On Tue, 5 Mar 2019 08:22:00 -0000 (UTC), gregz
wrote:

What about the conducting stuff they use for CPUs
on motherboards?

My experience shows it dries up. Sure is messy.
Greg

Are you talking about "liquid metal" (gallium-indium) thermal paste?
https://www.thermal-grizzly.com/en/products/26-conductonaut-en
The paste offers an improvement in thermal conductivity, but with some
issues. It rots aluminum heat sinks. It tends to run and drip when
hot, shorting out everything it touches. It's difficult to clean up.
It's expensive. I haven't tried liquid metal, but have cleaned up a
motherboard and video card where the customer applied some.

W/m*K
Diamond 1000
c-BN 740 (Cubic Boron Nitride)
h-BN 600 (Hexagonal Boron Nitride)
Silver 406
Copper 385
Gold 314
AlN 285 (aluminum nitride ceramic)
Aluminum 205
Graphite 200
Carbon 150
SiC 120
Brass 109
Indium 86
Liquid Metal 73 (Indium-gallium-tin)
ZnO 50 (zinc oxide)
Al2O3 25 (aluminum oxide ceramic)
Pastes 4.0
SilPad 2000 3.5
Circuit Works 1.84
Dow Corning 340 0.67

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Jeff Liebermann
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Santa Cruz CA 95060 http://802.11junk.com
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