thermal grease

Just wondering if anyone has thought about making there own high temp thermal conductive grease.

malcom st. peter wrote:Just wondering if anyone has thought about making there own high temp thermal conductive grease.

Hexagonal boron nitride.
(Sometimes called white graphite)
http://en.wikipedia.org/wiki/Boron_nitride

Can be mixed with high-temperature grease.

If this is to expensive for you,
then you may look at scientific papers about increasing thermal conductivity in polymers,
there are a lot on the net.
The principles can be used for grease too.

I found this http://www.superior-industries.com/dsf_5000_product_122.html. I was thinking of mixing it with copper powder, then packing it into a drum of sorts with copper tubing. I am thinking that this would make for greater surface aria for heat transfer.

malcom st. peter wrote:I found this http://www.superior-industries.com/dsf_5000_product_122.html.

Quite expensive stuff.

I was thinking of mixing it with copper powder, then packing it into a drum of sorts with copper tubing. I am thinking that this would make for greater surface aria for heat transfer.

It is not as simple as you may think.
One needs at least three sieve lines of the particles one wants to use in very precise ratios of size and weight
to get high thermal conductivity.

In this respect oil would do a far better job than grease, as one can put a lot more fine solids in a liquid with lower viscosity.
Even more if one heats it up before mixing.

You could try to get fin tubes for heat exchangers, which provide a lot more surface than standard tubes.