~3.3E-2 W/mK.
If, as I suspect, its transparent to 10-20um infrared then adding
intermediate aluminium foil radiation shields may be useful.
Some styrofoam insulating panels include carbon black to inhibit
infrared transmission:
http://www.glasscellisofab.com/sheets/polystyrene/data_sheets/STYROFOAM%20PANELMATE.pdf
Foam glass is also black for the same reason and its cells are filled
with sulphur dioxide (at least it smalls like that when you cut it).
Aerogel foam is also good (not sure about its infrared transparency).
Bruce
Brooke Clarke wrote:
Hi Mathew:
There are a bunch of them, but I like the DS3231 because it has a
software frequency tweak and I2C interface.
http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4627/t/al
http://datasheets.maxim-ic.com/en/ds/DS3231.pdf
Hi Bruce:
Do you have a value for the thermal resistance of Styrofoam?
Have Fun,
Brooke Clarke
http://www.PRC68.com
Matthew Smith wrote:
Quoth Brooke Clarke at 10/03/10 10:22...
...like a Dallas 32khz, or one of the newer Maxim units...
There's a Maxim part to supersede the DS32kHz? I know that my
regular vendors [Farnell, Soanar, Futurlec] in Australia don't stock
the DS32kHz, which makes them mega-expensive to acquire.
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