[volt-nuts] Thermal EMF - more results

DM dgminala at mediacombb.net
Sun Jul 3 12:09:54 EDT 2016

Wikipedia cites SN10 PB88 AG02 as having low thermal EMF properties. There are several listings for it on Ebay at the moment. Although not the same as Sn18 solder, it's pretty close. I'd think that the thermal properties would be pretty close as well. 

Dave M 

----- Original Message -----

From: "Andreas Jahn" <Andreas_-_Jahn at t-online.de> 
To: volt-nuts at febo.com 
Sent: Sunday, July 3, 2016 10:14:16 AM 
Subject: Re: [volt-nuts] Thermal EMF - more results 


I do not know exactly how the Seebeck coefficients are "mixed" within a 
Silver and copper have near equal coefficients. 
Sn should be similar to Pb on the same side of Cu. 
On the other side of Cu there are Cd (no longer allowed for ROHS) and Sb 
(Antimony) and Ge (Germanium). 
So I would go for Sb or Ge doped Tin solders if you do not want to have 
100% Ag + Cu 

With best regards 


Am 03.07.2016 um 12:33 schrieb Andrea Baldoni: 
> Hello. 
> I repeated the experiment with a better setup, I also added some alloys 
> that are already arrived. So far, a really "low" EMF solder hasn't been 
> identified. 
> Measurements have been done between water ice point and boiling point with 
> Agilent 34401A. 
> I don't expect the curves be linear, but here it's assumed they are. 
> Copper - Sn96.5/Ag3/Cu0.5 -> 3.35uV/K 
> Copper - Sn95.5/Ag3.8/Cu0.7 -> 3.22uV/K 
> Copper - Sn60/Pb40 -> 3.34uV/K 
> Copper - Pb92.5/Sn5/Ag2.5 -> 3.02uV/K 
> Copper - Brass -> 3.30uV/K 
> I am waiting for Sn96/Ag4, Sn99/Cu1. 
> Best regards, 
> Andrea Baldoni 
and follow the instructions there. 

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