Okayama University

Japan Science and Technology Agency

Kogakuin University

Tatsuo Fujii

Jun Takada

Makoto Nakanishi

Hideki Hashimoto

Ryoji Kanno

Mikio Takano

Takashi Sakai

Tadashi Ema

Genki Kobayashi

Hidetaka Asoh

An iron oxide powder includes a porous structure having the diameter of from 0.3 &#x3bc;m to 2 &#x3bc;m, wherein the iron oxide powder has an aluminum content of from 10 mol % to 80 mol %.

Iron oxide powder, composition, ceramics, iron oxide powder precursor, method for producing iron oxide powder precursor, and method for producing iron oxide powder

This invention relates to an anode active material comprising at least one iron oxide selected from the group consisting of amorphous iron oxides, ferrihydrite, and lepidocrocite. The invention also relates to a lithium ion secondary battery anode material comprising the anode active material as a constituent component, a lithium ion secondary battery anode comprising the lithium ion secondary battery anode material, and a lithium ion secondary battery comprising the lithium ion secondary battery anode.

Negative electrode active material and use of same

Disclosed is an organic-inorganic composite material obtained by chemically modifying a microorganism-derived ceramic material with an organic group, and a process for producing the organic-inorganic composite material. The process is characterized by reacting a microorganism-derived ceramic material with at least one compound selected from the group consisting of silane coupling agents represented by formula (1), silane coupling agents represented by formula (2), and titanate coupling agents represented by formula (3). The organic-inorganic complex can be used in applications for immobilized catalysts and immobilized enzyme catalysts.

Organic-inorganic composite material and process for producing same

This invention relates to a magnetic ceramic material comprising, as main components, (a) at least one magnetic iron oxide selected from the group consisting of FeOand &#x3b3;-FeO, and (b) an amorphous phase, and a process for producing a magnetic ceramic material, comprising (1) heating a microorganism-derived iron oxide ceramic material containing an iron atom, and (2) reducing the iron oxide ceramic material obtained in Step (1) by heating in the presence of hydrogen gas.

Magnetic ceramic and process for production thereof

The present invention provides a Y-type hexagonal ferrite thin film suitable for high frequency devices, having a crystal structure with the c-axis oriented perpendicular to the surface of the thin film. The present invention also provides a method of producing the Y-type hexagonal ferrite thin film, comprising the steps of preparing a viscous solution containing a metal-organic complex which is formed using a primary component including a Feion, and a secondary component including a Baion, at least one transition metal ion selected from the group consisting of Fe, Co, Ni, Zn, Cuand Mn; and optionally at least one metal ion selected from the group consisting of Sr, Caand Pb, forming a film having a Y-type ferrite composition on a surface made of noble metal through a coating process using the viscous solution, and burning the film at a temperature of 750&#xb0; C. or more.

Ferrite thin film for high frequency and method for preparation thereof

A method of manufacturing aluminum-substituted hematite represented by &#x3b1;-(FeAl)Owhere x=0.01 to 0.15, by mixing an iron compound and an aluminum compound such that an atomic ratio of Fe to Al falls within the range of 99:1 to 85:15, adding citric acid and ethylene glycol to the mixture of the iron compound and aluminum compound to produce a gel, and pyrolyzing the gel, followed by calcining the pyrolyzed product.

Growing community of inventors

Okayama, Japan

Tatsuo Fujii