Quartz Dielectric in Capacitors: What Happens?

[Salvador]

Hi everyone.

I have been reading on capacitors and dielectrics , before that i was reading up on piezoelectric materials like quartz crystal.

My question is , what would happen if we put a layer of quartz crystal between two parallel plates of a capacitor ?
I think quartz is a dielectric to a degree , as a piezoelectric material would it gain charge as the plates would push on the layer of crystal ?What would happen , I'm interested to know.

Thx.

 

[Salvador]

I'm getting no replies , I'll try to ask diferently.

I read that a quartz produces charge when squezed.what would happen when i take two plates A and B with a quartz between them , connect them to battery , since + and - attract the plates would squeeze the quartz , would there be a voltage on the sides of the quartz and would it be proportional to the power from the battery ?

I'm also interested to what happens when a quartz that ahs been squezed is drained of its produced charge , does it shapes back to its original form , even with the external pressure still applied to it?

 

[Salvador]

anyone interested in sharing something about the topic? :)

 

[Bobbywhy]

Piezeoelectricity

Hi Salvador!

Quartz has dielectric properties. You can look them up. Have you ever heard of or seen a capacitor made with quartz for its dielectric? I have not. There ought to be some reason and or explanation why there not used or not common.

Quartz crystal is piezeoelectric. You can look that up, starting with Wikipedia. Yes, if you connect a battery across a quartz crystal it will cause the crystal to deform (bend a little bit). The reverse is also true: if you bend (deform) the crystal it will become charged (polarized) and will generate some DC voltage measureable from one side to the other. When you release the applied force, the crystal tries to go back to its "original" (unperturbed) position. This may result in overshoot: the crystal has a natural resonant frequency at which it will vibrate (resonate). These quartz crystals are typically used in clocks to generate accurate time/frequency signals.

Do some research on your own. If you have any more questions, please return here and post them. Members here are always ready and willing to help a true searcher.

Bobbywhy

 

[UltrafastPED]

Here is a table, including quartz, with detailed introductory notes:
http://www.kayelaby.npl.co.uk/general_physics/2_6/2_6_5.html

And here are some specialty capacitors with quartz:
http://www.voltronics.ru/Products/trimmer-capacitors/pdf/glass_quartz_genspecs.pdf