The Engineering Toolbox presents a chart of "common" materials and their thermal conductivity coefficients. I'd read or learned some time ago that diamond was superior in this respect. The chart shows diamond at 1000 W/m K compared to the next closest, silver at 429 W/m K.
My objective is to reduce the grip of a thermal pad between a heated bed and a glass surface. The heat transfer from the bed to the glass was improved by the addition of this thermal transfer pad, but the pad is very sticky, one millimeter thick and relatively fragile. I've only now discovered that this product is discontinued!
Pursuant to this objective is the ability to lift the glass, with the thermal pad (dusted?) remaining on the heater, without the pad adhering to the glass. It's not adhesive, but it sticks with the power of gekko.
I'm considering to powder one surface of the pad, but do not wish to reduce the thermal conductivity. I'm aware that diamond powder exists for lapping/grinding purposes, but have also found that most of the product listings provide the expression "synthetic diamond" in the description.
Even though SE discourages more than one question per post, these are all related to my objective.
Is there a better choice than diamond powder to provide a thermally conductive release mechanism between the thermal gap filler pad and the glass?
Related: Will synthetic diamond powder display the same thermal transfer characteristics?
Edit Added from comments: The bed is a flat electrical heater (3D printer) with a range from ambient to about 100°C. There is normally a 1mm air gap to the glass bed. As such, the air gap has to be heated before the glass reaches the desired temperature. Having installed the 1mm transfer pad reduced the elapsed time involved.