Diamond, graphite and graphene are all forms of the
element carbon. They all can have more conductivity
than silver.
Rick N6RK
On 10/30/2020 3:25 PM, Andy Talbot wrote:
Actually, diamond has five times better thermal conductivity than silver,
so is the most conductive element, although graphene is suspected to be
better still.
Andy
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On Fri, 30 Oct 2020 at 22:17, Luiz Alberto Saba <[email protected]> wrote:
My bad... copper is the second, losing only to silver, as a thermal
conductor.
Enviado do meu iPhone
Em 30 de out. de 2020, à(s) 19:06, Luiz Alberto Saba <
[email protected]> escreveu:
If my memory serves me, copper has the better conductivity of all the
periodic table...
Enviado do meu iPhone
Em 30 de out. de 2020, à(s) 18:56, Attila Kinali <[email protected]>
escreveu:
Moin,
I have been looking at heat capacities of different materials
lately. One thing that struk me odd is, that the volumetric
heat capacity of copper, which is the thing that most people
use when building something that needs to have high heat capacity
to get stable temperature, has only a volumetric heat capacity
of 3.45 J/(cm^3·K). Meanwhile, the much cheaper iron has
a volumetric heat capacity of 3.53 J/(cm^3·K) and steel
even 3.75 J/(cm^3·K).
In an OCXO, which is generally size limited, getting the most
heat capacity in the limited volume would be the main goal,
wouldn't it? Also optimizing for price would be a major thing.
I can understand that iron is probably not the right choice
due to its tendency to oxidize. But using a soft (annealed) steel
would be easy to machine, cheaper per piece and give almost 10%
higher heat capacity in the same volume.
So why do people choose copper instead of steel?
Attila Kinali
PS: Fun fact: Water has a volumetric heat capacity of 4.18 J/(cm^3·K)
at 25°C. We should fill OCXOs with water! :-D
--
<JaberWorky> The bad part of Zurich is where the degenerates
throw DARK chocolate at you.
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