Incubation Alliance, Inc.

Kabushiki Kaisha Kobe Seiko Sho

Kobe Steel Usa, Inc.

Kazuo Muramatsu

Masahiro Toyoda

Satoru Takada

Masami Takao

Motoharu Sato

Hidetaka Hayashi

Tsutomu Watanabe

Yoshihiko Sakashita

Yoshihiro Hara

Yoshihiko Onishi

Satoshi Shimamoto

Hideki Yamamuro

Hiroko Nagata

Kazuo Inoue

Manabu Hisada

Nobuhiro Ota

Dilip Kuchibhatla

Masago Kuwabara

Hideo Ashida

Tatsuhiro Yasaka

Akihiro Kawai

Misato Hosokawa

Nobuhiro Ohta

Takashi Nishizawa

Shunsuke Takada

The present invention provides a graphite/graphene composite material comprising flat graphite particles and graphene aggregates, wherein the flat graphite particles are stacked using the graphene aggregates as a binder so that the basal surfaces of the graphite particles are overlapped with one another, and the graphene aggregates are composed of deposited single-layer or multi-layer graphenes.

Graphite/graphene composite material, heat collector, a heat conductor, a heat dissipator, a heat-dissipation system, and a method of producing the graphite/graphene composite material

The present invention relates to a method for producing a carbon fiber that can be suitably used as a transparent conductive material for forming transparent flexible conductive films and the like, more particularly, to a method for producing a carbon fiber having an outermost surface composed of edges of graphenes, and to a carbon fiber produced by the production method. The production method comprises a step of pre-baking a fiber of an organic compound so as to contain remaining hydrogen, and a step of putting the pre-baked fiber of the organic compound in a closed vessel made of a heat resistant material and subjecting the pre-baked fiber together with the vessel to hot isostatic pressing treatment using a compressed gas atmosphere, wherein a maximum ultimate temperature in the hot isostatic pressing treatment is 1000 to 2000&#xb0; C.

Carbon fiber and method for producing same

(Problem) In conventional method for producing artificial graphite, in order to obtain a product having excellent crystallinity, it was necessary to mold a filler and a binder and then repeat impregnation, carbonization and graphitization, and since carbonization and graphitization proceeded by a solid phase reaction, a period of time of as long as 2 to 3 months was required for the production and cost was high and further, a large size structure in the shape of column and cylinder could not be produced. In addition, nanocarbon materials such as carbon nanotube, carbon nanofiber and carbon nanohorn could not be produced. (Means to solve) A properly pre-baked filler is sealed in a graphite vessel and is subsequently subjected to hot isostatic pressing (HIP) treatment, thereby allowing gases such as hydrocarbon and hydrogen to be generated from the filler and precipitating vapor-phase-grown graphite around and inside the filler using the generated gases as a source material, and thereby, an integrated structure of carbide of the filler and the vapor-phase-grown graphite is produced. In addition, nanocarbon materials are produced selectively and efficiently by adding a catalyst or adjusting the HIP treating temperature.

Carbon material and method for producing same

(Problem) In conventional method for producing artificial graphite, in order to obtain a product having excellent crystallinity, it was necessary to mold a filler and a binder and then repeat impregnation, carbonization and graphitization, and since carbonization and graphitization proceeded by a solid phase reaction, a period of time of as long as 2 to 3 months was required for the production and cost was high and further, a large size structure in the shape of column and cylinder could not be produced. In addition, nanocarbon materials such as carbon nanotube, carbon nanofiber and carbon nanohorn could not be produced. (Means to Solve) A properly pre-baked filler is sealed in a graphite vessel and is subsequently subjected to hot isostatic pressing (HIP) treatment, thereby allowing gases such as hydrocarbon and hydrogen to be generated from the filler and precipitating vapor-phase-grown graphite around and inside the filler using the generated gases as a source material, and thereby, an integrated structure of carbide of the filler and the vapor-phase-grown graphite is produced. In addition, nanocarbon materials are produced selectively and efficiently by adding a catalyst or adjusting the HIP treating temperature.

The present invention provides CNT, in particular CNT having inherent properties thereof, which has a thin wall and does not form a bundle, and an efficient production method of the CNT. The method is for producing CNT, the whole length or a part thereof is compressed to form a band, said method comprises preparing a powdery and/or particulate material of an organic compound pre-baked to an extent of containing remaining hydrogen and allowed to carry a catalyst, which may be a transition metal, other metal or other element, thereon; charging the powdery and/or particulate material of the organic compound in a closed vessel made of a heat resistant material; and subjecting the powdery and/or particulate material of the organic compound together with the vessel to hot isostatic pressing treatment using a compressed gas atmosphere, wherein a maximum ultimate temperature at the hot isostatic pressing treatment is 750 to 1200&#xb0; C.

