发明名称 |
PROCESS FOR THE PRODUCTION OF ULTRAFINE POWDERS |
摘要 |
A process for the production of ultrafine powders consisting of individual particles with sizes in the range of 1 nm to 200 nm, which is based on the mechanical milling of two or more non-reacting powders. The process includes subjecting a suitable precursor metal compound and a non-reactant diluent phased to mechanical milling which through the process of mechanical activation reduces the microstructure of the mixture of the form of nano-sized grains of the metal compound uniformly dispersed in the diluent phase. Heat treating the milled powder converts the nano-sized grains of the precursor metal compound into a desired metal oxide phase. Alternatively, the precursor metal compound may itself be an oxide phase which has the requisite milling properties to form nanograins when milled with a diluent. An ultrafine powder is produced by removing the diluent phase such that nano-sized grains of the desired metal oxide phase are left behind. The process facilitates a significant degree of control over the particle size and size distribution of the particles in the ultrafine powder by controlling the parameters of mechanical activation and heat treatment.
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申请公布号 |
CA2332013(A1) |
申请公布日期 |
1999.11.25 |
申请号 |
CA19992332013 |
申请日期 |
1999.05.17 |
申请人 |
ADVANCED NANO TECHNOLOGIES PTY. LTD. |
发明人 |
MCCORMICK, PAUL GERARD;TZUZUKI, TAKUYA |
分类号 |
B02C19/18;B01J19/00;B22F9/04;B22F9/20;C01B13/14;C01B13/18;C01B13/32;C01F7/02;C01F7/30;C01F7/44;C01F11/06;C01F17/00;C01G1/02;C01G9/02;C01G19/02;C01G23/00;C01G23/04;C01G23/047;C01G23/08;C01G25/02;C01G99/00;C22B5/02;C22C1/04;C22F1/04;(IPC1-7):B22F9/04;C01G57/00 |
主分类号 |
B02C19/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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