LANTHANUM SULFIDE SINTERED COMPACT FOR THERMOELECTRIC CONVERSION MATERIAL AND METHOD OF MANUFACTURING THE SAME

Title:

LANTHANUM SULFIDE SINTERED COMPACT FOR THERMOELECTRIC CONVERSION MATERIAL AND METHOD OF MANUFACTURING THE SAME

Document Type and Number:

Japanese Patent JP3877060

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To develop a material for thermoelectric conversion device having a big Seebeck coefficient and a big figure of merit which is acquired by adding electric conductivity.
SOLUTION: A lanthanum sulfide sintered compact comprises a β type crystal structure, in which β type lanthanum sulfide powder and metallic palladium particle are mixed and sintered as major constituents, and a trace of γ type ingredient, wherein the sintered compact contains 1-5 percent by mass of metallic palladium and specific resistance is 100 kΩcm or below. It can be manufactured by mixing high purity β type lanthanum sulfide powder containing oxygen as an impurity of 1.1 weight percent or below and metallic palladium particle with particle diameter of 10 μm or below, and after compression molding with a pressure of 25 MPa or over at ordinary temperatures, sintering it at temperatures ranging from 1200°C to 1500°C in a vacuum or an inert gas for more than 30 minutes.

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Inventors:

Joichiro Uemura
Mitsutomo Mamoru
Satoshi Nishimura
Shinji Hirai
Kazunori Shimakage

Application Number:

JP2002056559A

Publication Date:

February 07, 2007

Filing Date:

March 01, 2002

Export Citation:

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Assignee:

Japan Science and Technology Agency
National Institute for Materials Science

International Classes:

C04B35/547; H01L35/16; B22F3/10; C01F17/00; C22C1/05; C22C29/00; H01L35/34; H02N11/00; (IPC1-7): H01L35/16; B22F3/10; C04B35/547; C22C1/05; C22C29/00; H01L35/34; H02N11/00; //C01F17/00

Domestic Patent References:

JP2001335367A
JP2001223392A

Attorney, Agent or Firm:

Yoshiyuki Nishi

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