Calcium cobaltate-based oxide thermoelectric material and its prepn.
Title：
Calcium cobaltate-based oxide thermoelectric material and its prepn.
Application Number：
 02121433
Application Date：
 2002/06/21
Announcement Date：
 2003/01/08
Pub. Date：
Publication Number：
 1389430
Announcement Number：
 1182070
Grant Date：
 2004-12-29
Granted Pub. Date：
 2004-12-29
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 C01G 51/00, C04B 35/32, C04B 35/622, H01L 21/02
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Nan Cenwen, Nan Jun, Wu Junbo
Key Words：
 Calcium cobaltate-based oxide, thermoelectric material, prepn.
Abstract：
 The present invention relates to a calcium cobaltate base oxide thermoelectric material and its preparation method. Said invention utilizes sel-gel process, uses inorganic nitrate as raw material, uses citric acid as complexing agent to form sol at 60 deg.C-100 deg.C and form gel at 100 deg.C-130 deg.c, then utilizes presintering process to obtain precursor nano powder, finally utilzies sintering process to obtain block body material. The non-dimensional thermoelectric optimum value ZT of said prepared Ca3Co4O9 base oxide thermoelectric material is about 0.2 (in 1000 K). Said invented product can be used in the field of waste-head utilization and high-temp. power generation.
Claim：
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PCT：
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