Ah, that email left the gate before it was ready. Indium still does make Cd bearing solders, just not pastes.
Andy Bardagjy bardagjy.com On Thu, May 30, 2013 at 12:51 PM, Andy Bardagjy <a...@bardagjy.com> wrote: > A few months ago I send Indium an email inquiring about low thermal EMF > solders. A good choice is Sn10Pb90, or Indalloy 159. > > Andy Bardagjy > bardagjy.com > > > On Thu, May 30, 2013 at 5:05 AM, Andreas Jahn > <andreas_-_j...@t-online.de>wrote: > >> >> Hello >> >> >> I do not imagine cadmium bearing solder being easy to acquire. The >>> Wikipedia entry for solder says Pb90Sn10 can be used as a replacement >>> for Cd70Sn30 in low thermal EMF applications: >>> >>> http://en.wikipedia.org/wiki/**Solder<http://en.wikipedia.org/wiki/Solder> >>> >>> On Thu, 30 May 2013 04:00:19 +0200, Volker Esper <ail...@t-online.de> >>> wrote: >>> >>> >>>> By the way: does anyone know, if Agilent uses special solder alloy? I've >>>> heard that a cadmium containing solder is used to get extremely low >>>> thermoelectric voltages (or voltage differences). >>>> >>>> Is that right? If so, which alloy has to be used? >>>> >>>> Thanks >>>> >>>> Volker >>>> >>>> >> Within LT AN86 Cd60Sn40 is recommended for a limited temperature range of >> 0 to around 40 degrees. >> http://cds.linear.com/docs/en/**application-note/an86f.pdf<http://cds.linear.com/docs/en/application-note/an86f.pdf> >> >> But: the thermal EMF is only zero against copper. >> Most precision integrated (hermetical) cirquits use Kovar. (39uV/K >> against copper) >> Relay contacts will be either copper berillium or another material. >> So in most cases a optimized solder for copper/copper connections will >> not be useful. >> >> On the other side Cd containing solders create very poisonous damps when >> being heated. >> >> With best regards >> >> Andreas >> >> >> >> ______________________________**_________________ >> volt-nuts mailing list -- volt-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/** >> mailman/listinfo/volt-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts> >> and follow the instructions there. >> > > _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
