Production of fine-grained particles

a technology of fine grains and metal oxides, applied in the direction of nickel compounds, lanthanide oxides/hydroxides, cobalt carbonyls, etc., can solve the problems of difficult uniform dispersion of different elements at the ultra-fine scale required for nanometre-sized grains, and the reported process used to achieve fine grain size is very expensive, so as to achieve a wide distribution of pore sizes and large specific surface areas
US20050025698A1Inactive Publication Date: 2005-02-03VERY SMALL PARTICLE CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
VERY SMALL PARTICLE CO LTD
Publication Date
2005-02-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

Particles of mixed metal oxide include at least two metal species. The particles have a grain size within the range of 1-100 nm. The particles are substantially crystalline. The particles contain only small or negligible amounts of amorphous material. The at least two metal species are uniformly dispersed in the particles.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to very fine-grained particulate material and to methods for producing such very fine-grained particulate material. In preferred aspects, the present invention relates to oxide materials of very fine-grained particulate material and to methods for producing such material. Most suitably, the particulate material has grain sizes in the nanometre scale. BACKGROUND OF THE INVENTION

[0002] Metal oxides are used in a wide range of applications. For example, metal oxides can be used in:

[0003] solid oxide fuel cells (in the cathode, anode, electrolyte and interconnect);

[0004] catalytic materials (automobile exhausts, emission control, chemical synthesis, oil refinery, waste management);

[0005] magnetic materials;

[0006] superconducting ceramics;

[0007] optoelectric materials;

[0008] sensors (eg gas sensors, fuel control for engines);

[0009] structural ceramics (eg artificial joints).

[0010] Conventional metal oxides typically hav...

Claims

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