![]() ![]() It’s a gigantic step to just show that such things can exist. If this is real, vast amounts of work will go into seeing if that current density can be increased by more careful synthesis and fabrication. We also don’t have a feeling for how such a quantum-well superconductor behaves in general, if that’s how it works. But it has to be noted that this is indeed a polycrystalline material as synthesized, and that junctions between the different crystal domains can affect this profoundly. ![]() That might not be surprising, either, because other superconductors generally carry less current density the higher the temperature gets (i.e., the closer to the critical temperature). ![]() Whether LK-99 itself becomes a big industrial material is open to question – one of the things you get from the characterization data is that LK-99 is not able to carry much current in its superconducting state at these high temperatures, and that’s a key property for many applications. Its critical temperature is said to be 127C (!) The phrase “boiling-water superconductor” is not one that I had ever used until yesterday. We’ve been getting excited over the years about superconducting materials that don’t even quite have to be cooled with liquid nitrogen, and this stuff is claimed to superconduct all the way up to room temperature and indeed up past the boiling point of water. PHD Chemist reviews the work in the Journal Science. The First Room-Temperature Ambient-Pressure Superconductor:Ī material called LK-99, a modified-lead apatite crystal structure, achieves superconductivity at room temperature. The researchers were likely mistaken and not frauds. NOTE: More charts of resistance is leaning towards this being a strong diamagnet and not a superconductor. The unique structure of LK-99 that allows the minute distorted structure to be maintained in the interfaces is the most important factor that LK-99 maintains and exhibits superconductivity at room temperatures and ambient pressure. The heat capacity results indicated that the new model is suitable for explaining the superconductivity of LK-99. It concurrently transfers to Pb(1) of the cylindrical column resulting in distortion of the cylindrical column interface, which creates superconducting quantum wells (SQWs) in the interface. The shrinkage is caused by Cu2+ substitution of Pb2+(2) ions in the insulating network of Pb(2)-phosphate and it generates the stress. The superconductivity of LK-99 originates from minute structural distortion by a slight volume shrinkage (0.48 %), not by external factors such as temperature and pressure. The superconductivity of LK-99 is proved with the Critical temperature (Tc), Zero-resistivity, Critical current (Ic), Critical magnetic field (Hc), and the Meissner effect. For the first time in the world, researchers (From Korea University, Sukbae Lee, Ji-Hoon Kim, Hyun-Tak Kim) have succeeded in synthesizing a room-temperature superconductor (Tc≥400 K, 127∘C) working at ambient pressure with a modified lead-apatite (LK-99) structure. ![]()
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