China Sulfur Contamination Attack on LK99 Paper is Same Work From August

Researchers led by Prof. LUO Jianlin from the Institute of Physics of the Chinese Academy of Sciences (CAS) have observed that Pb10-xCux(PO4)6O (0.9 providing what they say is solid evidence that LK99 is non-superconducting and thus disproving such superconductivity claims.

This same research was reported by Nextbigfuture when the paper was a pre-print back in early August. The Chinese Academy of Sciences press release and the journal Matter just got more aggressive with the wording that claim LK99 is debunked.

It trashes the bulk LK99 part of the Korean work, BUT the Koreans never claimed to measure superconducting resistance for the bulk LK99.
The Koreans only had superconducting resistance for the thin film LK99. 
However, if the Koreans or the Navy group studying thin film LK99 cannot come up with something in a year or so then there may not have been anything there.The Bulk LK99 sulfur contamination does not cause more problems for the LK99 work. Even if the press releases are more angry and insulting with shattered myth language.

There have been previous observations that sulfur contamination contributed to the bulk LK99 effects and observations.

The bulk LK99 observations from the original Korean room temperature superconductor work were not good. However, the Koreans never claimed that the bulk LK99 had low levels of superconducting resistance. But this and the other counter LK99 research does not address the Koreans thin film measurements.

This thin-film only aspect of the korean LK99 work is something that Nextbigfuture has repeatedly observed in their papers and their patent.

pic.twitter.com/3dIaCE3kBT

— FittingMechanics (@FittingMechani1) July 28, 2023

NextBigFuture.com has covered the original LK99 papers and patent, which briefly mention the thin film work and measurements. The original team says that the thin film chemical vapor deposition process is the only one that has superconducting resistance. The thin film is microns thick and is nearly half superconductive material.

The original peer-reviewed LK99 superconductor paper only briefly mentions the thin film work and measurements. However, this is the most important part because only the chemical vapor deposited thin film has the zero resistance superconducting measurement. Nextbigfuture has said that they researchers on LK99 need to put in a effort to check the thing the korean actually said that they did. I think a few tens of millions should be put into to it to make damn sure about the thin film and to try to check the computational theory adjustments.

In August and September 2023, the consensus of other labs was that LK-99 is not a superconductor at any temperature but only bulk non-thin film samples have been made. None of replications have gone through the peer-review process of a journal.

Patent on the LK99 Thin Film Superconductivity

The matching international LK99 patent is here. WO2023027536 and WO2023027537

In the patent, they show and state there is superconducting levels of low resistance. The resistivity of LK-99 was 1/10,000 to 1/100,000 of copper.

For Example 4, the grains of the solid phase reaction were processed into a square shape and the resistance change according to the temperature change (304K ~ 382K) was measured using equipment (Power (voltage/current) Source KEITHLEY 228A, Sensitive Digital Voltmeter KEITHLEY 182, Probe Method: Measured using the 4-probe method) and the results are shown in FIG. 29. Referring to this, it can be seen that the ceramic compound according to the present invention exhibits superconductive properties.

In addition, FIG. 42 is a photograph of an experiment in which resistance was measured in real time for Example 4, and the measured resistance was approximately 10^-12 Ohms per centimeter. Very low resistance in Ohmcm.

Thanks to twitter user @8teAPi for the info on the patent info.

* More description of the vapor deposition process that makes the micron(s) thick thin film which is the only material claimed to be superconducting
* They claim they get 48.9% of the lead apatite thin film as superconductive. There is also lead compounds (40%) and Copper compounds (10%).
* The new description includes some silicon in the process
* lead apatite itself is an insulator and the korean team says they need doping and defects to make it into a superconductor
* The superconductor consists of lead apatite of phases with three different critical temperatures of Tc, I~50C, II~80C, III~125C
* In thin film, only Tc I, II were seen with resistance measurement
* they say there is diamagnetism and ferromagnetism. They say both of these are intrinsic to the mixture
* they say the Meissner effect is underneath the diamagnetism and ferromagnetism. They provide the method to measure the superconducting features
* Scanning Electron Microscope pictures of all the important phases in both methods
* much more detailed measurements and graphs

Solid State Synthesis
– they’ve described this before, but now include a little Silicon in the mixture. But they don’t say how the Si got in there!
– They claim they get 48.9% lead apatite which is superconductive, with two other lead compounds (40%) and Copper compounds (10%).
– However lead apatite itself is an insulator, they say they need doping and defects to make it into a superconductor
– I am still not clear where in the solid state process the superconductor emerges.

For both methods
– The superconductor consists of lead apatite of phases with three different critical temperatures of Tc, I~50C, II~80C, III~125C
– In thin film, only Tc I, II were seen with resistance measurement, while Tc II and III were seen with magnetic susceptability measurement due to higher sensitivity

Magnetism
– they admit diamagnetism, they admit ferromagnetism. They say both of these are intrinsic to the mixture
– they say the Meissner effect is underneath these, and they provide the method to measure it
– the secret is a very low magnetic field generated by the SQUID, while heating and cooling the material
– this allows detection of the expulsion of the flux by the superconductor