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Title:
THERMOELECTRIC MATERIAL AND THERMOELECTRIC MODULE
Document Type and Number:
WIPO Patent Application WO/2019/039320
Kind Code:
A1
Abstract:
Provided is a thermoelectric material 1 having: a parent phase 10 containing a MgSiSn alloy as a main component; vacancies 12 formed in the parent phase 10; and a silicon layer which is formed on at least the wall surfaces of the vacancies 12 and contains silicon as a main component. The thermoelectric material 1 also contains 1.0-20.0 wt% of MgO. The silicon layer contains amorphous Si, or amorphous Si and a nano-sized Si crystal, and the parent phase 10 is composed of a region in which the composition ratio of Si in the chemical composition of the MgSiSn alloy is higher than the other regions, and a region in which the composition ratio of Sn is higher than the other regions. As a result, the thermoelectric material 1 has a lower electrical resistivity while having a lower thermal conductivity.

Inventors:
TSURUMI Shigeyuki (Inc. 4-28-9, Kitayasue, Kanazawa-sh, Ishikawa 22, 〒9200022, JP)
YASUDA Kazumasa (Inc. 4-28-9, Kitayasue, Kanazawa-sh, Ishikawa 22, 〒9200022, JP)
SOTOME Tsuyoshi (Inc. 4-28-9, Kitayasue, Kanazawa-sh, Ishikawa 22, 〒9200022, JP)
KOYANO Mikio (1-1 Asahidai Nomi-sh, Ishikawa 92, 〒9231292, JP)
TOYODA Takeshi (2-1 Kuratsuki, Kanazawa-sh, Ishikawa 03, 〒9208203, JP)
MATOBA Akinari (2-1 Kuratsuki, Kanazawa-sh, Ishikawa 03, 〒9208203, JP)
MINAMIKAWA Toshiharu (2-1 Kuratsuki, Kanazawa-sh, Ishikawa 03, 〒9208203, JP)
Application Number:
JP2018/030049
Publication Date:
February 28, 2019
Filing Date:
August 10, 2018
Export Citation:
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Assignee:
HAKUSAN, INC. (4-28-9, Kitayasue Kanazawa-sh, Ishikawa 22, 〒9200022, JP)
JAPAN ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (1-1 Asahidai, Nomi-shi Ishikawa, 92, 〒9231292, JP)
ISHIKAWA PREFECTURE (1-1 Kuratsuki, Kanazawa-shi Ishikawa, 80, 〒9208580, JP)
International Classes:
H01L35/14; C01B33/02; H01L35/26; H01L35/34; C22C13/00
Domestic Patent References:
WO2016052272A12016-04-07
WO2005091393A12005-09-29
Foreign References:
JP2015053466A2015-03-19
JPH05183196A1993-07-23
JP2014165247A2014-09-08
JP2016132608A2016-07-25
JP2006053693A2006-02-23
Attorney, Agent or Firm:
YOKOI Toshihiro (Universo 105, 5-251 Kuratsuki, Kanazawa-sh, Ishikawa 03, 〒9208203, JP)
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