Steven T. Ratliff
Associate Professor of Physics
Northwestern College
3003 Snelling Ave. N.
St. Paul, MN 55113-1598
U. S. A.
Internet: str@nwc.edu (or stratliff@nwc.edu)
Larry Woolf <larry.woolf@GAT.COM>
Sent by: "phys-l@lists.nau.edu: Forum for Physics Educators" <PHYS-L
03/07/01 04:01 PM
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Subject: Re: Conductivity of Copper
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.