughly aligned inside it, so that the piezoelectric effect is not negligible. However, wouldn't that result in a ...
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2answers
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What makes quartz oscillators vibrate?
I understand that the principle behind it is piezoelectricity and electrostriction (inverse piezoelectricity), but how does one make the crystal vibrate?
The only thing I can think of is using an ...
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Piezoelectric strain curves and magnetostrictive strain curves
I am trying to understand the differences in the strains produced in piezoelectric materials and magnetostrictive materials.
Magnetostrictive materials will tend to strain the same way along the ...
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1answer
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Perpetual Motion Machine 1: Magnetic Superconductor Loop Generating Energy with Piezoelectrics [closed]
I know there are a lot of perpetual motion machine designs out there, but I haven't found one that looks like this one. I will use this diagram.
Assume the entire ring is made of a superconducting "...
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Energy can be created
Consider a device which converts kinetic energy into electrical energy ( just like piezoelectric generator). Now I install this on two trains of very high mass approaching each other (moving in ...
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How are the orientations and cuts of crystal substrates determined?
I have been looking at piezoelectric crystals, LiNbO3 primarily, so piezoelectric devices. But I have had trouble understanding the cuts and orientations that are referred to with the rotated cuts.
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Is there a way to attach a mirror to a piezoelectric?
I want to use a mirror on the piezoelectric in Mickelson setup, how should I connect this?
Resonance frequency of piezoelectric is important for me. Is there a method to not change the frequency?
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30 views
Anti resonance frequency of piezoelectric
There is a method to measure anti resonance frequency of piezoelectric? The RC circuit and this relation and equations can measure resonance frequency.
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Why Shifting peaks in impedance-frequency graph with changing the amplitude of input frequency?
we used a RC circuit for measuring resonance frequency of a piezoelectric. And each time, we changed the frequency domain of the input. The impedance model, in terms of frequency, indicates that the ...
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Suggest the method to that the piezoelectric resonance frequency does not change after attachment a piece?
When the piezoelectric is connected to a element such as mirror to use in interferometer, the resonant frequency decreases, we want to use the piezoelectric and mirror on which we can use it, how can ...
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1answer
46 views
How to estimate energy of piezo igniter discharge?
Question for fun. We all know piezo igniters, these small friends, like following one:
All of them are probably quite similar: same spring, same piezo, same hit force, and so on.
Also I have some ...
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Why do electric moments in piezoelectric crystals have a random distribution of orientations to begin with?
Above is just one picture used to visualize the piezoelectric effect. The explanation usually is that as an electric field is applied to the material, the electric moments of the molecules in the ...
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Piezoelectricity and conservation of energy
This is how I understand piezoelectricity: The molecules of a material have electric dipole moments. When a sample of the material is under mechanical stress, the molecules "slide"/"turn" and become ...
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Piezoelectric powder solution to measure extremely high pressure
Idea - While reading about piezoelectric materials, I thought about mixing piezoelectric powder with silicon oil to measure extremely high pressures (of up to 4000bar).
Experiment - Consider a ...
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1answer
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PiezoActuator energy loss in a fluidic environment
I am trying to model the loss of a Piezo actuator in a fluidic environment.
A Piezo actuator can be modeled using a Equivalent Circuit model stated below.
http://www.noliac.com/typo3temp/GB/...
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1answer
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Piezoelctric Ceramic Transducing Capabilties
Piezoelectric ceramics are able to work as transducers, outputting electrical energy when mechanical stress is inputted. However, most ceramics have high static voltage and low current and power ...
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2answers
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What does the term “inversion symmetric” mean?
I've read the responses to the question `"Lack of inversion symmetry" in crystal?' but I'm still unsure about the meaning of inversion symmetry. Which of the following two dimensional ...
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1answer
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Difference between Piezoelectric effect and Faraday's law of induction?
I was researching how the transducer works for an ultrasound machine.What I learned was from a piezocrystal (quartz) the applied mechanical stress can produce an alternating electric field (from the ...
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1answer
107 views
Do piezo materials change volume?
I know that piezoelectric materials change shape when voltage is applied to them,but do they also change volume? Do they keep same volume and just change their geometrical shape,or do they also ...
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What are some good textbooks on material and crystal physics?
I am looking for good physics textbooks on materials and crystal physics, I do not mind if they are a bit general but they must cover useful topics. However, the specific topics I would like some ...
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1answer
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Is there a difference between piezo electric actuator and piezo actuator?
I read concepts of both the piezoelectric actuator and piezo actuator in scientific articles.
Are the notions totally same? or is there a difference between a piezoelectric actuator and piezo ...
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1answer
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What is the physical mechanism behind piezoelectricity in PZT? (no maths please)
What exactly does applying a mechanical force to a PZT ceramic do to its crystal structure that results in a potential difference being generated across the crystal?
I can't work out whether the ...
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1answer
69 views
What is the equivalent of piezoelectricity for optics/photonics?
Piezoelectricity can be considered as the electromechanical transduction behaviour, where a material can convert mechanical deformation/energy directly to voltage difference / electricity or vice ...
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1answer
652 views
Why do piezoelectric elements have a resonant frequency?
While working with a piezoelectric element, I noticed some high frequency oscillations at 6kHz. I can't figure out why the piezo element has a resonant frequency. This is unlikely to be noise as there ...
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What is physically pushing on the piezoelectric disk?
When I taped a piezoelectric disk to a piece of plate glass I was surprised that a simple blue laser pointer moved the disk enough to produce almost a 1/10th of a volt Something physically hit the ...
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Could a 'pulsar-like' planet exist due to the following properties?
