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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10297738 B1

PDFFull Text
Date of Patent:
May. 21, 2019

Filed:

Mar. 28, 2016

Thermoelectric conversion material comprising a full-heusler alloy and method for manufacturing the same by alloying and successively heating a raw material

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventors:

Akinori Nishide, Tokyo, JP;

Naoto Fukatani, Tokyo, JP;

Jyun Hayakawa, Tokyo, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorney:

Volpe and Koenig, P.C.

Primary Examiner:

Kenneth A Bratland, Jr

Int. Cl.
CPC ...
C30B 1/02 (2006.01); H01L 35/20 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); H02N 11/00 (2006.01); B22F 3/105 (2006.01); H01L 35/30 (2006.01); H01L 35/32 (2006.01); H01L 35/34 (2006.01);
U.S. Cl.
CPC ...
H01L 35/20 (2013.01); B22F 3/105 (2013.01); C22C 33/02 (2013.01); C22C 38/00 (2013.01); H01L 35/30 (2013.01); H01L 35/32 (2013.01); H01L 35/34 (2013.01); H02N 11/00 (2013.01);
Abstract

The present invention provides a metal-based thermoelectric conversion material having a high figure-of-merit ZT, the thermoelectric conversion material being a p-type or n-type full-Heusler alloy, having a composition of an Fe2TiA type (wherein A is Si and/or Sn), and including crystal grains having an average grain diameter of 30-500 nm. In particular, in the case where the composition of an Fe2TiA type is represented by the empirical formula Fe2+σTi1+yA1+z, the values of σ, y, and z in an Fe—Ti-A ternary alloy phase diagram lie within the range α surrounded by the points (50, 37, 13), (45, 30, 25), (39.5, 25, 35.5), (50, 14, 36), (54, 21, 25), and (55.5, 25, 19.5) in terms of (Fe, Ti, A) in at %.

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