Method for preparting Nano powder of zirconia
Title：
Method for preparting Nano powder of zirconia
Application Number：
 200610112779
Application Date：
 2006/09/01
Announcement Date：
 2007/02/21
Pub. Date：
Publication Number：
 1915836
Announcement Number：
Grant Date：
Granted Pub. Date：
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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