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24 views

To build a gravitoelectric generator

Listening to Dr. Feynman one of the things he states is that the planets are orbs because, even if they started out as squares, Gravitational attraction will crunch the corners and the rest into an ...
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16 views

Deformation of piezoelectrics

I am having difficulty finding a good explanation of how potential difference and deformation of a piezoelectric relate. Is there a fixed axis along which the piezoelectric crystal will respond to ...
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1answer
60 views

Vortex shedding

So I was reading about vortex shedding, and got to know that it causes the building to resonate. Is there any way to use this resonance to generate electricity (maybe use quartz?) I am trying to make ...
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1answer
23 views

Using piezoelectiricty to produce electricity

What if piezoelectric materials could be placed under a runway to then produce electricity to power (street) lights - I don't know what voltage certain piezoelectric compounds can produce, but would ...
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1answer
27 views

Anyone know of a piezoelectric polymer that reacts to light or electron bombardment?

In other words, a very small amount of light would make it rapidly expand 1/2 mm or more-- (1/1000th candlepower)--or the amount of electrons that a standard (non-lcd) TV monitor shoots at one pixel? ...
3
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1answer
98 views

Is it possible to levitate an object with piezoelectricity?

The delay for transmit pressure depend of speed of sound in the material. A lot of piezo slip-stick actuator can generate an asymetric wave. Like the differential pressure is not the same the force to ...
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70 views

Good book dealing with voltage output of piezoelectric buzzers

I'm wondering if someone can steer me in the direction of a good book that deals with piezoelectric buzzers, and explains why the output voltage is so much higher than for a regular piezoelectric ...
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0answers
42 views

pressure required for displacing a single electron off a crystal

I need to know this for my project- "power generation using the pressure applied on a keypad of a mobile electronic device". How much pressure does it take to displace a single electron off its ...
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1answer
100 views

Piezoelectricity in GaAs

I am studying the piezoelectricity in Gallium arsenide (GaAs), $[110]$ and $[\bar{1}10]$ oriented. Piezoelectricity is usually described microscopically by a 3 index tensor, $d_{ijk}$ where i,j and k ...
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1answer
41 views

Looking for a reference book, or book chapter to learn about piezoelectricity

I'm looking for an introduction to the treatment of piezoelectricity, specially in semiconductors emphasizing the dependence on the orientation of the unit cell and the interactive effects with the ...
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216 views

What happens when a piezo crystal is exposed to a vacuum?

Application of mechanical stress to a piezo crystal generates a charge. Quoting from wikipedia, a 1 cm3 cube of quartz with 2 kN (500 lbf) of correctly applied force can produce a voltage of 12500 ...