Abstract: A method of producing a graphite product using high-temperature heat treatment is capable of producing a high-quality graphite product without using any resin as a raw material or without the need for the resin used to be a special kind of resin. The method of producing a graphite product includes a step of heat-treating a raw material at a temperature of 2400° C. or higher. The raw material contains graphene oxide (A) and optionally a resin (B). The graphene oxide (A) has a carbon-to-oxygen mass ratio (C/O) of 0.1 to 20. In the raw material, the content of the graphene oxide (A) may be from 0.3 to 20% by weight or may be from 50 to 100% by weight. The graphene oxide (A) may have an average particle size of 2 to 40 ?n.

Abstract: A graphite film has a higher degree of thermal diffusion property in one in-plane direction and a method produces the graphite film. The graphite film includes a first axial direction, which is a direction having the highest thermal diffusivity in a film surface, and a second axial direction orthogonal to the first axial direction in the film surface. A value obtained by dividing the thermal diffusivity in the first axial direction by a thermal diffusivity in the second axial direction is not less than 1.020 and not more than 1.300.

Abstract: A thin plate-shaped graphite product is produced by applying a current to an electrochemical reaction system including a graphite-containing anode, a cathode optionally containing graphite, and an electrolyte solution containing tetrafluoroboric acid or hexafluorophosphoric acid as an electrolyte. Flaky graphite is produced by subjecting the thin plate-shaped graphite product to delamination.

Abstract: A rolled graphite sheet includes a rod-shaped body and a graphite sheet having a length of 1 m or more and a width shorter than the length. The graphite sheet is wound around the rod-shaped body and is rolled in a length direction. When a length direction-end of the graphite sheet is pulled with a force of 1.5 N/cm in a direction parallel to a tangent of a cross-sectional circle of the rolled graphite sheet while fixing the rod-shaped body, the end moves 5 mm or less in the direction parallel to the tangent of the circle.

Abstract: In order to provide a thermal transport structure excellent in bendability, heat dissipation property, and lightweight property and also a thermal transport structure having a high reliability against vibrations and an excellent heat transport performance, used is a thermal transport structure (5, 201) including stacked graphite sheets (1, 213). This thermal transport structure (5, 201) includes a fixing portion (10, 202, 301) in which the stacked graphite sheets (1, 213) are fixed to each other; and a thermally conductive portion (11, 203) in which the stacked graphite sheets (1, 213) are not fixed to each other.

Abstract: Thin, highly oriented graphite of good quality can be produced by adjusting pressures to be applied to a laminate, i.e., a raw material, during the carbonizing step and during the graphitizing step.

Abstract: A method of producing a graphite film has an excellent appearance and excellent thermal diffusivity. A graphite film production method includes the steps of: preparing a polyimide film having a heating loss rate X of 0.13% to 10%, which heating loss rate X is represented by: heating loss rate X=(b?a)/a . . . Formula (1); and graphitizing the polyimide film by subjecting the polyimide film to a heat treatment. Where (i) a represents a mass of the polyimide film after the polyimide film is heated at 400° C. for 15 minutes and (ii) b represents a mass of the polyimide film after the polyimide film is heated at 150° C. for 15 minutes.

Abstract: Provided are (i) a heat transport structure which is excellent in heat transfer efficiency and (ii) a method of producing such a heat transport structure. The heat transport structure in accordance with an embodiment of the present invention includes: a first thermally conductive material in which through holes are formed; and second thermally conductive materials which are fitted in the respective through holes in a perpendicular direction which is a direction perpendicular to a surface direction, a thermal conductivity which the first thermally conductive material exhibits in the surface direction being higher than a thermal conductivity which the first thermally conductive material exhibits in the perpendicular direction, each of the second thermally conductive materials being held by an inner surface of a corresponding one of the through holes and having fitting strength of not less than 0.5 N/mm per unit circumference of the corresponding one of the through holes.

Abstract: A film includes a film body including graphite, and at least one fragment including graphite and formed on one or more surfaces of the film body. The film has a water contact angle of 50 degrees or greater and a glossiness of 20 or lower.

Abstract: A graphite film has a higher degree of thermal diffusion property in one in-plane direction and a method produces the graphite film. The graphite film includes a first axial direction, which is a direction having the highest thermal diffusivity in a film surface, and a second axial direction orthogonal to the first axial direction in the film surface. A value obtained by dividing the thermal diffusivity in the first axial direction by a thermal diffusivity in the second axial direction is not less than 1.020 and not more than 1.300.

