Piezoelectric Definition and 130 Threads

Can piezoelectric crystals produce electricity from compression only ? When continuous compression and tensile forces on them generate AC voltage source, can only compression force give me a DC voltage source ? Is there a chance that the crystal will initially act as a Voltage source but soon...

Homework Statement [/B] ZnS crystalizes in the B3 type structure with the space group is F¯43m. This structure is shown below and can be regarded as the bi-atomic form of the diamond lattice (F d¯3m). Upon applying a force along the [1,1,1] direction, the crystal might experience a change in...

My project is about to store the electrical energy produced by the gas stove lighter. I search and found that the gas lighter may produce 800 volt and 0 current. So now I need to know how to increase this current and store into the battery. Plz give me some idea...

Homework Statement Piezoelectric crystals will change about 0.1% of their static dimension when an external electric field is applied to the material. Homework Equations 1. What happens with the static dimension if the external electric field applied is a constant? 2. Will the static dimension...

Hi, I'd like to get some help with my homework. Piezoelectric crystals will change about 0.1% of their static dimension when an external electric field is applied to the material. 1. What happens with the static dimension if the external electric field applied is a constant? 2. Will the static...

Hello everyone! Seeing as this is my first post, I'll give you a basic background of who I am: My name is Andrew Raisbeck; I graduated from university with a Bachelor of Computing (Computer Science) degree a little over a year ago, and I now work full-time for the government of Canada. Since I...

Hello all, whether the Refractive index of piezoelectric materials (Example: Polyvinylidene fluoride-PVDF ) changes by the application of pressure, strain or force ?

hello! what is the maximum of electrism we can get from piezoelectric materials? can you give me some examples, or are there any tables, showing for each gram of piezoelectric material, applied a force of 1N, we get 1 ampere constant(?) current or something? thanks!

Arduino DUE based project for testing amplitude-phase response of the sensor or circuitry. Resonance frequency detection based on zero phase crossing, range up to 250 kHz. Check it out : https://coolarduino.wordpress.com/2014/12/24/lcq-meter-amplitude-phase-characterizer-piezo-tester/...

Would it be possible to put piezoelectric devices on the front of a car so that when the car is moving forward, the pressure from the wind on the car and piezo devices produces power to charge a battery? If the wind is strong enough, do you think there would be a considerable amount of energy...

Hi All, I am measuring the impedance response of a piezoelectric component. It has a unique impedance response having a resonance portion (low impedance ~10-30ohmns) and large impedance (100k-200kohmns) within a 2kHz bandwidth. See the webpage for a figure showing the impedance behavior. The...

I do not have much knowledge in piezoelectric, but all the piezoelectric I've read up on seems to only achieve maximum displacement in measurement values of microns. Is it even possible for some piezoelectric actuator to bend a 10 meter long cantilever beam up to 1 meter at its maximum...

Hi , can anybody make me sense of these equation on which i am striking my head for last 2 months. I am trying to understand piezoelectric effect. And in process of which i came to see so called strain based form of equations related to direct(Equation no.2) and reverse(Equation no. 1)...

I was inspired by this article http://science.howstuffworks.com/environmental/green-science/house-music-energy-crisis1.htm to wonder if one could put piezoelectric crystals in the sole of a shoe and perhaps harness the energy to charge their iPod?Can someone let me know if this is feasible and...

Hello, Actually i want to make use of Clamping Force of Injection Moulding Toggle System to produce Electricity by making use of Piezoelectric effect. For example, if we place a quartz crystal (or any other piezoelectric material) on either side of the platen, then on each machine cycle, when...

From what I understand the Piezoelectric effect occurs when there is a change in dipole moment. If a crystal was to be accelerated along the x direction then the crystal will undergo a length contraction. My question is, would this not cause a change in dipole moment from an outside observer and...

Hello :) I am Jon and I am conducting an experiment with Quartz Crystals to test their piezoelectric properties. I wanted to ask you a question about my experiment set up. Which type of force is required to be applied for voltage to be produced? Could I apply a compressive force with...

Hi everyone! First of all I would like to say that my native language is not english, so I will try to explain myself as good as I can This is my first thread in which I would like to ask a question a friend of mine asked to me, hoping he could get some answer from me, but I couldn't give him...

dear all, I am working on a problem about the vibration of a piezoelectric ring with electrodes on the upper and lower surface. the coordinate system is cylinder coordinate system. the structure is shown below. This is an axisymmetry problem. the polarization of the piezoelectric ring is...

I am planning to do a small project based on piezoelectric effect. The idea is to sandwich a piezoelectric crystal in-between metal plates and use it as a school bell or a small calling bell. I am planning to use a battery (need not be full, which holds charge enough to ring the bell for the...

The title pretty much says it all. I want to know if any piezoelectric materials can fully function in constant contact with water. If so, how long a lifetime could be expected and would there be any polluting to the water? Thanks

I am currently planning a Piezoelectric "experiment" and need to finish it in 22 days. I have no problem obtaining a clamp and synthesising rochelle salt. However, I need two things. One is something which I could use to measure the force applied to the crystal when tapped and two a cheap...

Wondering if anyone has any knowledge on electricity generation from piezoelectrics. I am a senior in high school with electromagnetic physics and basic mechanical engineering classes completed, but I am no electrical engineer, so simplicity is key. I am looking to design a shoe that...

Hello! We're in 8th grade and our doing a project-not homework. Our goal is to put piezoelectric plates inside a pillow and harvest the energy from the pressure of the head on the plate during the night and use it to charge a phone. However, from this point we are a little confused. We've been...

