Kobe Steel, Ltd.

Mamoru Hosokawa

Satoru Takada

Toshiki Sato

Wataru Urushihara

Hirofumi Hojo

Tomotsuna Kamijo

Sho Katsura

Kenji Yamamoto

Mikako Takeda

Jun Hisamoto

Jun Suzuki

Koji Wada

Takeshi Ohwaki

Maiko Abe

Takayuki Tsubota

A powder for a powder magnetic core, being composed of iron-base soft magnetic powder particles which each have a phosphoric acid-based chemical conversion coating on the surface. In this powder, the maximum thickness of the phosphoric acid-based chemical conversion coating is 20 to 200 nm, and recessed portions are formed on the surface of the chemical conversion coating with the total area of openings of the recessed portions being 0.5 to 50% by area relative to the total area of the observation visual fields, as determined by observing ten or more parts of the surface of the phosphoric acid-based chemical conversion coating through a scanning electron microscope with a magnification of 10000&#xd7; or more.

Powder for powder magnetic core, and powder magnetic core

Provided is an electrode material with excellent tab weldability and realizing decreased contact resistance with an active material layer. A collector (electrode material) () is provided with a metal foil substrate () and a carbon-containing conductive substance (), and is configured such that, when observed from a square viewfield with a surface area of 0.1 mm, the conductive substance () is arranged in islands on the surface of the substrate () with a 1-80% coverage ratio of the conductive substance () on the surface of the substrate ().

Electrode material and manufacturing method thereof

Provided is an anodized aluminum film formed on a surface of a substrate that comprises aluminum or an aluminum alloy, the anodized aluminum film having a structure constituted of a single anodized film layer or a structure composed of superposed anodized film layers of two or more different kinds, wherein the outermost anodized film has a degree of film formation, defined by equation (1), of 1.3 or more and the proportion of the thickness of this anodized film in the entire film thickness is 3% or higher. Thus, the anodized aluminum film is inhibited from cracking in bent portions. As a result, the substrate is inhibited from corroding in corrosive-gas atmospheres, and a decrease in withstand voltage characteristics due to film cracking is inhibited. With this anodized aluminum film, enhanced withstand voltage characteristics can hence be attained:Degree of film formation=(thickness of anodized film)/(substrate thickness loss by anodization)&#x2003;&#x2003;(1).

Anodized aluminum film

An electrode material which has excellent tab weldability, realizes reduction of a contact resistance with an active material layer, and has good adhesion with a conductive material disposed in an island shape, is provided. An electrode materialincludes a substrateincluding a metal foil and a conductive materialcontaining carbon, wherein the conductive materialis disposed in an island shape on the surface of the substratewhen observed with a visual field of 300 &#x3bc;m square, and the conductive material is fixed to the surface of the substrate together with a hydrophobic resin and a water-soluble resin.

Electrode material, electrode material manufacturing method, electrode, and secondary battery

The present invention is a laminated coating film such that at least one of each of the below mentioned coating film (Q) and coating film (R) are laminated in alternation on a substrate. [Coating film Q] At least one coating film selected from the group consisting of: a coating film having a compositional formula of TiBCNand satisfying the atom ratios of each element being 0.2&#x2266;a&#x2266;0.7, 0&#x2266;b&#x2266;0.35, and 0&#x2266;c&#x2266;0.35; a coating film having a compositional formula of SiCNand satisfying the atom ratios of each element being 0.2&#x2266;d&#x2266;0.50 and 0&#x2266;e&#x2266;0.3; and a coating film having a compositional formula of BCNand satisfying the atom ratios of each element being 0.03&#x2266;f&#x2266;0.25 and 0&#x2266;g&#x2266;0.5. [Coating film R] A coating film having a compositional formula of L(BCN) (where L is at least one element selected from the group consisting of W, Mo, and V) and satisfying the atom ratios of each element being 0&#x2266;x&#x2266;0.15 and 0&#x2266;y&#x2266;0.5.

Laminated coating film having superior wear resistance

Disclosed is an iron-based soft magnetic powder for dust core use, which includes an iron-based soft magnetic matrix powder and a phosphate conversion coating on a surface of the matrix powder. The phosphate conversion coating contains nickel element and has an aluminum content of equal to or less than that in the matrix powder. The iron-based soft magnetic powder has such excellent heat resistance as to maintain electrical insulation at satisfactory level even after subjected to a high-temperature heat treatment.

Iron-based soft magnetic powder for dust core use, manufacturing method thereof, and dust core

The present invention provides a method for forming an anode oxide film, in which on the assumption that a direct-current power source is used, a thick anode oxide film can be formed with good productivity within a short time without using special equipment. The method includes allowing a current Ato pass through an aluminum base material, and includes a step of repeating a first electricity cut-off treatment multiple times, in which when a voltage reaches a voltage Vduring the formation of the film, the passage of electricity is once cut off, this electricity cut-off is continued for a period equal to or longer than an electricity cut-off time T, and the passage of electricity is then resumed, wherein the voltage Vand electricity cut-off time Tsatisfy the prescribed expressions.

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Kobe, Japan

Mamoru Hosokawa