Abstract: It is possible to obtain a graphite film with its shape controlled, by performing a sag controlling step of controlling temperatures of a polymer film at both widthwise ends and a temperature of the polymer film in a widthwise middle portion within a temperature range from a starting temperature of thermal decomposition of the polymer film to a sag controlling temperature of the polymer film.

Abstract: When a raw material graphite film bad in flatness is laminated onto another material, creases and other defects may be caused. In particular, when a graphite film having a large area is laminated, defects such as creases may be often caused. In order to solve such defects, a flatness correction treatment step is performed wherein a raw material graphite film is subjected to heat treatment up to 2000° C. or higher while a pressure is applied thereto. This flatness correction treatment gives a graphite film good in flatness. Furthermore, when the flatness of the raw material graphite film is corrected by use of a thermal expansion of a core, a graphite film small in sagging can be obtained.

Abstract: A rolled graphite sheet includes a rod-shaped body and a graphite sheet having a length of 1 m or more and a width shorter than the length. The graphite sheet is wound around the rod-shaped body and is rolled in a length direction. When a length direction-end of the graphite sheet is pulled with a force of 1.5 N/cm in a direction parallel to a tangent of a cross-sectional circle of the rolled graphite sheet while fixing the rod-shaped body, the end moves 5 mm or less in the direction parallel to the tangent of the circle.

Abstract: Provided are (i) a heat transport structure which is excellent in heat transfer efficiency and (ii) a method of producing such a heat transport structure. The heat transport structure in accordance with an embodiment of the present invention includes: a first thermally conductive material in which through holes are formed; and second thermally conductive materials which are fitted in the respective through holes in a perpendicular direction which is a direction perpendicular to a surface direction, a thermal conductivity which the first thermally conductive material exhibits in the surface direction being higher than a thermal conductivity which the first thermally conductive material exhibits in the perpendicular direction, each of the second thermally conductive materials being held by an inner surface of a corresponding one of the through holes and having fitting strength of not less than 0.5 N/mm per unit circumference of the corresponding one of the through holes.

Abstract: Use of highly oriented graphite including graphite layers placed on top of one another and containing only a small amount of water allows for production of an electronic device that includes, as an element, highly oriented graphite in which no delamination occurs, that is highly reliable in use, and that has a good heat dissipation capability.

Abstract: Provided are: a graphite composite film that reduces bubble entrapment between itself and an adherend when bonded to the adherend without impairing its heat dissipation ability; and a method for producing the graphite composite film. Specifically, provided are: a graphite composite film including a stack of a graphite film and an adhesive layer that has a projection/recess structure at its surface which faces away from the graphite film; and a method for producing the graphite composite film.

Abstract: In order to prevent positional displacement of a graphite sheet laminate during production of a resin molded product obtained by integrally molding the graphite sheet laminate and a resin, the present invention uses a graphite sheet laminate having a structure in which a first fixing layer having a modulus of elasticity of not less than 7.0×104 Pa and not more than 5.0×107 Pa at 250° C. is in contact with a graphite sheet on at least one of principal surfaces of the graphite sheet.

Abstract: The present invention provides, with use of a particular material, (i) a graphite laminate that has high thermal conductivity and that is unlikely to contain a void, (ii) a graphite laminate that is good in thermal conductivity and peel strength, (iii) methods for producing such graphite laminates, (iv) heat transport structures including such graphite laminates, (v) a rod-shaped heat transporter whose operating temperature is not limited and which can be used stably, and (vi) an electronic device including a rod-shaped heat transporter.

Abstract: There has been a problem that wrinkles easily occur on a carbonaceous film produced by the use of a continuous production method and on a graphite film obtained by heat-treating the carbonaceous film. In the present invention, heating treatment is carried out on a polymeric film while applying pressure to the polymeric film in the film thickness direction with the use of a continuous carbonization apparatus. This makes it possible to obtain a carbonaceous film and a graphite film in which wrinkling is reduced.

Abstract: In order to provide a thermal transport structure excellent in bendability, heat dissipation property, and lightweight property and also a thermal transport structure having a high reliability against vibrations and an excellent heat transport performance, used is a thermal transport structure (5, 201) including stacked graphite sheets (1, 213). This thermal transport structure (5, 201) includes a fixing portion (10, 202, 301) in which the stacked graphite sheets (1, 213) are fixed to each other; and a thermally conductive portion (11, 203) in which the stacked graphite sheets (1, 213) are not fixed to each other.