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1. 发明专利

JPH04207903A PRODUCTION OF CARBON MATERIAL FOR SLIDING CURRENT COLLECTION 失效
公开(公告)号：JPH04207903A
公开(公告)日：1992-07-29
申请号：JP33079990
申请日：1990-11-30
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP , RAILWAY TECHNICAL RES INST , TOUHOKU KYOWA KAABON KK
发明人： FUJIMOTO KENICHIRO , MUKAI KOICHIRO , FUJIMOTO KENICHI
IPC分类号： C04B35/52 , B60L5/00
摘要： PURPOSE:To obtain a carbon series sliding current collecting material having high strength, low electric resistance and high resistance to brittle fracture by a method wherein a carbonaceous powder material is admixed with specific quantity of metallic fibers and then it is molded and sintered and further subjected to heat treatment. CONSTITUTION:Metallic fibers are admixed by 5-60vol.%, preferably 10-45vol.%, for the total of a carbonaceous powder material and the metallic fibers. When it is lower than 5vol.% electric resistance does not decrease sufficiently whereas when it is higher than 60vol.% the carbonaceous powder material is not sintered sufficiently thus causing decrease of strength. Thus obtained mixture material is then molded or subjected to cold hydrostatic press and sintered at a temperature lower than the melting point of the metallic fiber under an environment of inert gas such as argon or nitrogen thus carbonizing the mixture material. It is further subjected to heat treatment for quenching the metallic fibers.

2. 发明专利

JPH03252357A PRODUCTION OF CARBON MATERIAL FOR SLIDING CURRENT COLLECTION 失效
公开(公告)号：JPH03252357A
公开(公告)日：1991-11-11
申请号：JP4753990
申请日：1990-02-28
申请人： NIPPON STEEL CHEMICAL CO , RAILWAY TECHNICAL RES INST , NIPPON STEEL CORP , TOUHOKU KYOWA KAABON KK
发明人： FUJIMOTO KENICHIRO , MUKAI KOICHIRO , FUJIMOTO KENICHI , TSUCHIYA HIROSHI , OGATA NOBUYOSHI
IPC分类号： C04B35/52 , B60L5/00 , B60L5/04 , C04B35/76 , H02K13/00
摘要： PURPOSE:To obtain a high-strength carbonaceous material for sliding current collection having a low electrical resistance and resistance to brittle fracture by mixing raw coke with a specific amount of metal fiber, then forming the resultant mixture and burning the formed compact. CONSTITUTION:With raw coke, is added and mixed 25-60vol.% metal fiber. The resultant mixture is then formed and burned to provide the objective carbon material. Pulverized raw coke itself containing a binder component is suitable as a carbonaceous raw material to be used. A large amount of the metal fiber can be added only by using the aforementioned raw material. For example, methods for heating pitch such as petroleum-based or coal-based pitch in an inert gas stream under ordinary pressure and regulating volatile contents or regulating the volatile contents according to vacuum distillation are cited as a method for producing the above-mentioned raw coke. If it is desired to further improve sliding characteristics, a carbonaceous raw material containing graphite powder dispersed in a carbonaceous matrix composed of the raw coke is effectively used.

3. 发明专利

JPH04207902A PRODUCTION OF CARBON MATERIAL FOR SLIDING CURRENT COLLECTION 失效
公开(公告)号：JPH04207902A
公开(公告)日：1992-07-29
申请号：JP33079890
申请日：1990-11-30
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP , RAILWAY TECHNICAL RES INST , TOUHOKU KYOWA KAABON KK
发明人： FUJIMOTO KENICHIRO , MUKAI KOICHIRO , FUJIMOTO KENICHI
IPC分类号： C04B41/88 , B60L5/00 , C04B35/52
摘要： PURPOSE:To obtain a highly strong carbon series sliding current collecting material having low electric resistant and high resistance to brittle fracture by a method wherein a carbonaceous powder material is added with specific quantity of metallic fibers and admixed and then it is molded or subjected to hydrostatic press and sintered followed by impregnation with a metal having melting point lower than that of the admixed metallic fibers. CONSTITUTION:Metallic fibers are admixed by 5vol.%-60vol.%, preferably, 10-45vol.%, for the total of carbonaceous powder material and the metallic fibers. When it is lower than 5vol.% electric resistance does not decrease sufficiently whereas when it is higher than 60vol.% the carbonaceous material is not sintered sufficiently thus causing drop of strength. Thus obtained mixture material is then molded or subjected to hydrostatic press and sintered at a temperature lower than the melting point of the metallic fiber under environment of inert gas such as argon or nitrogen thus carbonizing the mixture material. It is then subjected to metal impregnation. The impregnating metal must have melting point lower than that of the admixed metallic fiber.

