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公开(公告)号：US20150136881A1
公开(公告)日：2015-05-21
申请号：US14401533
申请日：2013-05-24
Inventor： Hidetoshi Kitaura , Naomi Nishiki , Kazuhiro Nishikawa , Kimiaki Nakaya , Atsushi Tanaka
CPC classification number: B03C1/30 , B02C19/06 , B02C23/00 , B02C23/08 , B03C2201/18 , B82Y30/00 , B82Y40/00 , C01B32/184 , C01B32/19 , C01B32/20 , C01B2204/02
Abstract: The invention uses a dispersion (303) of suspended single-layer graphene (201), multilayer graphene (202), and graphite (203), and applies a magnetic field to the dispersion (303) to separate the single-layer graphene (201) from the dispersion (303). In the magnetic field applying step of the graphene producing method, the single-layer graphene (201), the multilayer graphene (202), and the graphite (203) are situated at different locations in solvent by using the difference in the diamagnetism strengths of the single-layer graphene (201), the multilayer graphene (202), and the graphite (203).
Abstract translation: 本发明使用悬浮单层石墨烯（201），多层石墨烯（202）和石墨（203）的分散体（303），并向分散体（303）施加磁场以分离单层石墨烯（201） ）分散体（303）。 在石墨烯制造方法的磁场施加步骤中，通过使用单层石墨烯（201），多层石墨烯（202）和石墨（203）的不同位置处于溶剂中的不同位置， 单层石墨烯（201），多层石墨烯（202）和石墨（203）。
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公开(公告)号：US11602079B2
公开(公告)日：2023-03-07
申请号：US17367279
申请日：2021-07-02
Inventor： Ryou Kuwabara , Motonori Shimamura , Naomi Nishiki , Masato Mori
Abstract: A heat sink includes a graphite plate, two base materials each of which is disposed adjacent to the graphite plate, and a fixing member, in which the graphite plate has a strip shape and includes a fin portion and a base portion provided at one end of the fin portion, the base material includes a hole into which the fixing member can be inserted, the fixing member is inserted into the holes of the two base materials so that the two base materials are disposed to be adjacent to both sides of the base portion in a thickness direction, the base portion is in close contact with the base material adjacent to each other on both sides of the base portion in the thickness direction, the adjacent base materials are crimped and fixed by the fixing member in a state of being in close contact with each other, and in a case where a surface roughness of the fin portion is defined as Ra1, a surface roughness of the base material is defined as Ra2, and a surface roughness of the base portion is defined as Ra3, a relationship of Ra1>Ra2≥Ra3 is satisfied.
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公开(公告)号：US10435607B2
公开(公告)日：2019-10-08
申请号：US15458947
申请日：2017-03-14
Inventor： Atsushi Tanaka , Naomi Nishiki , Hidetoshi Kitaura , Kimiaki Nakaya
IPC: C09K5/14 , C01B32/20 , C01B32/205 , B32B5/14
Abstract: A graphite material has a flexible part and can be utilized as a heat-conveying material in a narrow space. The graphite material, includes: at least one heat-conveying part; and a flexible part. A method for producing a graphite material, includes: (i) subjecting at least one film serving as a material to a heat treatment to obtain at least one carbonaceous film; (ii) providing a monolayer or multilayer structure including the at least one carbonaceous film; and (iii) applying heat and pressure to at least one part of the monolayer or multilayer structure in an inert atmosphere.
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Patent Agency Ranking
公开(公告)号：US10357942B2
公开(公告)日：2019-07-23
申请号：US15206264
申请日：2016-07-09
Inventor： Kazuhiro Nishikawa , Naomi Nishiki , Hidetoshi Kitaura , Atsushi Tanaka , Kimiaki Nakaya , Henrik Rønnow
Abstract: A graphite-silicon composite, including: graphite; silicon; and an intermediate layer that is located between the graphite and the silicon, wherein the intermediate layer includes oxygen, carbon and silicon. Furthermore, provided is a method for producing a graphite-silicon composite, including: layering graphite and silicon; and heating the layered graphite and silicon while applying pressure to them, wherein, during heating the layered graphite and silicon while applying pressure to them, an oxygen concentration in the atmosphere is adjusted to 0.2 vol %, the applied pressure is adjusted to 24.5 MPa or higher, and the heating temperature is adjusted to 1260° C. or higher.
