[time-nuts] OXCO insulation

DaveH info at blackmountainforge.com
Wed Feb 25 02:09:15 UTC 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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