Method for preparting Nano powder of zirconia |
Title: |
Method for preparting Nano powder of zirconia |
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Application Number: |
200610112779 |
Application Date: |
2006/09/01 |
Announcement Date: |
2007/02/21 |
Pub. Date: |
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Publication Number: |
1915836 |
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: |
C01G 25/02, B82B 3/00 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Wu Yin, Si Wenjie |
Key Words: |
preparting, Nano powder, zirconia |
Abstract: |
This invention relates to a method for preparing zirconium oxide nanopowder. The method adds a masking agent before mixing the raw material solution and the precipitating agent, and the masking agent can form a stable complex with Zr4+ ions in the raw materials so that they do not react with the precipitating agent. After the solutions are mixed with evenly, the Zr4+ ions are released by adding a demasking agent, thus ensuring one-time explosive nucleation. The reaction is easily controlled by adding masking-demasking agents. The oversaturation degree is controlled within an appropriate range by controlling the addition speed and quantity of the demasking agent, so that the crystal nucleation and growth processes can be divided and high-purity nanoparticles with even distribution can be obtained. Besides, the method operates at room temperature under normal pressure, thus has such advantages as even precipitation, low cost, simple equipment and short preparation period. |
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Relevancy information |
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Last Update |
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2008-4-17 |
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Selected patents owned by Tsinghua University filed in 2005 are loaded. |
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2008-3-31 |
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Selected patents owned by Tsinghua University filed in 2006 and 2007 are load. |
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