Title:
希土類三二カルコゲナイド焼結体およびその製造方法ならびに希土類三二カルコゲナイド粉末およびその製造方法
Document Type and Number:
Japanese Patent JP3972067
Kind Code:
B2
Abstract:
To provide a sintered rare earth sesquichalcogenide compact with which the influence of a phase transformation can be averted by sintering raw material powder at a temperature lower than the manufacturing temperature thereof, and which is low in resistivity and excellent in electric conductivity and is adequate for use as a thermoelectric conversion material, and its manufacturing method.
The sintered rare earth sesquichalcogenide compact is manufactured by adding ≤0.1 to 10wt%, for example, Mn, to the rare earth sesquichalcogenide powder expressed by composition formula A2B3(A is at least one rare earth element, such as Ce; B is at least one calcogen element, such as S), for example, La2S3powder, and sintering the powder at a temperature lower than the manufacturing temperature of the rare earth sesquichalcogenide powder, at a temperature about, for example, 800°C. Also, the sintered rare earth sesquichalcogenide compact is manufactured by adding 1.0 to 20wt% alkaline metal to the rare earth sesquichalcogenide powder, and sintering the powder at a temperature above 600°C and <2,400°C.
COPYRIGHT: (C)2005,JPO&NCIPI
Inventors:
Shinji Hirai
Satoshi Nishimura
Joichiro Uemura
Michihiro Ota
Application Number:
JP2004077204A
Publication Date:
September 05, 2007
Filing Date:
March 17, 2004
Assignee:
Hokkaido TRL Co., Ltd.
International Classes:
C04B35/50; C04B35/547; C01B19/04; C01F17/00; H01B3/12; H01L35/14; H01L35/16; H01L35/34
Domestic Patent References:
| JP2003258322A | | | | |
| JP46007563A | | | | |
| JP2289457A | | | | |
Attorney, Agent or Firm:
Koichi Mori
