Re: Dielectric Constant Standards of Materials?

From: Wayne (nospam-mail_at_wlawson.com)
Date: 09/26/04 

Date: Sun, 26 Sep 2004 18:35:32 GMT

Is there a standard body that list them such a NIST (although I can not find
anything on NIST)?

Cheers

Wayne

"Spehro Pefhany" <speffSNIP@interlogDOTyou.knowwhat> wrote in message
news:hs0el0h7dlkfoc6ucqbjnud30lrc4528fo@4ax.com...
> On Sun, 26 Sep 2004 17:12:00 GMT, the renowned "Wayne"
> <nospam-mail@wlawson.com> wrote:
>
>>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 data*** 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
>
>
> Yes, my Reference Data For Radio Engineers lists dielectric constant
> at various frequencies from 60Hz to 25GHz. My CRC Handbook refers to
> the values as "limiting values at low frequencies", and points you to
> NBS Circular 514. They give the values at 20 and 25°C and give the
> nominal tempco in the vicinity of room temperature. Internet sources
> often omit references and other pertinent data that you'll find in
> printed reference books.
>
>
> Best regards,
> Spehro Pefhany
> --
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