4. 发明专利

JPH04207904A PRODUCTION OF CARBON MATERIAL FOR SLIDING CURRENT COLLECTION 失效
公开(公告)号：JPH04207904A
公开(公告)日：1992-07-29
申请号：JP33080090
申请日：1990-11-30
申请人： NIPPON STEEL CHEMICAL CO , NIPPON STEEL CORP , RAILWAY TECHNICAL RES INST , TOUHOKU KYOWA KAABON KK
发明人： FUJIMOTO KENICHIRO , MUKAI KOICHIRO , FUJIMOTO KENICHI
IPC分类号： C04B35/52 , B28B3/00 , B60L5/00
摘要： PURPOSE:To obtain a carbon series sliding current collecting material having high strength, low electric resistance and high resistance to brittle fracture by admixing a carbonaceous powder material with specific quantity of metallic fibers, molding the mixture material through cold hydrostatic press and then baking. CONSTITUTION:Metallic fibers are admixed by 5-60vol.%, preferably 10-45vol.%, for the total of a carbonaceous powder material and the metallic fibers. When it is lower than 5vol.% electric resistance does not decrease sufficiently whereas when it is higher than 60vol.% the carbonaceous powder material is not sintered sufficiently thus causing decrease of strength. Thus produced mixture material is then molded through cold hydrostatic press. It is then baked at a temperature lower than the melting point of the metallic fiber under an environment of inert gas such as argon or nitrogen thus producing a sliding current collecting material.

5. 发明专利

JPH04187564A PRODUCTION OF OXIDATION-RESISTANT HIGH-DENSITY CARBON MATERIAL 失效
公开(公告)号：JPH04187564A
公开(公告)日：1992-07-06
申请号：JP31601890
申请日：1990-11-22
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： OKUBO SHUICHI , ORITA MASAFUMI , MUKAI KOICHIRO , FUJIMOTO KENICHI
IPC分类号： C04B35/52 , C01B31/02 , C01B31/04
摘要： PURPOSE:To obtain a carbon material having excellent oxidation resistance and purity by crushing raw coke having a volatile content falling within a prescribed range, forming the powder without using a binder, baking and carbonizing the formed material and graphitizing the product. CONSTITUTION:A raw coke having a volatile content of 10.5-14.0wt.% and a crushing strength of 21-30% is produced by heat-treating a heavy oil (e.g. de-QI pitch) in a non-oxidizing atmosphere at 400-500 deg.C. The coke is crushed to an average particle size of 5-30mum, formed with a mold press, etc., without using a binder, baked and carbonized in a non-oxidizing atmosphere (e.g. Ar) at 1000-1200 deg.C and graphitized at 2000-3000 deg.C.

6. 发明专利

JPH03290309A PRODUCTION OF CARBONACEOUS PRECURSOR 失效
公开(公告)号：JPH03290309A
公开(公告)日：1991-12-20
申请号：JP9017990
申请日：1990-04-06
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： ORITA MASAFUMI , OKUBO SHUICHI , MUKAI KOICHIRO , FUJIMOTO KENICHI
IPC分类号： C01B31/00 , C01B31/02 , C01B31/04 , C04B35/52
摘要： PURPOSE:To obtain the subject high-quality carbonaceous precursor suitable for a wide range of carbonaceous material use in a high yield by blending heavy oil with a specified amount of a carbonization auxiliary consisting of an aromatic compound compatible the with and heat treating the resultant mixture at a prescribed temperature and the ordinary pressure and in an inert gas atmosphere. CONSTITUTION:With 100 pts.wt. heavy oil such as coal tar, 1-45 pts.wt. carbonization auxiliary consisting of an aromatic compound compatible therewith is blended. As the concrete example of the carbonization auxiliary, dinitrobenzene, dinitronaphthalene, nitroanilinesulfonic acid, etc., are exemplified. The resultant mixture is then heat treated at 200-540 deg.C, at the ordinary pressure and in an inert gas (e.g. argon) atmosphere to obtain the objective carbonaceous precursor. Using the carbonaceous precursor, a graphite material having a stable quality, a high density, a high strength and an excellent conductivity can be produced.

