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    1.
    发明专利
    未知

    公开(公告)号：DE2535791A1

    公开(公告)日：1976-03-18

    申请号：DE2535791

    申请日：1975-08-11

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： KOBAYASHI KAZUO ,  OGAWA ICHITARO ,  HONDA HIDEMASA ,  MATSUSHITA YASUHIRO

    IPC: C01B31/04 ,  C04B35/52 ,  C04B35/528 ,  C04B35/54 ,  C04B35/64

    Abstract: A process for the production of shaped articles of high density graphite having excellent mold-releasing property which comprises incorporating amorphous carbon powder such as powdery coke or artificial graphite powder with about 3-20% by weight of boric acid or boron oxide as a sintering-promoting agent, and baking the mixture under a pressure of 150-500 kg/cm2 without the aid of a binding agent such as pitch. Shaped articles of high density graphite possessing excellent mechanical strength are obtained by this process.

    NEUTRON SHIELDING CARBON MATERIAL
    2.
    发明专利
    NEUTRON SHIELDING CARBON MATERIAL 失效

    公开(公告)号：JPH042659A

    公开(公告)日：1992-01-07

    申请号：JP10093990

    申请日：1990-04-16

    Applicant: AGENCY IND SCIENCE TECHN ,  KOBE CAST IRON WORKS

    Inventor： OGAWA ICHITARO ,  YOSHIDA HISAYOSHI ,  NISHIKAWA SUSUMU ,  OSHIMA MASAAKI

    IPC: G21F1/08 ,  C01B31/02 ,  C04B35/52

    Abstract: PURPOSE:To obtain a neutron shielding carbon material having excellent strength and thermal conductivity, comprising a sintered material of a mixture of fresh coke powder, boron nitride powder and metal power or ceramic powder as a component. CONSTITUTION:A carbon material comprising a sintered material of a powder mixture of 50-90vol.% fresh coke powder, 10-49vol.% boron nitride powder and 0.5-4vol.% metal power or ceramic powder. The metal powder used is a metal of group IVa, group Va, group VIa and group VIII of the periodic table and the ceramic powder is boride or carbide of the metal. The fresh coke may be either petroleum-based coke or coal-based coke and coke which is produced at relatively low temperature of =10wt.% residual volatile content is preferable as the fresh coke.

    GROWTH OF GRAPHITE PARTICLE IN CARBON-BASED MOLDED PRODUCT
    3.
    发明专利
    GROWTH OF GRAPHITE PARTICLE IN CARBON-BASED MOLDED PRODUCT 失效

    公开(公告)号：JPH1081564A

    公开(公告)日：1998-03-31

    申请号：JP28474696

    申请日：1996-08-30

    Applicant: AGENCY IND SCIENCE TECHN

    Inventor： OGAWA ICHITARO

    IPC: C04B35/52 ,  C01B31/04

    Abstract: PROBLEM TO BE SOLVED: To provide a method for growing graphite particles in a carbon-based molded product by adding specific elements or their compounds to the molded product consisting mainly of the carbon or the carbon precursor and subsequently thermally treating the mixture. SOLUTION: This method for growing graphite particles in a carbon-based molded product comprises simultaneously adding Al (compound) and B (compound), preferably aluminum diboride, to a molded product consisting mainly of carbon or a carbon precursor (e.g. raw coke) and subsequently thermally treating the mixture in a graphite oven in the atmosphere of highly pure argon. When graphite is added to a carbon material or its composite materials to improve the characteristics of the carbon by a conventional method, an objective amount of graphite particles must be first added to the material. However, the method for producing and growing the graphite particles in the carbon molded product or carbon-based molded product not containing the graphite particles or containing a small amount of the graphite particles is thus obtained.

