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Piezoelectric Crystals

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Title: Piezoelectric Crystals


1
Piezoelectric Crystals
  • MEEN 3344
  • By Matthew Kelso

2
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.

3
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.

4
Types of Crystals
  • Quartz is the most commonly used crystal.
  • Natural Crystals Quartz, Rochelle Salt, Topaz,
    Cane Sugar, Bone
  • Some ceramics
  • Polyvinylidene Fluoride (PVDF)

5
Applications
  • Vibration Dampeners
  • Energy farm
  • Quartz Watches
  • Guitar Pickups
  • Lighters
  • Sonar
  • Phonographs
  • Printers

6
References
  • http//www.piezo.com/tech4history.html
  • http//en.wikipedia.org/wiki/Piezoelectricity
  • http//openlearn.open.ac.uk/mod/resource/view.php?
    id257278
  • 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_tick
    et_gates.php
  • http//www.answers.com/topic/piezoelectricity
  • http//www.slashgear.com/gibson-powertune-the-guit
    ar-that-tunes-itself-047793/
  • http//gemscollection.blogspot.com/2007/08/topaz-g
    emstone.html
  • http//www.handsofhopedisasterreliefservices.org/b
    2b/confectionery_and_candy/1/
  • http//flickr.com/photos/14833125_at_N02/2182032919
  • 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/26/37/858/15
    7887/piezo_igniters.html
  • http//en.wikipedia.org/wiki/Inkjet_printer
  • http//www.explainthatstuff.com/insidequartzwatch.
    jpg
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