Try polyimide foam. Rated to 300 c. http://www.professionalplastics.com/POLYIMIDEFOAM
hld Howard L. Davidson [email protected] >________________________________ > From: Dave M <[email protected]> >To: [email protected]; Discussion of precise time and frequency >measurement <[email protected]> >Sent: Tuesday, February 24, 2015 4:32 PM >Subject: Re: [time-nuts] OXCO insulation > > >Ok, there has been a couple replies suggesting aerogel. I've read a bit >about it, and understand that it's extremely light and effective, but quite >difficult for a hobbyist to make. Also, probably very expensive. Is there >a source for very small quantities of it? Is is flexible enough to wrap >around a cubical or cylindrical object without destroying it? >I've considered fiberglass as a cheap, available insulation, and will >probably be what I use to repair my oscillators. > >I'm very leery of trying to use Great Stuff household foam insulation. I >just don't want to risk having another failure because of it. > >Cheers, >Dave M > > >Brian Inglis wrote: >> On 2015-02-22 17:42, Charles Steinmetz wrote: >>> Brian wrote: >>> >>>> Thought of trying aerogel insulation? >>>> Dust free varieties avoid handling issues. >>> >>> Be careful not to over-insulate the oven -- it depends on a certain >>> amount of heat flow to ambient to balance the heater. The stability >>> of the heater control loop depends on having the correct amount of >>> thermal resistance from oven to ambient (also, on the thermal >>> resistance being distributed similarly to the original scheme). >> >> R-value for commercial aerogel insulation is about double rigid >> polyurethane insulation, so half the thickness would be about right. > > >_______________________________________________ >time-nuts mailing list -- [email protected] >To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >and follow the instructions there. > > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
