From: utzoo!decvax!harpo!seismo!hao!hplabs!sri-unix!KING@KESTREL Newsgroups: net.physics Title: thermal superconductors Article-I.D.: sri-unix.4953 Posted: Tue Dec 28 10:01:52 1982 Received: Wed Dec 29 04:56:20 1982 From: Richard M. King I stand by my comment that electrical superconductors are thermal superconductors (wih the possible exception of Josephson junctions that are in the superconducting state). While I haven't performed the experiment myself, Scientific American has run at least a half dozen articles on this or that aspect of superconductivity, and many of them mention thermal superconductivity as well. (Note that in ordinarly metals heat and electricity are both carried by the "electron gas".) Thermal superconductivity, like electrical superconductivity, does not require infinite speed. It only requires lack of a temperature difference over any distance with any STEADY-STATE heat flux (just like electrical superconductors are allowed to have transient voltage drops, but not steady-state ones). Dick -------