Dear all, How is the efficiency of piezoelectric transformer higher than electromechanical coupling factor? Thank you, Husain

Hi all, I have a piezoelectric pressure sensor from KISTLER instruments. (http://www.intertechnology.com/Kistler/pdfs/Pressure_Model_211B.pdf). I am pretty new to this field and wondering how to process the signal from these sensors? I have data over a 3 minute span from this sensor(taken at...

Hi, i have been working on this problem for a while. i just need some guidance. the question is: design a ztube scanner suitable for displacing ±1 micron displacement at 200V. i am using this equation: ΔL=([d]_{}[/31]×V×L)/t ΔL=(d31 ×L×V)/t ΔL=change in length = 1micron...

Would a piezoelectric crystal create a negative voltage if held within a vacuum? Perhaps it's my misunderstanding of the materials properties, but it seems that if there is zero net output within the "creation"(0) atmosphere, and any slight elastic deformation shows itself in the form of an...

How does electron in a piezoelectric material flow to produce electricity? I read about piezoelectricity but I don't know exactly how it works. When stress is apply to piezoelectric material, the structure deform and create non-zero dipole moment and then what happen? How does electron flow...

Hello I have been thinking about an idea for quite a while. It uses piezoelectric materials to enhance the motions of a human wearer. If someone were to move their leg up, the piezoelectric material will convex and produce a voltage this voltage would be used to trigger a semiconductor that...

Is there a type of piezoelectric material that only produces a current when bent one way or only bends one way when applied a current?

Hi All, I'm wondering if anyone is aware of a piezoelectric material that is both liquid and is transparent/colorless/ lower refractive index? Is there database online where I could compare these values? Google has not been kind to me:( Any help would be so appreciated.

Hi, I want to use piezoelectric material to harvest compression energy, i need to calculate the power output but i can't find enough information on the web to figure it out... First, I want to learn how to calculate the power output of piezoelectric material using d33 and g33 data...

can small piezoelectric disks 3.7x3.7 cm inside a tube with a buzzer at the other end be able to power an LED

I am in the process of building a piezoelectric device to harvest sound with a frequency generator at one side of a plastic/glass tube which sends out a low frequency which is then picked up by a piezo disk which send the energy to an led which demonstrates hoe sound can be converted to...

With a budget of less than $100, does anyone have an idea on how to make a cheap piezoelectric generator using materials found at home? (aluminum foil, wire, battery, and a silicon swim cap maybe?) I plan to modify this generator to then integrate it inside a bike tire so that whenever I ride...

hello, I have a question about piezoelectric material. In general piezoelectric material is ferroelectric which has spontaneous polarization. The spontaneous polarization should produce depolarization filed in the material leading to some voltage across the electrodes of the material. But I...

Has anyone worked with piezoelectric materials before? Currently starting research work with them and totally new to these materials... I'm currently looking to buy CHEAP *non-toxic* piezoelectric PVDF and ceramics. Goodfellow seems to have PVDF, but paradoxically the website says it's a toxic...

can someone give me detail about piezoelectri buzzer sensor how it works and is it possible of using piezo buzzer sensor in a steam pipe to detect water. Thnak you

piezoelectric ceramics, are they a good substitute for muscles in a robotic limb, and would they make it move in a similar manner to a real limb

Lets say I have a hammer, and a piece of piezoelectric quartz. If I hit the quartz with the hammer with the kinetic energy of 100 joules, how many joules can I get out of the quartz?

Hi people, I am in a project in my university and I need to paste two piezoelectric actuator in a thin circular ring but this ring will stay inside a tank filled with water. Will I have any problem in put this actuator in contact with water? It will be paste in the ring and connected in a...

I'm making a circuit using piezoelectric discs and i wanted to attach solar panels in parallel as well in order to increase amperes of the circuit. However, when put in conjunction the piezoelectric discs seem to have no effect on the circuit, when previously they had been contributing 5 or more...

Lets assume that all properties of a piece of piezoelectrical material are known, how should the analytical calculations be performed if the goal is to convert a vibration into electrical energy? What I'm looking for is the theoretical output voltage one can achieve for a known vibration. To...

I am going to use piezoelectric disks to generate energy from pedestrial movement on footpath please help me which circuit i have to prefer for my project?

Hello, I am working on science fair project in which I am harvesting kinetic energy and converting it into electrical energy to charge an electrical device. However, i would appreciate another opinion on the setup of my circuit. Currently, my setup is as follows: I am using a piezoelectric...

Hello, I'm not an electrical engineering student so please bare with me... anyways if let's say you swallow a pill containing a piezoelectric sensor to measure adsorption of a molecule in the stomach how can you detect the changes in frequency? if there is no "physical" electrical connections...

I'm trying to get a value of the C0 capacitor of some piezoelectric material I'm working with right now. My only problem is: I don't get electronics at all ^^'. So far I have asked some other people who do get it, but there were going way to fast and are really busy...So I was hoping you could...

Hi, I'm researching a potential masters project involving incorporating piezoelectric crystals into a ceramic so that when a load is experienced the electric field generated encourages the electroplastic effect in the bulk phase so that it becomes more plastic and inhibits crack formation...

hi I am doing project on piezoelectric energy harvesting which is a cantilever structure using COMSOL. I have some doubts related to my project. I designed cantilever structure having three layers substrate (SiC), piezo (ZnO) and electrode (Al). My doubt is that when piezoelectric layer...