[sdiy] Epoxy, good heat container?

[Bob Weigel]

I've used a specialized thermal epoxe in the past also.  So obviously 
all epoxe is not created equally .

John Luciani wrote:

>On Sat, Feb 23, 2008 at 6:29 PM, karl dalen <dalenkarl at yahoo.se> wrote:
>  
>
>>Does epoxy spread and maintain distributed heat well?
>>
>>    
>>
>
>Some epoxies do. One of the reasons that some power semiconductors and
>power supplies
>are encapsulated in epoxy is to increase the thermal conductivity. A
>couple of epoxy
>vendors that come to mind are Epoxy Technologies and Castall.
>
>There is also a thermally conductive type of rubber encapsulant that
>is less rigid than
>the epoxy.
>
>If you are going to encapsulate your circuits in a rigid material you
>need to be careful
>that the thermal expansion and contraction doesn't destroy component
>packages (e.g. glass diodes)
>or damage the solder connections (like shearing SMD components).
>
>(* jcl *)
>
>  
>