Thermoelectric conversion technique

Patent metadata

Field	Value
Publication number	US-11737365-B2
Application number	US-202117517043-A
Country	US
Kind code	B2
Filing date	Nov 2, 2021
Priority date	Sep 9, 2019
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

The present disclosure provides a thermoelectric conversion material having a composition represented by a chemical formula of Ba1-a-b-cSrbCacKaMg2Bi2-dSbd. In the chemical formula, the following relationships are satisfied: 0.002≤a≤0.1, 0≤b, 0≤c, a+b+c≤1, and 0≤d≤2. In addition, the thermoelectric conversion material has a La2O3-type crystal structure.

First claim

What is claimed is:

1. A thermoelectric conversion material having a composition represented by a chemical formula of Ba 1-a-b-c Sr b Ca c K a Mg 2 Bi 2-d Sb d ,
where
0.002≤ a≤ 0.1,

0≤ b,

0≤ c,

a+b+c≤ 1, and
0≤ d≤ 2,

wherein
the thermoelectric conversion material has a La 2 O 3 -type crystal structure.

2. The thermoelectric conversion material according to claim 1 , wherein
the thermoelectric conversion material has a p-type polarity.

3. A p-type thermoelectric conversion device, comprising a thermoelectric converter,
wherein
the thermoelectric converter comprises the thermoelectric conversion material according to claim 1 .

4. A thermoelectric conversion device comprising:
a p-type thermoelectric converter;
an n-type thermoelectric converter;
a first electrode;
a second electrode; and
a third electrode,
wherein
a first end of the p-type thermoelectric converter and a first end of the n-type thermoelectric converter are electrically connected to each other via the first electrode,
a second end of the p-type thermoelectric converter is electrically connected to the second electrode,
a second end of the n-type thermoelectric converter is electrically connected to the third electrode, and
the p-type thermoelectric converter comprises the thermoelectric conversion material according to claim 1 .

5. A method for obtaining electrical power by using the thermoelectric conversion material according to claim 1 , the method comprising:
applying a temperature difference to the thermoelectric conversion material.

6. A method for transporting heat by using the thermoelectric conversion material according to claim 1 , the method comprising:
applying a current to the thermoelectric conversion material.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Tamaki Hiromasa
• Sato Hiroki
• Kanno Tsutomu

Classifications

• H10N10/853 Primary

  comprising arsenic, antimony or bismuth (H10N10/852 takes precedence) · CPC title

• C01G29/006

  Compounds containing bismuth, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G30/002

  Compounds containing antimony, with or without oxygen or hydrogen, and containing two or more other elements (C01G30/001 takes precedence) · CPC title

• H10N10/17

  characterised by the structure or configuration of the cell or thermocouple forming the device · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title