Alt-BEAM Archive
Message #13010
To: beam@sgiblab.sgi.com
From: "Sathe Dilip" beam@sgiblab.sgi.com
Date: Tue, 04 Apr 2000 12:30:08 -0400
Subject: Re: Conductive Epoxy?
TurtleTek@aol.com wrote:
> I have no idea. If it helps any, this epoxy is called
> "Titanium 5 metalic epoxy" It's made by Devcon and is designed to work best
> on metals. It also sets in 5 minutes. It comes in one of those dual plunger
> dispensers. I picked it up at my local hardware store.
That explains it. I was wondering why the epoxy should show such a low
resistivity. You may have measured the resistance between two points 3
mm apart but I suspect depending on the even/uneven-ness of mixing, this
reading could differ at various portions of the mix. This epoxy will
provide resistive links between all components and the overall effect
will be unpredictable. I will advise against using it for potting the
circuitry.
Get some ordinary two part epoxy & use that for potting. If you don't
like the translucent look that it might have, add some filler material
(dry, colored powder of some non conductive material) to the epoxy.
Actually for professional potting compounds (epoxy, polyester, etc) they
sell special coloring additives so that you can have potted modules
color coded.
Dilip
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The early bird may get the worm, but the second mouse gets the cheese.
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13011 Tue, 04 Apr 2000 11:40:59 PDT Complete walker electronics freeform site is finished beam@sgiblab.sgi.com "sebastiaan van Vliet"
Check at www.geocities.com/beamnet
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