Metal oxide powder and method for the production of the same

a technology of metal oxide powder and method, which is applied in the direction of chromium oxide/hydrate, germanium dioxide, calcium/strontium/barium oxide/hydroxide, etc., can solve the problems of complex procedures, difficulty in obtaining raw materials, and difficulty in producing metal oxide powder containing less agglomerated particles,
US20040219087A1Inactive Publication Date: 2004-11-04MOHRI MASAHIDE +6
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MOHRI MASAHIDE
Publication Date
2004-11-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A powder of a metal oxide except for alpha -alumina, which is constituted of at least six-sided polyhedral particles and has a number-average particle diameter of 0.1-300 mu m and a particle size distribution of 10 or less in terms of D90 / D10 (wherein D10 and D90 represent the particle diameters corresponding to the cumulative amount of, respectively, 10 % and 90 % as determined from the finer particle side in the cumulative size distribution curve for the particles constituting the powder); and a powder of rutile titanium oxide constituted of at least eight-sided polyhedral particles. These powders are reduced in the content of aggregated particles and have a narrow particle size distribution and uniform particle shapes.
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Description

[0001] The present invention relates to a metal oxide powder which is used as a raw material powder of an oxide ceramic that is used as a functional material or a structural material, a metal oxide powder which is used in a dispersed state as a filler or a pigment, or a metal oxide powder which is used as a raw material powder for the production of a single crystal or for flame spray coating, and a method for the production thereof.PRIOR ART

[0002] In general, an oxide ceramic which is used as a functional material or a structural material is produced through a molding step and a calcination step from a metal oxide powder as a raw material. Properties of the metal oxide powder to be used as the raw material have a large influence on the production steps, and functions and physical properties of the ceramic product. Then, it is highly desired to provide a metal oxide powder having powder properties which are precisely controlled so that they are suitable for an intended application.[0...

Claims

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