My feeling is that copper would tend to hold the heat, for example a copper clad bottom on a pot or skillet. I'm pretty certain that aluminum cooling fins are the most efficient, although aluminum car radiators aren't very good while car radiators with copper fins are common and easy to repair.
Actually, I read somewhere (my physics book? not sure) that copper, aluminum, silver, and gold were all good conductors of heat, but the order of best to worst is: silver, copper, gold, aluminum. The idea is, if it's a better conductor of heat, then when it's used as a heat sink, the heat will away from the chip to it. where it can be cooled by the air (That's why
heat sinks are in fins i think).
Anyway, i'm certainly no expert, and could probably be wrong. Maybe one of the other people on the list that are, could verify what i'm saying.
--Ray
