[time-nuts] temperature stability basics

[J. Forster]

You could probably buy enough pink fiberglass to insulate a house for what
one of those cost. They might even cost more on eBay

-John

===============


> How about surplus HRSI tiles off the Shuttle?
>
>
>
> On Sat, Nov 27, 2010 at 1:47 PM, Poul-Henning Kamp
> <phk at phk.freebsd.dk>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.
>>
>> Poul-Henning
>>
>> [1] People tend to forget that aerogel is one of the strongest
>> materials *relative to its weight*, and at the same time the
>> solid with the lowest density.  The first thing people do on
>> picking up a piece of aerogel is typically to crush it.
>>
>> --
>> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
>> phk at FreeBSD.ORG         | TCP/IP since RFC 956
>> FreeBSD committer       | BSD since 4.3-tahoe
>> Never attribute to malice what can adequately be explained by
>> incompetence.
>>
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