Piezoelectric crystals
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Piezoelectric Crystals. MEEN 3344 By: Matthew Kelso. Piezoelectric Crystals. Crystals that generate a voltage when a stress is applied to them. The inverse effect is also true: a voltage causes deformation. This is due to complicated crystal structure that is unsymmetrical about the center.

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Piezoelectric Crystals

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Piezoelectric crystals

Piezoelectric Crystals

MEEN 3344

By: Matthew Kelso


Piezoelectric crystals1

Piezoelectric Crystals

  • Crystals that generate a voltage when a stress is applied to them.

  • The inverse effect is also true: a voltage causes deformation.

  • This is due to complicated crystal structure that is unsymmetrical about the center.


How it works

How It Works

  • In these crystals, the positive and negative charges are separated, but symmetrical.

  • When a stress is applied, the symmetry is disrupted and there is an uneven charge distribution.

  • This uneven distribution generates a voltage across the system.


Types of crystals

Types of Crystals

  • Quartz is the most commonly used crystal.

  • Natural Crystals: Quartz, Rochelle Salt, Topaz, Cane Sugar, Bone

  • Some ceramics

  • Polyvinylidene Fluoride (PVDF)


Applications

Applications

  • Vibration Dampeners

  • Energy farm

  • Quartz Watches

  • Guitar Pickups

  • Lighters

  • Sonar

  • Phonographs

  • Printers


References

References

  • http://www.piezo.com/tech4history.html

  • http://en.wikipedia.org/wiki/Piezoelectricity

  • http://openlearn.open.ac.uk/mod/resource/view.php?id=257278

  • Callister, W.D., Fundamentals of Materials Science and Engineering: An Integrated Approach, 3rd ed. Wiley and Sons, 2008, Online

  • http://www.treehugger.com/files/2006/08/japan_ticket_gates.php

  • http://www.answers.com/topic/piezoelectricity

  • http://www.slashgear.com/gibson-powertune-the-guitar-that-tunes-itself-047793/

  • http://gemscollection.blogspot.com/2007/08/topaz-gemstone.html

  • http://www.handsofhopedisasterreliefservices.org/b2b/confectionery_and_candy/1/

  • http:[email protected]/2182032919

  • http://www.mineralminers.com/images/phantom-quartz/polx/phqp271.jpg

  • http://www.filterforge.com/filters/4802.html

  • http://www.phonodoc.com/phono.htm

  • http://www.global-b2b-network.com/b2b/26/37/858/157887/piezo_igniters.html

  • http://en.wikipedia.org/wiki/Inkjet_printer

  • http://www.explainthatstuff.com/insidequartzwatch.jpg


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