A research team of scientists from multiple countries has found a way to capture thermal energy and convert it into electrical energy. It can use car exhaust, interplanetary space probes and thermal energy in industrial production processes to achieve higher energy conversion rates. .

Scientists point out that with this research, we will be able to use thermal energy to produce more electrical energy. Before this, scientists thought it was impossible.

The study is based on a type of microparticle called "paramagnons" (paramagnons), which are not strictly magnets but carry a certain amount of magnetic flux. This is important because the magnet loses its magnetism after heating and becomes "paramagnetic". The spin of the magnetron will produce an energy called "magneto traction thermoelectricity". But since the discovery of this phenomenon, scientists have not been able to use this effect to collect energy at room temperature.

The scientists involved in the study pointed out: "People used to think that no change would occur after paramagnetic heating, but we found that this was not the case. We found a new way to design thermoelectric semiconductors that can use this material to convert thermal energy It is electrical energy. The traditional thermoelectric effect found in the past 20 years is too inefficient and has too little converted energy, so it has not been widely used. And our findings will change this situation. "

Magnets are the key to collecting thermal energy: when one side of the magnet is heated, the other side with lower temperature will gain more magnetism and generate spins, thereby pushing the electrons in the magnet and generating electric current.

But the contradiction is that when the magnet is heated, it will lose most of its magnetism and become paramagnetic, that is, "almost a magnet, but strictly speaking not a magnet." Therefore, before this study, no one had thought of using paramagnetic to collect thermal energy, because scientists believe that paramagnetic can not collect energy. The research team found that the paramagnetic magnetron can push electrons for 10-15 seconds, which is enough for the paramagnetic to collect enough energy.

The researchers first tested whether the paramagnetic magnetron can produce the necessary spins under suitable conditions. It was found that the paramagnetic magnetron can indeed produce the spin required to promote the movement of electrons. In this way, paramagnetic can collect energy.

The scientists involved in this study included researchers from Ohio State University, North Carolina State University and the Chinese Academy of Sciences. The study was conducted in conjunction with the Oak Ridge National Laboratory of the US Department of Energy and was supported by the National Science Foundation, the US Air Force Office of Scientific Research, and the US Department of Energy.

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