A planet has been discovered with a composition believed to be made up of diamond. If such a planet were to host a massive satellite of high eccentricity, it seems possible that the large tidal forces ...
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Why would piezo voltage output at high temperature increase with use?
I am using an inexpensive piezoelectric diaphragm as a contact sensor but am getting an unexpected effect: When theelement is stressed by cyclicly putting under pressure and releasing the pressure at ...
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3answers
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What are crystals used for in radio?
What are crystals used for in radio? I think I sort of know the answer to this but I would like a more detailed explanation. To my current understanding, piezoelectric crystals are used to modulate ...
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Quartz piezoelectric battery
I'm designing a battery that uses quartz crystals to hold/produce a current for a long time using piezoelectricity.
My question is:
Would it be more efficient to have multiple small quartz crystals ...
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Work done in Polarizing a Piezoelectric
Work Done by a conservative force in a complete cycle is zero. Does that mean the the Ferroelectric Hysteresis loop represents zero work done ?
So according to 1st Law of Thermodynamics, the Energy ...
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1answer
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Why is BaTiO3 piezoelectric, but CaTiO3 not?
When BaTiO3 is cooled below the Curie point (120°C), the cubic structure changes slightly, so that $Ti^{4+}$ shifts by 0.006nm away from its position at the center of the cube. I don't know why this ...
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1answer
537 views
Smallest droplet produced in a continuous inkjet printer
I'm reading about inkjet printers, and I was wondering - how small do the droplets created get? Wikipedia's article says
A piezoelectric crystal creates an acoustic wave as it vibrates within the ...
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How to calculate the deflection of GFC under Macro Fibre Composite load?
I have this 85x14x0.3mm MFC(Macro Fiber Composite) bonded to GFC(Glass Fibre Composite)200x85x2mm. When MFC is powered up GFC sheet undergo deflection. I only know how to calculate deflection from ...
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Audio Speaker as Shaker for Piezoelectric application
so as a continuation of my research in piezoelectric effect i need a frequency source (electromagnetic shaker) to generate piezoelectric voltage. But my problem is i don't have a shaker. So my ...
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Piezo material under static force
Consider a piezo material, say quartz. It produces electric charges when deformed. Suppose a static force is applied to it, which results is charges on two surfaces. If these charges are drained away ...
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How much electric energy can be produced by a given size of piezo material?
Piezoelectric materials produce electric charges when deformed. For a given size of a piezoelectric material, say quartz, how much total electric energy can be produced ?
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How to measure resonant frequency of piezoelectric material
I just want to know the resonant frequency of piezoelectric material. We can determine by using the equation which is related to the dimension of the material. But i want to confirm it by applying AC ...
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1answer
833 views
Vibrational frequency of piezoelectric material
When a piezoelectric material experience a stress it generates voltage, and also when you applied voltage the piezo-material experience a vibrational frequency. Using oscilloscope we can determine the ...
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Do Thorlabs piezoelectric transducers s PAZ009 and PAZ015 wor in vacuum?
We have few closed loop piezoelectric transducers (stacked) from Thorlabs, part numbers PAZ009 and PAZ015. I have prepared all the required feed through. I want to use them under rough vacuum $\sim 10^...
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Can a piezoelectric material only vibrate at one frequency?
Given a material X with piezoelectric properties which is used in a ultrasonic transducer, what determines the working frequency of said transducer?
If hypothetically such a transducer is specified ...
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Piezoelectricity from high pressure
Is it possible to convert 10Mp vapor or hydraulic pressure to electricity using piezo crystals? What would be the energy output in watts or the theoretical maximum conversion efficiency?
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Crystals in piezoelectricity
I was reading about piezoelectricity and crystals and found such a statement (on Wikipedia) : For example, a 1 cm3 cube of quartz with 2 kN (500 lbf) of correctly applied force can produce a voltage ...
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Would a previously poled piezoelectric material experience a force aligning it with an external electric field?
I'm wondering if it would possible to crush a poled PZT object, disperse the powder into a thermoplastic (with a melt temperature below the Curie temperature of PZT) and align the 'crystal shards' ...
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Piezoelectric water flow detection
Can a piezoelectric sensor detect constant water flow, or just the moment when the water is turned on and off?
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Piezoelectric effects of naturally shaped quartz crystal for maximium Q?
Background
Based on helpful comments and links here and also from my question on the electronics stackexchange, I have learned that the quartz crystals are nature's transducers of energy, allowing ...
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1answer
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Vibration of Quartz crystal
What does it mean when we say quartz crystal vibrates.it is very strange to read that a particular solid vibrates with period of 10^(-6) seconds.does it mean something else when it is written quartz ...
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1answer
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Calculating voltage in piezoelectric material
The piezoelectric constitutive law is defined by the two equations:
$$S=s T+dE\\
D=d T+\epsilon E$$
$S$: Strain. $T$: Stress. $E$: Electric field. $D$: electric charge-density displacement. $\...
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366 views
where does electricity come from in piezoelectric?
I have some questions here. BaTiO3 is a material which exhibit piezoelectric effect when we give external pressure on it. It contain Ba2+, Ti4+, and O2- ion in its crystal unit. The Ti4+ ion will move ...
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2answers
179 views
Piezoelectric polarity
After a few days, I cannot find an answer to this question:
Besides mechanical stress, is there another way to induce a negative charged surface on quartz?
Note: several scholarly articles kept ...
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Piezo transducer face movement
I have an ultrasonic piezo transducer that I am running with a 60Vpp signal. The material is probably PZT or similar. Can anyone supply a ballpark figure for the likely peak to peak mechanical ...
