Metal, Temperature and Resistance
Name: Roland B.
Is there a metal (alloy) that has a non-linear
temperature coefficient in its electrical conductivity i.e. at elevated
temperatures has significantly higher resistance?
I think there are. Please look up electrical resistivity of metals and
alloys in the set of references by Tolukian (I think they are called "Hand
book of thermophysical properties." This should be available at major
engineering school libraries.
Ali Khounsary, Ph.D.
Advanced Photon Source
Argonne National Laboratory
The electrical resistance of most metals that I am aware of DOES increase
with temperature; however, the change in resistance is not very dramatic. I
believe that the resistivity of semi-conductors is much more temperature
I seem to recall that all metals increase electrical resistance with
increased temperature. Whether it is non-linear or not, I do not know, but I
believe nichrome (sp?) at least has a very steep slope on its graph of temp
vs. resistance. Try the Handbook of Chemistry and Physics for real numbers.
Hope this lead helps.
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Update: June 2012