Quote Originally Posted by SoF View Post
3rd: Indium foil? Doesn't sound common to me - any more info about these things? I just know "liquid metal paste" some time ago in germany, but is it the same?
Indium: http://en.wikipedia.org/wiki/Indium

Very rare soft metal. The foil is 99,9% pure indium, so there is practically no heat recistance.

Thermal conductivity comparison:
OCZ Freeze = 3.8 W/m-K
Titan Nano = 4.5 W/m-K
Indium metal (+foil) = 81.8 W/m-K

Liquid metal pastes are Gallium + Indium combination, where gallium is the main part. Gallium is slightly toxic and it does expand when it is getting colder. So it can not be used with ln2.