[volt-nuts] Oven thermal insulation

[Randy Evans]

I am working on a voltage reference deisgn that will go into an oven for
the highest stability.  I am looking for a good insulation material that
can stand high temperatures safely (up to 80C).  Looking at some HP
frequency standard ovens I see a hard, light-weight insulation material of
some type that looks like it would work really well, but I have no idea
what it is.  Does anyone have any suggestions?

Thanks,

Randy Evans AE6YG