[time-nuts] OCXO housings - Why copper and not iron/steel?

[Luiz Alberto Saba]

Interesting list

https://thermtest.com/thermal-resources/top-10-thermally-conductive-materials

Enviado do meu iPhone

> Em 30 de out. de 2020, à(s) 23:57, Bruce Griffiths <bruce.griffiths at xtra.co.nz> escreveu:
> 
> Not true 
> The Wiedemann-Franz gives the ratio of the thermal conductivity to electrical conductivity of a metal:
> ( pi^2 / 3 ) * ( (k/e)^2 ) * T
> 
> Bruce
>> On 31 October 2020 at 12:49 "Dr. David Kirkby" <drkirkby at kirkbymicrowave.co.uk> wrote:
>> 
>> 
>>> On Fri, 30 Oct 2020 at 22:17, Luiz Alberto Saba <las at intercat.com.br> wrote:
>>> 
>>> My bad... copper is the second, losing only to silver, as a thermal
>>> conductor.
>>> 
>> 
>> I think you are mistaken.  Copper is second to silver for *electrical*
>> conductivity, but I doubt that is so for thermal conductivity. I think
>> diamond, which is a form of carbon, is the best thermal conductor, and
>> around 5x better than copper.
>> 
>> Dave
>> 
>> -- 
>> Dr. David Kirkby,
>> Kirkby Microwave Ltd,
>> drkirkby at kirkbymicrowave.co.uk
>> https://www.kirkbymicrowave.co.uk/
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>> 
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