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Broadening the application field of high-temperature superconductors
[ Instrument network instrument research and development ] Superconductivity is one of the fascinating macroscopic quantum phenomena in physics, and it is a new research field. But the mechanism of unconventional high-temperature superconductivity is still not completely solved. How to find the key to the secret door of high-temperature superconductivity is a problem that scientists are striving for. The usual research method of physicists is to try to use simple models to reveal the laws of the world.
It is reported that Russia's Moscow State University of Nuclear Energy Research Institute has developed a new type of high-temperature superconducting tape. Relevant experts believe that the research results will broaden the application fields of high temperature superconductors, such as new engines, bearings and kinetic energy storage. The research results have been published in a number of scientific journals such as Materials Research Letters.
High-temperature superconductors are a family of superconducting materials that have general structural features and relatively well-spaced copper oxide planes. They are also called copper oxide superconductors. Because there is no resistance, superconductors are often used to make wires and cables. Unlike ordinary conductors (such as copper and aluminum), if a current is passed through them, the superconductor will not generate heat at all, that is, it will not cause energy loss.
High-temperature superconductors are not the hundreds of thousands of temperatures that most people think, but they are much higher than the ultra-low temperatures required by the original superconductors, but they are also about 200 degrees Celsius. In the superconductors studied by humans, the temperature is increased a lot, so it is called a high temperature superconductor.
In addition, superconductors push out internal magnetic fields. This means that if a magnet is placed above the superconductor, the magnet will not fall down and will float at a certain height. Because of this quantum nature of the superconducting state, magnets and superconductors will "bundle" each other no matter how they move with each other. This phenomenon is called "maglev". Therefore, a new type of high-temperature superconducting tape can be developed.
"This material is more functional than traditional ceramic superconductors," said Igor Rudnev, director of the Laboratory of Superconductivity and Magnetic Phenomena at the Institute of Laser and Plasma Technology, Moscow State University of Nuclear Energy Research University. The results of our extensive experiments and theoretical work show that the use of high-temperature superconducting tapes in magnetic levitation systems is undoubtedly promising. "
Source: University of Science and Technology of China, China Science and Technology News