Thermoelectric conversion element and thermoelectric conversion device

Patent metadata

Field	Value
Publication number	US-12557552-B2
Application number	US-202117920354-A
Country	US
Kind code	B2
Filing date	Apr 23, 2021
Priority date	Apr 23, 2020
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A thermoelectric conversion element is made of an alloy including a transition metal. The alloy is a compound having a crystal structure including a Kagome lattice plane constituted by the transition metal, and exhibits an anomalous Nernst effect. A thermoelectric conversion device includes a substrate and a plurality of thermoelectric conversion elements on the substrate. Each of the plurality of thermoelectric conversion elements is defined as the thermoelectric conversion element described above and has a shape extending in one direction. The plurality of thermoelectric conversion elements are arranged in parallel in a direction perpendicular to the one direction and electrically connected in series.

First claim

The invention claimed is:

1 . A thermoelectric conversion element made of Fe 3 Sn 2 exhibiting an anomalous Nernst effect, wherein
an absolute value of a Nernst coefficient of Fe 3 Sn 2 increases with an increase in temperature for a temperature exceeding 150 K.

2 . The thermoelectric conversion element according to claim 1 , wherein
the absolute value of the Nernst coefficient of Fe 3 Sn 2 increases with an increase in temperature for a temperature of 300 K or higher.

3 . A thermoelectric conversion device comprising:
a substrate; and a plurality of thermoelectric conversion elements on the substrate, wherein each of the plurality of thermoelectric conversion elements is defined as the thermoelectric conversion element according to claim 1 , and has a shape extending in one direction, and the plurality of thermoelectric conversion elements are arranged in parallel in a direction perpendicular to the one direction and electrically connected in series.

4 . The thermoelectric conversion device according to claim 3 , wherein the plurality of thermoelectric conversion elements are arranged in a serpentine shape.

5 . A thermoelectric conversion device comprising:
a hollow member; and the thermoelectric conversion element according to claim 1 , the thermoelectric conversion element being a sheet-shaped element or a wire rod covering an outer surface of the hollow member.

6 . A thermoelectric conversion element made of RCo 5 where R is a rare-earth element, wherein
the rare-earth element is one of Y, La, Ce, Pr, Nd, Gd, Tb, Dy, Ho, and Er, and the RCo 5 exhibits an anomalous Nernst effect.

7 . A thermoelectric conversion element
made of RCo 4 M where R is a rare-earth element and M is B or Ga, wherein the rare-earth element is one of Y, La, Ce, Pr, Nd, Gd, Tb, Dy, Ho, and Er, and the RCo 4 M exhibits an anomalous Nernst effect.

8 . A thermoelectric conversion element made of Fe 16 N 2 and exhibiting an anomalous Nernst effect.

9 . A thermoelectric conversion device comprising:
a substrate; and a plurality of thermoelectric conversion elements on the substrate, wherein each of the plurality of thermoelectric conversion elements is defined as the thermoelectric conversion element according to claim 8 , and has a shape extending in one direction, and the plurality of thermoelectric conversion elements are arranged in parallel in a direction perpendicular to the one direction and electrically connected in series.

10 . The thermoelectric conversion device according to claim 9 , wherein the plurality of thermoelectric conversion elements are arranged in a serpentine shape.

11 . A thermoelectric conversion device comprising:
a hollow member; and the thermoelectric conversion element according to claim 8 , the thermoelectric conversion element being a sheet-shaped element or a wire rod covering an outer surface of the hollow member.

Assignees

• Univ Tokyo

Inventors

• Nakatsuji Satoru

Classifications

• H01F10/18

  being compounds · CPC title

• H01F10/14

  containing iron or nickel ({H01F10/126} , H01F10/13, H01F10/16 take precedence) · CPC title

• H01F10/126

  containing rare earth metals (H01F10/133 takes precedence) · CPC title

• H10N15/20 Primary

  Thermomagnetic devices using thermal change of the magnetic permeability, e.g. working above and below the Curie point · CPC title

• H10N15/00 Primary

  Thermoelectric devices without a junction of dissimilar materials; Thermomagnetic devices, e.g. using the Nernst-Ettingshausen effect (integrated devices or assemblies of multiple devices H10N19/00) · CPC title