Article View: sci.materials
Article #62Re: Insulator with good heat conductivity
From: Stan Bischof
Date: Wed, 29 Jul 1992 15:05
Date: Wed, 29 Jul 1992 15:05
29 lines
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1574 bytes
In sci.materials, whit@milton.u.washington.edu (John Whitmore) writes:
Sorry, but I have to disagree with two of your points:
> If your electricity is in superconductors, 'insulator' is a fair
>description of copper...
Copper is an excellent conductor at cryogenic temps, by any definition.
Please no pedantic drivel like ' compared to ZERO resistivity, anything
is infinitely less conductive and hence an insulator'.
>but 113W/cm/K at helium temperature. Except for diamond, your
>best bet is BeO (highly toxic, by the way!) but the only data I have
^^^^^^^^^^^^^^^^^^^^
Nonsense. This is pure urban legend. You could eat BeO on your breakfast
cereal and have no problems.
The only problems with BeO come in when you powder it very finely and
inhale it into your lungs. The small particles cause some nasty reactions
similar to what happens with inhaled asbestos. Basically a mechanical
irritation.
Stan Bischof
SRSD
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Merely my own opinions, in no way related to the
opinions of my employer, Hewlett-Packard
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Path: arc1-ca.pugleaf.net!sparky!uunet!usc!rpi!gatech!usenet.ins.cwru.edu!agate!ucbvax!hplabs!hplextra!hpl-opus!hpnmdla!stanb From: stanb@hpnmdla.sr.hp.com (Stan Bischof) Newsgroups: sci.materials Subject: Re: Insulator with good heat conductivity Message-ID: <17760004@hpnmdla.sr.hp.com> Date: 29 Jul 92 15:05:03 GMT References: <7926@dirac.physics.purdue.edu> Organization: Hewlett-Packard, Santa Rosa, CA Lines: 29