The original LK99 room temperature superconducting company, Q-Centre, has information in their patent. They provide more detailed measurements, evidence and process description. They say the micron(s) thick thin film is nearly half superconductive material.
In 2008, the LK99 korean researchers founded the Quantum Energy Research Centre (퀀텀 에너지연구소; also known as Q-Centre) with other researchers from Korea University. Lee would later become CEO of Q-Centre, and Kim would become director of research and development.
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
– 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
Chemists Strike Back
⏰ 23 Aug 2023
Quantum updates Korean patent
– the vapor deposition is how they discovered the solid state method!
– they reacted the materials together in a vacuum, and put a glass plate into the path of the vapor
– The film is formed in… pic.twitter.com/22O9B0UUbE
— Ate-a-Pi (@8teAPi) August 23, 2023
I kid you not, they look at the color of the film deposited to indicate where it is superconductive pic.twitter.com/YW640cX0zB
— Ate-a-Pi (@8teAPi) August 12, 2023
Brian Wang is a Futurist Thought Leader and a popular Science blogger with 1 million readers per month. His blog Nextbigfuture.com is ranked #1 Science News Blog. It covers many disruptive technology and trends including Space, Robotics, Artificial Intelligence, Medicine, Anti-aging Biotechnology, and Nanotechnology.
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