A porous piezoelectric ceramic and its manufacture method |
Title： |
| A porous piezoelectric ceramic and its manufacture method |
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Application Number： |
200610114599 |
Application Date： |
2006/11/17 |
Announcement Date： |
2007/04/25 |
Pub. Date： |
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Publication Number： |
1953226 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
H01L 41/187, H01L 41/083, H01L 41/24, C04B 35/472, C04B 35/622, C04B 35/632 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Li Jingfeng, Zhang Hailong |
Key Words： |
porous, piezoelectric ceramic, manufacture method |
Abstract： |
The invention relates to a porous piezoelectric ceramic and relative production. Wherein, it uses organic as holing agent to hole the piezoelectric ceramic; changing the content of holing agent from layer to layer to from the porous piezoelectric ceramic with composite and gradient changeable hole rates; the content of holing agent is 0-50vol%; the hole rate is 3-50%; the layers of product is 3-5, while the thickness of each layer is 0.2-0.5mm and the total thickness is 1-2mm. the invention has the advantages that it increases the hole rates along thickness direction, to obtain decreased sound resistance whose gradient change can avoid loss of electric signal at the interface between piezoelectric ceramic and human or water, to improve the resolution of heat exchanger. Compared with 1-3 structure piezoelectric composites, the invention has simple method and lower cost. |
Claim： |
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Priority： |
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PCT： |
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