To solve the problem of providing a black iron oxide that can yield sufficient blackness, opacifying effect and covering ability even if it is only added in a small amount for use with cosmetic materials, the invention provides a black iron oxide with a high tinting strength having an octahedral shape, a specific surface in a range of 8.0 to 20.0 m.sup.2/g, and a particle surface coated with a layer containing one type or two or more types of inorganic compounds, wherein an L* value of a colour on reduction is 31.0 or lower and a b* value of a colour on reduction is 1.5 or lower, a production method thereof, and cosmetic materials that incorporate the same.

To solve the problem of providing a black iron oxide that can yield sufficient blackness, opacifying effect and covering ability even if it is only added in a small amount for use with cosmetic materials, the invention provides a black iron oxide with a high tinting strength having an octahedral shape, a specific surface in a range of 8.0 to 20.0 m.sup.2/g, and a particle surface coated with a layer containing one type or two or more types of inorganic compounds, wherein an L*value of a color on reduction is 31.0 or lower and a b*value of a color on reduction is 1.5 or lower, a production method thereof, and cosmetic materials that incorporate the same.

The present invention provides a resin composition including aluminum oxide (A) containing molybdenum having a size on the order of m or less and a resin (B); and a resin molded body formed by molding the resin composition. Also, the present invention provides a heat-dissipating material containing the resin composition; and a heat-dissipating member containing the resin molded body. The heat-dissipating member of the present invention can be used for electronic parts such as electronic devices, electric devices, OA devices or for LED illumination.

Disclosed is a method and system for recovering at least rare earth elements from within an object A consisting of at least one first rare earth portion or a mixture of rare earth elements and a second metal portion. The method includes a solvothermal treatment step that places the object in contact with a fluid for causing at least one rare earth portion and/or mixture of rare earth elements and the metal portion to oxidize in order to separate same, the value of the reaction temperature Tr is selected according to the nature of the object, the reaction following a R-M.fwdarw.R(X)x+M(X)y scheme, where R is the rare earth element or a mixture of rare earth elements, M is the transition metal, and (X) is a group which depends on the fluid used.

A thermal method of forming ferric oxide nano/microparticles with predominant morphology is described using different solvents. Methods of using the Fe.sub.3O.sub.4 nano/microparticles as catalysts in the reduction of nitro compounds with sodium borohydride to the corresponding amines and decomposition of ammonium salts.

A thermal method of forming ferric oxide nano/microparticles with predominant morphology is described using different solvents. Methods of using the Fe.sub.3O.sub.4 nano/microparticles as catalysts in the reduction of nitro compounds with sodium borohydride to the corresponding amines and decomposition of ammonium salts.

A thermal method of forming ferric oxide nano/microparticles with predominant morphology is described using different solvents. Methods of using the Fe.sub.3O.sub.4 nano/microparticles as catalysts in the reduction of nitro compounds with sodium borohydride to the corresponding amines and decomposition of ammonium salts.

A thermal method of forming ferric oxide nano/microparticles with predominant morphology is described using different solvents. Methods of using the Fe.sub.3O.sub.4 nano/microparticles as catalysts in the reduction of nitro compounds with sodium borohydride to the corresponding amines and decomposition of ammonium salts.

Positive electrode active material particle powder includes lithium manganese oxide particle powder having Li and Mn as main components and a cubic spinel structure with an Fd-3m space group. The lithium manganese oxide particle powder is composed of secondary particles, which are aggregates of primary particles, an average particle diameter (D50) of the secondary particles being from 4 m to 20 m, and at least 80% of the primary particles exposed on surfaces of the secondary particles each have a polyhedral shape in which each (111) plane thereof is adjacent to at least one (100) plane thereof.

A thermal method of forming ferric oxide nano/microparticles with predominant morphology is described using different solvents. Methods of using the Fe.sub.3O.sub.4 nano/microparticles as catalysts in the reduction of nitro compounds with sodium borohydride to the corresponding amines and decomposition of ammonium salts.