Process for treating orientation texture of thermoelectric ceramic material |
Title： |
| Process for treating orientation texture of thermoelectric ceramic material |
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Application Number： |
200410088597 |
Application Date： |
2004/11/09 |
Announcement Date： |
2005/06/01 |
Pub. Date： |
2006/11/01 |
Publication Number： |
1621389 |
Announcement Number： |
1282628 |
Grant Date： |
2006-11-1 |
Granted Pub. Date： |
2006-11-1 |
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C04B 35/622, C04B 35/624, C04B 35/64, C04B 35/01 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Liu Yuheng, Nan Cewen, Shen Zhijian |
Key Words： |
treating process, orientation texture, thermoelectric ceramic material |
Abstract： |
The present invention is orientation texture treating process of thermoelectric ceramic material in material treating technology. Ca-Co-O system and La-Ca-Co-O system are taken as the experiment objects, and through sol-gel process to synthesize precursor powder, sintering in spark plasma sintering furnace to form ceramic, and hot forging to orientate at high temperature to make ceramic material possess better plasticity and ductility, thermoelectric oxide material with density as high as 98-99 % and high orientated texture may be obtained. The said treating process makes the Ca-Co-O system possess 13 % raised conductivity and 28 % raised power factor at 700 deg.c and the La-Ca-Co-O system possess 29.3 % raised conductivity and 61.3 % raised power factor at 700 deg.c. The said treating process is simple and short in treating time and can improve the processing of thermoelectric ceramic obviously. |
Claim： |
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Priority： |
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PCT： |
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LegalStatus： |
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