Harry,
They can be made, but not yet in wire form.
Thin films containing Ultraconductors 1 or 2 microns in diameter (1/50th the
diameter of a human hair) can always carry 50 Amperes. The Ultraconductors
run through the film in the thin direction, (i.e. normal to the film).
Wire is 3 years
Much as I'd like to have some ultraconductor wire to play with, I'm not
convinced that Ultrqaconducting Magnetic Energy Storage will replace
batteries. Magnetic fields create a pressure equal to the energy
density- and therefore require a strong (read heavy and expensive)
mechanical
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