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Thread: Best thermal insulator

  1. #1 Best thermal insulator 
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    What is the best thermal insulator (regardless of how redicuously expensive it is)? what is better than fibreglass, foam or the gold insulator they cover satellites in?

    thx


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  3. #2  
    Forum Masters Degree bit4bit's Avatar
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    Silica and aerogel are the best as far as I know, they're used on the space shuttle to protect against re-entry temperatures.


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    Forum Junior Zitterbewegung's Avatar
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    I've got to second bit4 on this one. Ridiculously expensive and shitty mechanical properties but the best I've seen so far when it comes to thermal insulation.
    I love deadlines. I like the whooshing sound they make as they fly by
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    Forum Professor sunshinewarrior's Avatar
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    And, of course, technically speaking a vacuum is the best insulator - avoiding conduction and convection transference of heat (hence, of course, the vacuum flask).

    But it would almost certainly be not just ridiculously expensive for a spacecraft, but perhaps just plain ridiculous... (or maybe silvered spaceships are the future?)
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  6. #5  
    Forum Masters Degree bit4bit's Avatar
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    Yeh, in the vacuum of space, you don't have to worry about thermal conduction, only thermal radiation, so the gold/silvered foil they use for satellites is enough to insulate from the radiation. No chance of re-entry though.
    Chance favours the prepared mind.
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