On July 22, a research team of scientists in South Korea submitted two papers on superconductors on the preprint system arXiv: "The First Room Temperature and Normal Pressure Superconductor" and "Superconductor Pb10-xCux (PO4) 6O Shows Suspension Phenomenon and Its Mechanism at Room Temperature and Normal Pressure". They said they had discovered the world's first room-temperature superconducting material , the modified lead apatite crystal structure ( hereinafter referred to as LK-99, a copper-doped lead apatite). As soon as
the news came out, it aroused widespread concern. Some media believe that if room temperature superconductivity is realized, it will be possible to completely subvert all aspects of future science and technology and usher in the fourth industrial revolution.
"The First Room Temperature and Atmospheric Pressure Superconductor" Photo: Internet
However, while everyone is talking about this, industry insiders point out that there are obvious discrepancies between the two papers. In
response, Professor Hyun-Tak Kim of the research team said in an email to the media: "In fact, we found an error in the second paper before: when combining the two data, one of the multipliers was inadvertently omitted.". So one of the data in this paper is wrong. We have now uploaded the revised version to arVix, and the revised paper will be available to you on Tuesday. "
It is reported that the team uploaded a video in the first paper of arVix, the first room-temperature and normal-pressure superconductor, to prove the suspension of LK-99 on the magnet, that is, the Meissner effect ." It is an important phenomenon to prove the superconductivity of materials.
At present, many research groups around the world have been speeding up the replication of this research. The official of the Chinese Academy of Sciences said that according to the South Korean author, a batch of samples could be prepared as soon as three days. Probably next week, the preliminary verification results will be released. But Professor Hyun-Tak Kim told the media that the manufacturing time of LK-99 is not as short as "three days". He points out that his team's proposed room-temperature superconductor, LK-99, could be replicated by anyone within a month.
But in this regard, our domestic professionals in the field of superconductivity believe that the superconductor announced by the research team is most likely not room temperature superconductivity . Hong Zhiyong, director of
Shanghai Superconducting Materials and Systems Engineering Research Center and expert of superconducting application research, said at an internal telephone conference held by Dongwu Electronics on the morning of the 30th that the superconductor recently announced by the Korean research team is not a room-temperature superconductor. Wen Haihu, a professor at the School of Physics of
Nanjing University, said in an interview with the media: "We have carefully analyzed their data from three aspects-resistance, magnetization and so-called magnetic levitation, which are not enough to show that it is a superconducting phenomenon (material)." "We judged that [its so-called superconductivity] was most likely an illusion.". What is the impact of
superconductivity on electricity?
So what exactly is a superconductor? Why is the attention so high?
Superconductor, also known as superconducting materials, refers to the conductor at a certain temperature, the resistance is zero, the conductor has no resistance, the current flows through the superconductor without heat loss, the current can form a strong current in the wire without resistance, thus producing a super-strong magnetic field. The biggest feature of
superconducting transmission technology is that it can achieve zero power loss in the transmission process, which can be said to be the most ideal power transmission technology, and therefore it is known as the next generation of power transmission strategic technology.
At present, conventional superconductors require extremely low temperatures to achieve superconductivity, which limits their application in various fields. One of the most significant advantages of room-temperature superconductors is that they provide unprecedented energy efficiency.
In general, the losses during transmission are mainly caused by the heat generated by the resistance. Data show that when copper or aluminum conductors are used for transmission, about 15% of the power will be lost on the transmission line. That is to say, the loss of 10 million kilowatts of electricity is equivalent to a 1 million kilowatt power station. Compared
with conventional cables, the conductor loss of superconducting cables is less than one tenth of that of conventional cables, plus the energy loss of cooling, the total loss of superconducting cables is only 50% to 60% of that of conventional cables, and the current transmission capacity of superconducting cables with the same cross section is 3 to 5 times that of conventional cables. At the same time, it has the advantages of consuming less metal and insulating materials, no pollution and low noise.
In our country, the annual loss of electricity is as high as hundreds of billions of degrees. If it is replaced by superconducting materials with zero resistance, the power saved will be equivalent to building dozens of large power plants.
Therefore, if the results of this study are true, the entire power infrastructure may be transformed.
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