Antimony concentration vs. conductivity of silver
Does anyone know the correlation between Antimony concentration in silver deposit and conductivity of silver?
chemical process supplier
Some background: Lowenheim's Electroplating textbook, page 261, says, unquote:... antimony has been recommended as a hardener for silver deposits... Antimony will harden silver deposits... , quote: "but there is considerable disagreement about whether hardness and wear resistance necessarily go together", unquote.
I'll bet a coffee that the small amounts of antimony probably needed for hardening will be undetectable in conductivity measurements.
Make the bet a beer and I'll double it, Tom. Although I couldn't quickly find a chart with the conductivity of silver vs. antimony concentration, a quick look through conductivity tables for other metals showed that even a very minor amount of alloying material drastically cuts down on conductivity (probably because the crystal lattice dislocations disrupt the travel of the electron 'cloud').
But the conductivity of a solid material like a silver wire and the surface resistance of silver plating are different things. It's possible that the antimony has no effect or even a positive effect on the contact resistance of a silver plated connection.
Ted Mooney, P.E. RET
Pine Beach, New Jersey
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