Dave,

We actually put in a piece of lead. The peak for lead is slightly offset from where we find the peak.



Doctors Turbini and Koo came by with a couple of suggestions:

Turbini - some Bi compounds used as catalysts for polymerization

Koo - Bi amine halides used as flame retardants 



Great when I have staff like this! Should have gone to them first before TechNet, but at least we all learn this way. :)

Bev

RIM



________________________________



From: [log in to unmask] 

To: TechNet E-Mail Forum ; Bev Christian 

Cc: [log in to unmask] 

Sent: Thu Feb 26 12:23:37 2009

Subject: Re: [TN] Weird one - bismuth in overmold 







Hi Bev - hey, Bismuth and Lead shell lines overlap each other in the 0-10kV range but are distinctly separate in the 10-20kV range. Which range did you use? Could you have a case of mistaken identity? 



Dave Hillman 

Rockwell Collins 

[log in to unmask] 









Bev Christian <[log in to unmask]> 

Sent by: TechNet <[log in to unmask]> 



02/26/2009 09:51 AM 

Please respond to

TechNet E-Mail Forum <[log in to unmask]>; Please respond to

Bev Christian <[log in to unmask]>



To

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cc

Subject

[TN] Weird one - bismuth in overmold



	









TechNetters,

In checking a component for one thing or another we found via SEM/EDX

particles of bismuth in the overmold.  Smaller amounts of bromine were

also found in the same spots but the largest signal by far was due to

Bi.  I have never seen or heard of such a thing before.  Can anyone shed

any light on this before I go to the component vendor?

Bev

RIM



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