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公开(公告)号：US11040883B2
公开(公告)日：2021-06-22
申请号：US15485763
申请日：2017-04-12
Inventor： Hidetoshi Kitaura , Naomi Nishiki , Atsushi Tanaka , Kimiaki Nakaya
Abstract: Provided is a graphite plate, consisting essentially of: graphite; and pores, wherein said graphite plate has a porosity from 1% to 30%. Further provided is a method for producing a graphite plate, including: applying welding pressure to at least one glass-like carbon material in a state in which said at least one glass-like carbon material is maintained in an inert atmosphere under heating conditions, to produce a graphite plate having a porosity from 1% to 30%.
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公开(公告)号：US09728784B2
公开(公告)日：2017-08-08
申请号：US14569304
申请日：2014-12-12
Inventor： Kiyohiro Hine , Naomi Nishiki , Akira Kano , Masahisa Fujimoto
IPC: H01M4/88 , H01M4/587 , C01B31/04 , H01M10/054 , H01M4/02
CPC classification number: H01M4/587 , C01B32/20 , C01B32/205 , H01M10/054 , H01M2004/021
Abstract: A method for producing a vitreous carbon material which can serve as a carbon material for a power storage device. In the method, a polymer material, having six-membered ring structures in its basic carbon skeleton and having a nitrogen atom, is heated at a temperature of 1000° C. to 2100° C. under an inert gas environment, and then, the polymer material is pulverized, to thereby control graphitization and crystal growth of the carbon material, thus producing a vitreous carbon material which serves as a carbon material for a power storage device.
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公开(公告)号：US09802206B2
公开(公告)日：2017-10-31
申请号：US14401533
申请日：2013-05-24
Inventor： Hidetoshi Kitaura , Naomi Nishiki , Kazuhiro Nishikawa , Kimiaki Nakaya , Atsushi Tanaka
CPC classification number: B03C1/30 , B02C19/06 , B02C23/00 , B02C23/08 , B03C2201/18 , B82Y30/00 , B82Y40/00 , C01B32/184 , C01B32/19 , C01B32/20 , C01B2204/02
Abstract: A dispersion of suspended single-layer graphene, multilayer graphene, and graphite is used. A magnetic field is applied to the dispersion to separate the single-layer graphene from the dispersion. By applying the magnetic field, the single-layer graphene, the multilayer graphene, and the graphite are situated at different locations in solvent by the difference in the diamagnetism strengths of the single-layer graphene, the multilayer graphene, and the graphite.
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公开(公告)号：US09746259B2
公开(公告)日：2017-08-29
申请号：US14713306
申请日：2015-05-15
Inventor： Atsushi Tanaka , Naomi Nishiki , Kazuhiro Nishikawa , Shigeki Sakaguchi , Hidetoshi Kitaura , Kimiaki Nakaya
CPC classification number: F28F21/02 , B32B7/005 , B32B27/08 , B32B27/20 , B32B2250/02 , B32B2250/24 , B32B2262/106 , B32B2305/30 , F28F21/065 , H05K9/0083 , Y10T428/24058
Abstract: A heat conductor includes a first layer containing a first resin component and first flake graphite fillers each having a basal plane; and a second layer containing a second resin component and second flake graphite fillers each having a basal plane. The heat conductor is a laminate including the first layer and the second layer, an average of first angles in the first layer is 35 degrees or smaller, each of the first angles is an acute angle between the basal plane of a corresponding one of the first flake graphite fillers and a first laminated surface of the laminate, an average of second angles in the second layer ranges from 55 degrees to 90 degrees, and each of the second angles is an acute angle between the basal plane of a corresponding one of the second flake graphite fillers and a second laminated surface of the laminate.
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