[time-nuts] temperature stability basics

[jimlux]

Poul-Henning Kamp wrote:
> In message <05fb5f7f819d035fdc8556f9b4842b98.squirrel at webmail.sonic.net>, "Rick
>  Karlquist" writes:
> 
>> The general consensus was that
>> all foams were more or less similar thermally, 
> 
> There is indeed very little difference, in particular if the foam
> is encapsulated so the open/closed bubble difference is eliminated.
> 
> These days aerogel is the big thing, and Aspen Aerogel's "spaceloft"
> series of products are seeing a lot of use in tight spaces.
> 
> It is also possible to buy aerogel as granulate, for instance from
> United Nuclear, but be aware that it will draw moisture like there
> is no water tomorrow, so always use gloves and a respiratory filter.
> 
> I'm not sure the mechanical strength of aerogel would be any use
> for military OCXO's[1], but for lab-settings, it would work fine.
> 

We use aerogel for insulation in Mars rovers..  Those little RHUs don't 
put out a lot of heat, and you don't have much electronics on at night.