[TCML] Rotary Disc Material

[Andrew Robinson <teslamad@xxxxxxx>]

Check out this image of my old SRSG:

http://host.atomiklan.com/tesla/UHMW.jpg

The disc used UHMWPE (Ultra high molecular weight polyethylene) as its 
base plastic. Ignoring the burned areas, what im really concerned about 
is the melting... I know all this looks bad, bear with with me a min.
(Side note: UHMWPE has a melting point around 144 to 152 degrees C)_ 
<http://en.wikipedia.org/wiki/Celsius>_
This gap ran a 10KVA pig driven coil hence the crazyness. Those steel 
electrodes got so hot that they melted into the plastic. The washers 
that used to be there are now completely gone... vanished... MIA. lol
Anywaz, the new gap is going to use tungsten electrodes that space out 
farther from the disc to prevent the burning , the the new electrode 
material should help with the heating up problem, but as an extra 
measure, im looking for a new material to machine the disc out of. I've 
seen alot of people out there that made the disc out of what looks like 
a brown brittle material. What can I use that will chock it up to the 
heat and be an excellent insulator?
Thanks,
Andrew Robinson
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