    GRAPHITE-BASED COMPOSITE SLIDING MEMBER
    4.
    发明专利
    GRAPHITE-BASED COMPOSITE SLIDING MEMBER 失效

    公开(公告)号：JPH07247167A

    公开(公告)日：1995-09-26

    申请号：JP4913191

    申请日：1991-02-21

    Applicant: AGENCY IND SCIENCE TECHN ,  OILES INDUSTRY CO LTD

    Inventor： MIYAZAKI KENJI ,  OGAWA ICHITARO ,  YOSHIDA HISAYOSHI ,  KASHIMA KAZUTSUGU ,  MINO KATSUMI

    IPC: F16C33/24 ,  C04B35/52 ,  F16C33/44 ,  F16C33/56

    Abstract: PURPOSE:To obtain a graphite-based composite sliding member excellent in graphite film formability on the surface of the other party member even under raised sliding speed, and improved in frictional/wear characteristics, by sintering a composition comprising carbon powder, boron or boron carbide powder and calcium fluoride powder. CONSTITUTION:This sliding member is obtained by sintering a composition comprising carbon powder, pref. 5-35wt.%, based on the whole weight of the final sliding member, in terms of boron, of boron or boron carbide, and pref. 3-20wt.% of calcium fluoride powder. The carbon powder is e.g. at least one kind selected from amorphous carbon powder such as calcinated coke, carbon black and resin coal, carbonaceous powder such as raw coke, bulk mesophase and mesocarbon microbeads and graphitic carbon powder such as of artificial graphite, kish graphite and natural graphite.

    MATERIAL FOR GLASS PRODUCT MOLDING MEMBER
    5.
    发明专利
    MATERIAL FOR GLASS PRODUCT MOLDING MEMBER 失效

    公开(公告)号：JPH01234366A

    公开(公告)日：1989-09-19

    申请号：JP6300388

    申请日：1988-03-15

    Applicant: AGENCY IND SCIENCE TECHN ,  NIPPON TUNGSTEN

    Inventor： OGAWA ICHITARO ,  YOSHIDA HISAYOSHI ,  KOBAYASHI KAZUO ,  TAKASHIMA YOSHIO

    IPC: C03B9/44 ,  C03B9/48 ,  C03B40/00 ,  C04B35/52

    Abstract: PURPOSE:To obtain the title material being difficult to fuse to and react with molten glass, having excellent oxidation resistance, and free of cracking by incorporating carbide powder into coke powder contg. more than a specified amt. of residual volatile matter. CONSTITUTION:The material consists of 60-98vol.% coke powder having >=4wt.% residual volatile matter, when the apparent density is found to be 1.35g/cm , and the balance sintered body of carbide powder. The carbide of groups IVa, Va and VI metal, B4C, and SiC are preferably used as the carbide. The coke produced at a relatively low temp. of =4wt.%. When the residual volatile matter is less than 4wt.%, the mechanochemical effect by milling is insufficient, the product is not densified, and a high-strength material is not obtained.

    CARBON MATERIAL HAVING SUPERIOR ELECTRIC CONDUCTION AND HIGH STRENGTH
    7.
    发明专利
    CARBON MATERIAL HAVING SUPERIOR ELECTRIC CONDUCTION AND HIGH STRENGTH 失效

    公开(公告)号：JPS6442364A

    公开(公告)日：1989-02-14

    申请号：JP19784287

    申请日：1987-08-07

    Applicant: AGENCY IND SCIENCE TECHN ,  KOBE CAST IRON WORKS

    Inventor： OGAWA ICHITARO ,  YOSHIDA HISAYOSHI ,  KOBAYASHI KAZUO ,  NISHIKAWA SUSUMU

    IPC: C04B35/52

    Abstract: PURPOSE:To produce a carbon material having superior electric conduction, oxidation resistance and high strength by mixing an SiC powder, B4C powder, TiC powder and/or ZrC powder, and raw coke powder with the specific ratios, and sintering the mixture. CONSTITUTION:The basic component is a mixture of 5-50vol.% carbide powders consisting of silicon carbide and boron carbide and a remaining portion of raw coke powder. The above carbide powders are replaced by 3-80wt.% to the total with the ceramic powders consisting of carbide powders of titanium and/or zirconium to prepare the powder mixture. Then, this powder mixture is sintered to form a carbon material. This carbon material is suitable for the application requiring a superior electric conduction and also a high strength in an elevated temperature region, and is available for electric- and electronic- parts materials, mechanical-parts materials, etc.

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