Apologies if you already know this, but it doesn’t seem to be common knowledge, so this should be of use to some people reading this. G-10 is not a material; it is a spec for electrical and (some) mechanical properties for materials usually used for printed circuit boards. Various
materials meeting these specs are sold as G-10. The actual composition is very vague, so there is no such thing as the “conductivity of G-10” at any temperature. If you know what the actual material you are being sold as meeting the G-10 specs is, then maybe you can look up the thermal conductivity.
Now because G-10 is so useful at cryogenic temperatures, we have G10-CR; this is made with well specified materials and by a well specified process, and the properties are reasonably reproducible.
However, so far as I know, the thermal conductivity of G10-CR has not been measured much above 300 K (it is, after all, designed for cryogenic use).
It does, but the data range is given as 4-300 K, and since the equations are an entirely empirical large order polynomial fit to the data, using them to extrapolate to higher temperatures isn’t likely to be at all useful.
2 Comments
Goran Perinic
June 2, 2011The NIST Cryogenic Technologies Group makes available the equation and
some references here:
http://cryogenics.nist.gov/MPropsMAY/G-10%20CR%20Fiberglass%20Epoxy/G10CRFiberglassEpoxy_rev.htm
Adam Woodcraft
June 2, 2011I would be careful with this!
Apologies if you already know this, but it doesn’t seem to be common knowledge, so this should be of use to some people reading this. G-10 is not a material; it is a spec for electrical and (some) mechanical properties for materials usually used for printed circuit boards. Various
materials meeting these specs are sold as G-10. The actual composition is very vague, so there is no such thing as the “conductivity of G-10” at any temperature. If you know what the actual material you are being sold as meeting the G-10 specs is, then maybe you can look up the thermal conductivity.
Now because G-10 is so useful at cryogenic temperatures, we have G10-CR; this is made with well specified materials and by a well specified process, and the properties are reasonably reproducible.
However, so far as I know, the thermal conductivity of G10-CR has not been measured much above 300 K (it is, after all, designed for cryogenic use).
> the NIST Cryogenic Technologies Group makes available the equation and
> some references here:
>
> http://cryogenics.nist.gov/MPropsMAY/G-10%20CR%20Fiberglass%20Epoxy/G10CRFiberglassEpoxy_rev.htm
>
It does, but the data range is given as 4-300 K, and since the equations are an entirely empirical large order polynomial fit to the data, using them to extrapolate to higher temperatures isn’t likely to be at all useful.