Quartz Dielectric in Capacitors: What Happens?

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    Dielectric Quartz
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Discussion Overview

The discussion revolves around the properties of quartz as a dielectric material in capacitors, particularly its behavior when subjected to electric fields and mechanical stress. Participants explore the implications of using quartz in capacitor designs, its piezoelectric characteristics, and the potential effects of applying voltage and pressure to the material.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose that quartz has dielectric properties and question why it is not commonly used in capacitors.
  • Others discuss the piezoelectric nature of quartz, suggesting that applying a voltage could cause the crystal to deform and generate measurable charge.
  • There is curiosity about whether the voltage generated by the quartz would be proportional to the power supplied by the battery when the plates of the capacitor are connected.
  • Participants express interest in the behavior of quartz after being deformed and whether it returns to its original shape under continued pressure.
  • A participant provides links to resources that include tables of dielectric properties and examples of specialty capacitors that utilize quartz.

Areas of Agreement / Disagreement

Participants generally agree that quartz has dielectric and piezoelectric properties, but there is no consensus on its practical applications in capacitors or the specifics of its behavior under electrical and mechanical stress.

Contextual Notes

The discussion includes assumptions about the behavior of materials under electrical fields and mechanical stress, which may depend on specific conditions not fully explored in the posts.

Who May Find This Useful

Readers interested in materials science, electrical engineering, and the applications of piezoelectric materials in capacitors may find this discussion relevant.

Salvador
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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.
 
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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?
 
anyone interested in sharing something about the topic? :)
 
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
 

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