发明名称 |
PROCESS FOR THE PRODUCTION OF ULTRAFINE PARTICLES |
摘要 |
A new, cost effective process for the production of ultrafine particles which is based on mechanically activated chemical reaction of a metal compound with a suitable reagent. The process involves subjecting a mixture of a metal compound and a suitable reagent to mechanical activation to increase the chemical reactivity of the reactants and/or reaction kinetics such that a chemical reaction can occur which produces a solid nano-phase substance. Concomitantly, a by-product phase is also formed. This by-product phase is removed so that the solid nano-phase substance is left behind in the form of ultrafine particles. During mechanical activation a composite structure is formed which consists of an intimate mixture of nano-sized grains of the nanophase substance and the reaction by-product phase. The step of removing the byproduct phase, following mechanical activation, may involve subjecting the composite structure to a suitable solvent which dissolves the by-product phase, while not reacting with the solid nano-phase substance. The process according to the invention may be used to form ultrafine metal powders as well as ultrafine ceramic powders. Advantages of the process include a significant degree of control over the size and size distribution of the ultrafine particles, and over the nature of interfaces created between the solid nanophase substance and the reaction by-product phase.
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申请公布号 |
CA2230443(A1) |
申请公布日期 |
1997.03.06 |
申请号 |
CA19962230443 |
申请日期 |
1996.08.28 |
申请人 |
THE UNIVERSITY OF WESTERN AUSTRALIA |
发明人 |
MIAO, WIE-FANG;MCCORMICK, PAUL GERARD;STREET, ROBERT;DING, JUN |
分类号 |
B22F1/00;B22F9/00;B22F9/04;B22F9/16;B22F9/20;C01F7/02;C01F17/00;C01G9/08;C01G25/02;C01G49/06;C04B35/10;C04B35/48;C04B35/50;C04B35/622;C04B35/626;C22B5/02;C22B5/04;C22B15/00;C22B23/02;C22B61/00;C22C1/04;C22C33/02;C22C38/08;(IPC1-7):B22F9/16;C22C1/00 |
主分类号 |
B22F1/00 |
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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