Are permittivities of non-ferroelectric materials dependent of temperature?

[Silicon]

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?

 

[Astronuc]

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

 

[Gokul43201]

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".