This claims 34 w/mK, about 10x better than most stuff. It costs from about $3 to $15 per square inch, which limits use.
Interesting, John. According to this
most "non exotic" thermal pads seem to be in the 1 to 7 range.
= RS
My favorite insulator is aluminum nitride, which conducts heat almost as well as most aluminum alloys, around 150 w/mk.
I had a batch of custom AlN things made for my 1200-volt Pockels Cell driver, for around $1 each.
Not useless, it's an excellent heat spreader. Is the across plane conduction so poor that heat can't get into the spreader, I doubt it. Once the heat is in the sheet it spreads over a large area and a low cross plane conduction is mitigated by the large area.
Looked for voltage information but didn't see any spec.
I think we use some Laird materials.
boB
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