Process for the production of ultrafine powders

Mccormick, Paul Gerard and Tzuzuki, Takuya 1999, Process for the production of ultrafine powders, Other international (5) Patent WO9959754.


Title Process for the production of ultrafine powders
Creator(s) Mccormick, Paul Gerard
Tzuzuki, Takuya
Date 1999-11-25
Patent no. WO9959754
Patent owner Antaria Ltd.; Univ Western Australia
Registry Office Other international (5)
Patent family name Process for the production of ultrafine powders
Summary 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.
Notes PCT/AU99/00368
Also published as JP2002515393(T) ; IL139667(A): HK1037155(A1); EP1094910(A1):EP1094910 (A4); CN1300243 (A); CN1123415(C); CA2332013 (A1); CA2332013(C)
Language eng
Field of Research 090406 Powder and Particle Technology
HERDC Research category I.1 Patents
Persistent URL http://hdl.handle.net/10536/DRO/DU:30024831

Document type: Patent
Collection: Centre for Material and Fibre Innovation
 
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