Researchers at Russia's National Energy Research Institute for Research and Technology (NUST) have recently developed a new method that can economically and rapidly develop materials needed for high-efficiency thermoelectric generators in spacecraft. This material can directly convert thermal energy into electrical energy. Related articles were published in the Journal of Materials Chemistry A.
The new fabrication method takes advantage of the structural features of metal compounds, which they use to create crystals of metal compounds that contain voids, which are then filled with atoms. The resulting thermoelectric material contains two types of atoms: atoms that are held in the lattice to ensure high electrical conductivity, and atoms that can greatly reduce thermal conductivity.
The methods for obtaining thermoelectric materials used in the previous studies have been long and costly. The research team member Andrei Voronin introduced that the new process uses indium as a filler, selects the appropriate initial metal ratio, and synthesizes the required materials in an open reactor. The synthesis process can be completed in only two minutes. The annealing takes 5 hours. This material and synthetic feature can speed up the entire process by several dozen times, thereby reducing the cost of the material obtained.
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