Re: Thermal Insulation Materials

12000 rpm will place the insulating rings under substantial tensile
stress.

It will greatly ease your problems if the insulating rings can be
placed inside steel(or other high tensile strength) hoops at the
outside edge of the disk. This will put the insulation in compression
rather than in tension & simplify everything. Such a hoop should have
little or no effect on convective heat loss and if polished will
decrease radiation heat loss.

The metallic tensile hoop should not contact the steel disk directly to
avoid that heat flow path. Can you cast an insulating refractory ring
in place on the disk's edge such that the ring is a larger outside
diameter than the disk? That would thermally decouple the hoop from the
disk.

Or perhaps a stainless wire surrounding each of top & bottom rings?

Dave

.

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