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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
It's not a discovery until it's been independently confirmed. I think the official record still stands at 185K or thereabouts.
Also, to put it in perspective, he's measuring a minuscule change in resistance and permeability of a pellet that has a resistance of about 15 ohms, and inferring that this is caused by a small fraction of the pellet becoming superconductive, and this superconductive fraction could somehow be purified to make a useful HTS.
But the reality is that what he actually has on the lab bench, even below its transition temperature, is a conductor orders of magnitude worse than copper. I can't help thinking of the Bedini motor guys who got their motor from 50 to 90% efficient, so they get all optimistic and think 130% is just around the corner.
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
I agree, this may be a bit premature but still a discovery of note.
If I remember my SC history correctly some of the early attempts at an LN2 SC were similarly low percentages, so its likely that several more years will be needed to determine the exact structure that works in bulk, same as with YBa2CU3O7.
EDIT:- It seems that a promising line of research might be to mix a moderately strong oxidising agent (i.e. a peroxide compound) and fire the mix at relatively low temperature under containment and pressure in a strong electric field to force the Cu-O planes to align in much the same way as domains within a piezoelectric material will.
My thinking is that if holding barium titanate at just above the Curie point while applying a strong electric field causes the molecules to align then surely the same idea will work for any polar molecule.
Something like a glass cell with the initially fired and compressed precursor pellet with barium peroxide held within, and copper plates either side to act as contacts. Then heat it up inductively while applying the electric field for several hours, and slowly cool.
In fact, another possible idea could be to use another compound which releases oxygen when heated, plated onto one or both of the copper plates. Any ideas?
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Superconductivity at 20C
