| General > General Technical Chat |
| South Korean Scientists Claim Ambient Temp. Superconductivity |
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| TimFox:
MRI superconductors need to work at high current and high magnetic field, not just superconduct at a useful temperature. |
| gnuarm:
--- Quote from: HuronKing on July 27, 2023, 09:02:22 pm --- --- Quote from: gnuarm on July 27, 2023, 08:35:36 pm --- --- Quote from: HuronKing on July 27, 2023, 08:18:25 pm --- --- Quote from: gnuarm on July 27, 2023, 05:35:59 pm ---I thought we already had superconductors at liquid nitrogen temperatures? That's much easier to come by than liquid helium. You can easily make liquid nitrogen in any facility. --- End quote --- Liquid nitrogen can only get down to 60K. That's used for external cooling. The internal MRI magnet materials need to get down to 4K for superconductivity: https://mriquestions.com/superconductive-design.html The cooling apparatus are the most expensive and difficult part of MRI machines. Eliminating the need for complex liquid helium containment would make MRI machines far cheaper and mobile. --- End quote --- I'm sure that's true for various MRI machines. But superconductors exist at temperatures well above 60 °K. --- End quote --- Yes but none of those are suitable for applications where we need to use liquid helium (MRIs being the most common case) which is what I thought you were referring to (since that's the example I was pointing at). :) Some stuff can superconduct with liquid nitrogen but its still hardly ambient temp! ;D --- End quote --- Which is what I said, no? --- Quote ---I thought we already had superconductors at liquid nitrogen temperatures? --- End quote --- |
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