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Title:
THERMOELECTRIC MATERIAL, METHOD FOR PREPARING THERMOELECTRIC MATERIAL, THERMOELECTRIC CONVERSION ELEMENT, AND THERMOELECTRIC CONVERSION MODULE
Document Type and Number:
WIPO Patent Application WO/2018/021540
Kind Code:
A1
Abstract:
Thermoelectric materials according to an embodiment of the present invention are a plurality of p-type and n-type thermoelectric materials which constitute a thermoelectric conversion element. Provided are thermoelectric materials, a thermoelectric conversion element using the same, and a thermoelectric module using the thermoelectric materials and thermoelectric conversion element, the thermoelectric materials being characterized in that: a primary phase is an MgAgAs crystal phase; internal defects of the plurality of thermoelectric materials constituting a single thermoelectric conversion element have an area ratio of 10% or less with respect to the total area of defective portions in a scanned surface on which an ultrasonic defect detection is performed in the thickness direction of the thermoelectric material; and the thermoelectric material comprises a sintered body which has no defect with a length of 800 μm or more on any vertex of cubic chips of the thermoelectric material.

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Inventors:
YAMAMOTO SHINICHI (JP)
OKAMURA MASAMI (JP)
NAKASHIMA NOBUAKI (JP)
MIZOBE MASANORI (JP)
Application Number:
PCT/JP2017/027476
Publication Date:
February 01, 2018
Filing Date:
July 28, 2017
Export Citation:
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Assignee:
TOSHIBA KK (JP)
TOSHIBA MATERIALS CO LTD (JP)
International Classes:
H01L35/14; B22F3/14; B22F3/24; B22F9/04; C22C12/00; C22C13/00; C22C27/00; C22C30/04; H01L35/20; H01L35/34
Domestic Patent References:
WO2014014126A12014-01-23
WO2004049464A12004-06-10
WO2009008127A12009-01-15
Foreign References:
JP2007158191A2007-06-21
JP2005317603A2005-11-10
JP2000244026A2000-09-08
JP2002111084A2002-04-12
JP2010001506A2010-01-07
JP2013191838A2013-09-26
Other References:
See also references of EP 3493281A4
Attorney, Agent or Firm:
KURATA, Masatoshi et al. (JP)
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