2006-09-01 02:39:19 · 4 answers · asked by AKSM 1 in Science & Mathematics ➔ Chemistry
I don't know the exact record. I do know that it has not been pushed up much more since the big breakthrough with the liquid-nitrogen temperature superconductors discovered in the mid-1980's. We are not even close to dry-ice (solid carbon dioxide) temperatures yet.
There were attempts to push up the critical temperature by doping the basic copper-oxide/ rare earth structures, and by subjecting them to high pressures, hundreds of thousands of PSI. None of them bore any fruit, as far as I know.
I saw one or two news reports of supposed room temperature superconductivity in polymers, back in 2000 or 2001. Either the reporters got their facts wrong, or the discoverers were mistaken and jumped the gun in publicizing it. Plastic superconductors would be so much more easily compounded and turned into manufactured items (wires, cables, for coils, motors, and generators) that they could easily have taken the market away from the current fragile ceramics materials which are difficult to shape. I'm still waiting to hear, too.
2006-09-01 02:59:17 · answer #1 · answered by cdf-rom 7 · 0⤊ 0⤋
The wikipedia entry on superconductors doesn't mention any recent activity.
2006-09-01 11:59:56 · answer #2 · answered by Mr. E 5 · 0⤊ 0⤋
53k Ohms... I dont know
2006-09-01 12:40:17 · answer #3 · answered by Anonymous · 0⤊ 0⤋
not sure
2006-09-01 09:52:14 · answer #4 · answered by Nirmal87 2 · 0⤊ 1⤋