Dielectric Constant Standards of Materials?

[Wayne]

Hi

I have searched the web and found many lists of dielectric constant lists.
However, non of them make ref. to where they acquired the information from.
1/ Can anyone tell me where I can find the dielectric constant tables for
different materials at dif. temps.
2/ What frequency do they use for measuring the dielectric constant value
for example if you look at the chemical datasheet for say IPA it says the
dielectric constant is equal to 18.3 @ 25 degC. However, they do not say
what the frequency is? What is the standard method for measuring dielectric
constants; as it value changes as frequency changes with some materials?


Cheers


Wayne

 

[Watson A.Name - \"Watt Su]

"Wayne" <nospam-mail@wlawson.com> wrote in message news:UZD5d.642$Ue2.549@newsfe6-gui.ntli.net...
Hi

I have searched the web and found many lists of dielectric constant lists.
However, non of them make ref. to where they acquired the information from.
1/ Can anyone tell me where I can find the dielectric constant tables for
different materials at dif. temps.
2/ What frequency do they use for measuring the dielectric constant value
for example if you look at the chemical datasheet for say IPA it says the
dielectric constant is equal to 18.3 @ 25 degC. However, they do not say
what the frequency is? What is the standard method for measuring dielectric
constants; as it value changes as frequency changes with some materials?


Cheers


Wayne


Why does it have to be at a certain frequency? If the measurement is taken by timing the charge or discharge of a capacitor made from the material, then there is no single frequency.

Doesn't the CRC handbook have all that stuff? Physical properties or materials, etc.