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- From: stanb@hpnmdla.sr.hp.com (Stan Bischof)
- Date: Thu, 30 Jul 1992 14:41:12 GMT
- Subject: Re: Insulator with good heat conductivity
- Message-ID: <17760005@hpnmdla.sr.hp.com>
- Organization: Hewlett-Packard, Santa Rosa, CA
- Path: sparky!uunet!paladin.american.edu!darwin.sura.net!zaphod.mps.ohio-state.edu!rpi!usc!sdd.hp.com!hplabs!hplextra!hpl-opus!hpnmdla!stanb
- Newsgroups: sci.materials
- References: <7926@dirac.physics.purdue.edu>
- Lines: 37
-
- In sci.materials, whit@milton.u.washington.edu (John Whitmore) writes:
-
-
- >>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.
-
- > Are you certain of that? My trusty TLV-TWA table shows acceptable
- >dust levels of arsenic at 0.5 mg/m^3, and of beryllium at 0.002 mg/m^3;
- >beryllium is a very toxic light-metal poison, and I always thought
- >the oxide was just as toxic.
-
- > John Whitmore
-
- Yep. Only problem with BeO is in very fine powders. Which means you
- definitely DON'T want to inhale the stuff- can cause death in extreme
- cases, ,cancer in some, etc.
-
- Perfectly safe handled properly though. WON'T turn you into the
- 'toxic avenger' if you touch it. Just be careful about any usage
- which would abrade it- sawing, laser trim, etc. need to be done
- under well controlled conditions.
-
- I'm sure that any vendor who would sell you the stuff would have
- handling advisories.
-
- In any case, in answer to the original question- anodized aluminum
- would be my best recommendation.
-
- Stan Bischof
- HP-SRSD
-
- *************************************************
- Merely my own opinions and in no way related to
- those of my employer- Hewlett Packard.
- *************************************************
-