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Are permittivities of non-ferroelectric materials dependent of temperature?

  1. Oct 11, 2006 #1
    We know that the permittivities of ferroelectric materials are dependent of temperature because of phase transitions. I want to kown if this is also true in non-ferroelectric materials? If it is true what is the mechanism of it?
     
  2. jcsd
  3. Oct 14, 2006 #2

    Astronuc

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    Staff: Mentor

    Are permittivities of non-ferroelectric materials dependent of temperature?

    Short answer - yes - if one is referring to permittivity and the dielectric constant. Electromagnetic Wave Interaction with Water and Moist Substances Proceeding
    http://www.ars.usda.gov/research/publications/Publications.htm?seq_no_115=177820

    Or is one referring to 'permeability'?

    http://hyperphysics.phy-astr.gsu.edu/Hbase/electric/elefie.html#c3

    See also - http://hyperphysics.phy-astr.gsu.edu/Hbase/solids/magpr.html
     
  4. Oct 14, 2006 #3

    Gokul43201

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    To first order, you would expect a permittivity to be dependent on density, which is related to temperature through the the thermal expansion coefficient.

    But that's not all there is to it: look up the "thermo-optic effect".
     
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