[time-nuts] OXCO insulation
DaveH
info at blackmountainforge.com
Tue Feb 24 21:09:15 EST 2015
This looks interesting:
http://www.buyaerogel.com/product/spaceloft/
The whole site has aerogel products for reasonable prices. Note the caution
for spaceloft:
Note: Product is dusty; gloves, eye protection, and dust mask
recommended for handling.
Dave
> -----Original Message-----
> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf
> Of Dave M
> Sent: Tuesday, February 24, 2015 16:32
> To: Brian.Inglis at SystematicSw.ab.ca; Discussion of precise
> time and frequency measurement
> 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.
>
>
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