In message <05fb5f7f819d035fdc8556f9b4842b98.squir...@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 p...@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. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.