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1. 发明公开

EP0854765A1 PROCESS FOR THE PRODUCTION OF ULTRAFINE PARTICLES 失效
标题翻译：生产超细颗粒的方法
公开(公告)号：EP0854765A1
公开(公告)日：1998-07-29
申请号：EP96927456.0
申请日：1996-08-28
申请人： THE UNIVERSITY OF WESTERN AUSTRALIA
发明人： McCORMICK, Paul, Gerard , DING, Jun , MIAO, Wie-Fang , STREET, Robert
IPC分类号： B22F1 , B22F9 , C01F7 , C01F17 , C01G9 , C01G25 , C01G49 , C04B35 , C22B5 , C22B15 , C22B23 , C22B61 , C22C1 , C22C33 , C22C38
CPC分类号： B82Y30/00 , B22F9/005 , B22F9/04 , B22F9/20 , B22F2009/041 , C01F7/02 , C01F17/0043 , C01F17/0087 , C01G9/08 , C01G25/02 , C01G49/06 , C01P2002/72 , C01P2004/04 , C01P2004/50 , C01P2004/64 , C04B35/626 , C22B61/00 , Y10S977/81 , Y10S977/835 , Y10S977/888
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 nano-phase substance and the reaction by-product phase. The step of removing the by-product 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 nano-phase substance and the reaction by-product phase.
摘要翻译：用于生产超细颗粒的新型低成本生产工艺，该工艺基于金属化合物与合适试剂的机械活化化学反应。该方法包括使金属化合物和合适试剂的混合物进行机械活化，以增加反应物的化学反应性和/或反应动力学，从而可发生产生固体纳米相物质的化学反应。伴随而来的是，还形成了副产品阶段。该副产物相被去除，使得固体纳米相物质以超细颗粒的形式被留下。在机械活化过程中，形成复合结构，其由纳米相物质的纳米级晶粒与反应副产物相的紧密混合物组成。在机械活化之后去除副产物相的步骤可以涉及使复合结构经受溶解副产物相的合适溶剂，同时不与固体纳米相物质反应。根据本发明的方法可用于形成超细金属粉末以及超细陶瓷粉末。该方法的优点包括对超细颗粒的尺寸和尺寸分布以及在固体纳米相物质和反应副产物相之间形成的界面的性质的显着程度的控制。

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