HIGH-EFFICIENT THERMOELECTRIC MATERIAL AND METHOD OF ITS MANUFACTURE Russian patent published in 2018 - IPC H01L35/26 B82Y30/00 

FIELD: nanotechnologies.

SUBSTANCE: invention relates to nanostructured and nanocomposite materials. One of the main applications of the invention is the creation of high-efficiency solid-state thermoelectric converters of thermal energy into electricity or electrical energy into heat or cold. Thermoelectric material is manufactured by the method of joint multiple rolling of two different thermoelectric materials and consists of alternating layers of these materials with an average thickness within the range of 5–100 nm, all layers of the thermoelectric material consist of particles sized within the range of 1–20 nm with a small angular misorientation of the crystal lattices in the particles and between the particles, wherein the first thermoelectric material has a bandgap width smaller than the bandgap width of the second thermoelectric material, and the electrical conductivity of the first thermoelectric material is higher than the electrical conductivity of the second thermoelectric material, so that at the boundaries between the layers of the first and second thermoelectric materials potential barriers of the order height K_bT, where K_b is the Boltzmann constant and T is the absolute temperature. Thermoelectric material is manufactured at a rolling plant for thermoelectric materials, consisting of one pair of rotating rolls or several pairs of rotating rolls arranged in series one after another with a decreasing gap between the rollers in the direction of motion of the rolled thermoelectric material, pusher-type device for feeding the initial sample into rolls and device for separating the rolled thermoelectric material into samples of a given size.

EFFECT: technical result observed in the implementation of the said solution consists in creation of a nanostructured thermoelectric material with increased values of the thermoelectric quality factor.

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