US 12,069,952 B2
Thermoelectric conversion material and thermoelectric conversion device using same
Yuriko Kaneko, Nara (JP); Hiromasa Tamaki, Osaka (JP); Tsutomu Kanno, Kyoto (JP); Reiko Hagawa, Osaka (JP); Hiroki Sato, Shiga (JP); and Hyunjeong Nam, Nara (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
Filed on Jun. 22, 2021, as Appl. No. 17/354,935.
Application 17/354,935 is a continuation of application No. PCT/JP2019/026876, filed on Jul. 5, 2019.
Claims priority of application No. 2019-059480 (JP), filed on Mar. 26, 2019.
Prior Publication US 2021/0320239 A1, Oct. 14, 2021
Int. Cl. H10N 10/852 (2023.01); C22C 1/04 (2023.01); C22C 12/00 (2006.01); C22C 30/00 (2006.01)
CPC H10N 10/852 (2023.02) [C22C 1/04 (2013.01); C22C 12/00 (2013.01); C22C 30/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A thermoelectric conversion material which is a polycrystalline material composed of a plurality of crystal grains, the thermoelectric conversion material comprising a composition represented by formula (I): Mg3+mSbaBi2−a−cAc,
wherein, in the formula (I),
A is at least one element selected from the group consisting of Se and Te;
a value of m is greater than 0.42 and less than or equal to 0.5;
a value of a is greater than 0 and less than or equal to 1.0; and
a value of c is greater than or equal to 0.001 and less than or equal to 0.06,
wherein the thermoelectric conversion material has an Mg-rich region.