Carbon nanotube and production method therefor

(Problem) A porous carbon material having excellent graphite crystallinity, good carrier mobility and proper porosity, a porous carbon material having edges of carbon hexagonal planes located on outer surfaces of particle and structure, and flaky graphite being similar to graphene are produced. (Means to Solve) By subjecting a carbon material, in which a closed-pore-ratio and an amount of remaining hydrogen in the material are set to be within a proper range, to hot isostatic pressing treatment, a vapor phase growth reaction of graphite is generated in closed pores as nuclei using hydrogen and hydrocarbon generated from the carbon material, thereby producing a large amount of targeted porous carbon material at low cost. Flaky graphite being similar to graphene is produced by applying physical impact to the obtained porous carbon material or by generating a graphite intercalation compound using the porous carbon material as a host and then quickly heating the compound.

There are provided a cluster of thin sheet graphite crystals or the like which is useful as an electrode material for lithium ion batteries, hybrid capacitors and the like, and a method for efficiently producing the same at high productivity. The method is one for producing a cluster of thin sheet graphite crystals composed of aggregates in such a state that thin sheet graphite crystals extend from the inside toward the outside, comprising charging a powdery and/or particulate material of an organic compound pre-baked to an extent of containing remaining hydrogen in a graphite vessel, and subjecting the powdery and/or particulate material together with the vessel to hot isostatic pressing treatment (HIP treatment) using a compressed gas atmosphere under the predetermined conditions.

The present invention provides a method of producing a multi-layer graphene-laminated substrate which comprises laminating, on a substrate surface, multi-layer graphenes from a mass of multi-layer graphenes. The method of the present invention can provide an electrically conductive film and a transparent electrically conductive film made of graphenes more easily and stably.

Method for producing multilayer graphene-coated substrate

A porous carbon material having excellent graphite crystallinity, good carrier mobility and proper porosity, a porous carbon material having edges of carbon hexagonal planes located on outer surfaces of particle and structure, and flaky graphite being similar to graphene are produced. By subjecting a carbon material, in which a closed-pore-ratio and an amount of remaining hydrogen in the material are set to be within a proper range, to hot isostatic pressing treatment, a vapor phase growth reaction of graphite is generated in closed pores as nuclei using hydrogen and hydrocarbon generated from the carbon material, thereby producing a large amount of targeted porous carbon material at low cost. Flaky graphite being similar to graphene is produced by applying physical impact to the obtained porous carbon material or by generating a graphite intercalation compound using the porous carbon material as a host and then quickly heating the compound.

The present invention provides a test dummy wafer used in the process for manufacturing a semiconductor device, which has more excellent etching resistance than a silicon wafer, and excellent mirror surface properties and evenness required for a substrate, and which causes no contamination source in the manufacturing process. The dummy wafer is composed of glassy carbon, and at least one side thereof is preferably polished to a mirror surface having a surface roughness Ra of not more than 0.005 .mu.m. The dummy wafer of the present invention has excellent characteristics as a dummy wafer for monitoring the thickness of a CVD film. The dummy wafer having specific electric resistance of not more than 0.1 .OMEGA..multidot.cm exhibits excellent characteristics as a dummy wafer for monitoring the thickness of a film formed by sputtering and confirming cleanliness.

Dummy wafer

A method for regenerating a used wafer or substrate by removing a functional coating film formed on the used wafer or substrate, comprising the steps of:

Regeneration method and apparatus of wafer and substrate

A texture treatment for a carbon substrate of a magnetic disk or for a carbon overcoat layer of a magnetic disk is effective to prevent the generation of a stiction phenomenon between a magnetic head and the surface of a magnetic disk. The texture treatment for a carbon substrate or carbon overcoat of a magnetic disk involves the steps of: preparing the carbon disk surface; forming a catalytic material layer on the surface; and performing a heat treatment of the disks in an oxidizing atmosphere. Preferably, islands of catalytic material are formed on the surface by sputtering, and a laser heat treatment is used in an oxidizing atmosphere.

Texture treatment for carbon substrate and for carbon overcoat layer of

A carbon substrate manufacturing method includes a hot molding step, a burn-carbonizing step, a hot isostatical pressure treatment step, and a mirror polishing step. In the hot molding step, molding is performed while heating thermosetting resin powders to be a hard carbon substrate after burn-carbonizing, where the thermosetting resin powders are of a particle size 150 .mu.m or more, HPF 80-150 mm, a moisture content 1.0-3.0 weight %, Fe, Ni, Si and Ca respectively 5 ppm or less. In the burn-carbonizing process, a disk shaped resin molded body is filled into a graphite cylinder and burn-carbonized by heating from the external while the condition therefor is maintained in that the disk shaped resin molded body is stacked holding therein a graphite spacer at every one sheet basis or at every plurality of sheet basis and is loaded on its top with a tungsten carbide weight, where the graphite spacer has a heat conductivity 100 kcal/m.hr..degree. C. or less, a bulk density 1.70-1.85, and a flatness degree 10 .mu.m or less.

Growing community of inventors

Kobe, Japan

Kazuo Muramatsu