In a paper posted on arXiv on 2023-07-23, three researchers from the Quantum Energy Research Centre, Inc. and KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, South Korea, report the production and test of a lead-apatite 35 material which they claim exhibits all of the phenomena of superconductivity at room temperatures and above (they state its critical temperature, below which it is a superconductor, as 400 K, or 127° C) and ambient atmospheric pressure at sea level.
This paper is the first scientific disclosure of these results. The posting on arXiv lists no submission to or acceptance of the paper by a peer-reviewed journal. However, @CTLaw has found three filings with the Korean patent office regarding this work, all filed in March 2023 with a “Priority date” (whatever that is) of 2021-08-25:
- WO2023027537 “ROOM-TEMPERATURE AND ATMOSPHERIC-PRESSURE SUPERCONDUCTING CERAMIC COMPOUND AND PREPARATION METHOD THEREFOR 12”
- KR20230030188 “Ceramic composite with superconductivities over room temperature at atmospheric condition and mehtod of manufacturing the ceramic composite 8” (misspelling of “method” in original)
- KR20230030551 “Ceramic composite with superconductivities over room temperature at atmospheric condition and mehtod of manufacturing the ceramic composite 5” (misspelling of “method” in original)
The menu at the left of these items allows viewing description, claims, cited, and citing documents, with buttons to machine translate from Korean where required. No other patent filings have been found so far.
This silent video from the Quantum Energy Research Centre, institution of two of the co-authors, purports to show repulsion of a copper disc with a thermally deposited coating of the LK-99 material from a permanent magnet, as would be expected to occur from a superconductor manifesting the Meissner effect.
To read more, click here.