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Any type of material that expands with electricity?

  1. Oct 1, 2012 #1
    Is there any type of liquid or solid, or any material that will expand with the addition of electricity, or vice versa?
     
  2. jcsd
  3. Oct 1, 2012 #2

    berkeman

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    Staff: Mentor

  4. Oct 1, 2012 #3
    piezoelectric materials. even quartz has this property and its used in crystal oscillators for electronic applications.
     
  5. Oct 1, 2012 #4
    I have read about the smart metals but I was looking for something that does not need to be heated.

    and for the quartz how much does it actually expand when the current is applied?
     
  6. Oct 1, 2012 #5

    berkeman

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    Staff: Mentor

    Not much: http://en.wikipedia.org/wiki/Piezoelectricity#Actuators

    If you want some real expansion/displacement, how about using a magnet and a coil? That is how speakers turn electric current into displacement...
     
  7. Oct 1, 2012 #6
    Yea but I was really looking for some type of liquid.

    Know of any?
     
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