Method for preparing ceramic with pore gradient |
Title： |
| Method for preparing ceramic with pore gradient |
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Application Number： |
200610011551 |
Application Date： |
2006/03/24 |
Announcement Date： |
2006/09/13 |
Pub. Date： |
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Publication Number： |
1830902 |
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： |
C04B 35/622, C04B 33/28, C04B 38/00 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Huang Yong, Qi Jianqiang, Ouyang Shixi |
Key Words： |
ceramic, pore gradient |
Abstract： |
A process for preparing the porosity-gradient ceramic includes such steps as adding deionized water to ceramic powder and disperser, ball grinding to obtain slurry A, adding deionized water to solidifying organic substance (starch or modified starch), ultrasonic dispersing or ball grinding to obtain slurry B, vacuum mixing, fast filling the mixture in mould, solidifying, drying and sintering. Said ceramic powder is chosen from alumina powder, SiC powder and Si3N4 powder. Said disperser is chosen from ammonium citrate and ammonium tetramethyl hydroxide. |
Claim： |
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Priority： |
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PCT： |
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