Temperature Dependence of Dielectric Constants

[americanforest]

Does anyone have information on temperature dependence of dielectric constants? I haven't been able to find anything general enough on Google. I'm particularly interested in Polyethylene, Teflon, and Air but a general description would also be appreciated.

 

[olgranpappy]

My favorite book on the topic is "Theory of Dielectrics" by Frohlich. He discusses temperature dependence of the Dielectric function, but I'm not sure about the specific cases you mention. At least you can get started by treating "Air" as an ideal gas.

 

[astrokreng]

The temperature dependence of dielectric constants is a well-studied and documented phenomenon in materials science and electrical engineering. In general, the dielectric constant of a material will decrease as temperature increases. This is because at higher temperatures, the molecules in the material are more energetic and can move more freely, which reduces the overall polarization of the material and therefore its dielectric constant.

Specifically, for the materials you mentioned, Polyethylene and Teflon are both polymers and have similar temperature dependence of dielectric constants. As temperature increases, the dielectric constant decreases due to the increased molecular motion. Air, on the other hand, has a very low dielectric constant that is relatively independent of temperature. This is because air is a gas and its molecules are already highly energetic and mobile at room temperature, so further increases in temperature do not significantly affect its dielectric properties.

If you are looking for more specific information about the temperature dependence of dielectric constants for these materials, I suggest consulting scientific databases such as Web of Science or Scopus, which have a wide range of peer-reviewed research articles on this topic. Additionally, textbooks on materials science or electrical engineering may also provide more detailed information on the subject.