Re: Conductivity of Copper

[Larry Woolf <larry.woolf@GAT.COM>]

 From a chart prepared by NIST Boulder:

RRR is residual resistivity ratio (300K value/4K value)

Electrical resistivity of  copper (10^-8 ohm-m)

oxygen free, annealed: 1.71 at 293K, 0.19 at 77K, RRR of 700-50

electrolytic tough pitch, annealed: 1.71 at 293K, RRR of 100-10

Impurity elements that have the greatest effect on the residual resistivity
are:
As, Bi, Co, Fe, Sb, Se, Te, Ti, V

Larry




(3)  What is the resistivity of non-OFHC copper?  I was wondering how much
difference the OFHC makes.


Steven T. Ratliff
Associate Professor of Physics
Northwestern College
3003 Snelling Ave. N.
St. Paul,  MN     55113-1598
U. S. A.