7. 发明专利

JPH03261613A FILM FORMATION OF HARD CARBON FILM 失效
公开(公告)号：JPH03261613A
公开(公告)日：1991-11-21
申请号：JP6007390
申请日：1990-03-13
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： OKADA MORIHIRO , KONO TAKUMI , SATO MAKI , FUJIMOTO KENICHI
IPC分类号： C01B31/02 , C01B31/06 , C23C14/32
摘要： PURPOSE:To make hard carbon into a thick film at high speed by simultaneously irradiating a substrate with an ion beam of carbon source and an ion beam of hydrogen under a specified condition of accelerated electric field energy by using different ion sources. CONSTITUTION:A carbon ion source 2 and a hydrogen ion source 3 are prepared separately and a magnetic field source 1 is laid at the back side of a substrate 4. The substrate 4 is simultaneously irradiated with an ion beam of carbon source and an ion beam of hydrogen from both the ion sources 2 and 3. In the irradiation, accelerated electric field energy of the ion beam of hydrogen is made equal to or lower than the accelerating electric field energy of the carbon ion beam.

8. 发明专利

JPH02284989A PRODUCTION OF NEEDLE COKE 失效
公开(公告)号：JPH02284989A
公开(公告)日：1990-11-22
申请号：JP10684989
申请日：1989-04-26
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： SHIBATA KAZUYA , FUJIMOTO KENICHI
IPC分类号： C10B57/04
摘要： PURPOSE:To obtain high-grade needle coke, having a low thermal expansion coefficient and usable as a raw material for artificial graphite electrodes by heat-treating coal tar pitch free of portions insoluble in quinoline under specific conditions and then removing the formed mesophase. CONSTITUTION:The objective needle coke obtained by heat-treating coal tar pitch free of portions insoluble in quinoline under conditions of 350-450 deg.C temperature and 1-10kg/cm pressure in an atmosphere in the absence of molecular oxygen, forming a mesophase in an amount of 2-30 pts.wt. (preferably 3-20 pts.wt.) based on 100 pts.wt. above-mentioned coal tar pitch, settling the aforementioned mesophase, then separating the supernatant liquid by decantation and carrying out delayed coking of the above-mentioned liquid.

9. 发明专利

JPH02213752A METHOD AND INSTRUMENT FOR MEASURING STRUCTURE OF OPTICALLY ANISOTROPIC MATERIAL 失效
公开(公告)号：JPH02213752A
公开(公告)日：1990-08-24
申请号：JP3366989
申请日：1989-02-15
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： HIGUCHI MASAKAZU , SUNAGO HIROFUMI , TOMIOKA NORIO , FUJIMOTO KENICHI
IPC分类号： G01N21/21
摘要： PURPOSE:To measure the structure in the orientation direction of the optically anisotropic material by changing the direction of the oscillation plane of polarized light with respect to the anisotropic material and measuring the quantity of the transmitted or reflected light. CONSTITUTION:The reflectivity of graphite having a laminated structure has the anisotropy when, for example, the graphite belonging to the optical negative crystal of a hexagonal system is observed by a reflection method. The max. reflectivity Romega is exhibited in the direction parallel with the direction of lamination of, for example, the face A. The min. reflectivity Repsilon is exhibited in the direction perpendicular to the direction of the lamination. The max. reflectivity Romega is exhibited in the all directions with the face B. The intermediate reflectivity Repsilon' which is between Romega and Repsilon is exhibited on the face C diagonal to the lamination direction. the max. reflectivity Romega is exhibited in the direction parallel with the lamination direction on this face as well. The direction where the max. reflectivity Romega is exhibited indicates always the direction of lamination in such a manner. The structure of the optically anisotropic material is, therefore, measured by changing the direction of the oscillation of the polarized light, measuring the quantity of the transmitted or reflected light, dividing the measuring face to plural picture elements, and detecting the orientability of the structure in accordance with the change in the light quantity of the respective picture elements.

10. 发明专利

JPH0269308A PRODUCTION OF CRUDE PITCH COKE AND ISOTROPIC HIGH DENSITY CARBON MATERIAL 失效
公开(公告)号：JPH0269308A
公开(公告)日：1990-03-08
申请号：JP21828188
申请日：1988-09-02
申请人： NIPPON STEEL CORP , NIPPON STEEL CHEMICAL CO
发明人： MUKAI KOICHIRO , ORITA MASAFUMI , FUJIMOTO KENICHI , MATSUNAGA HIROYUKI , YAMAMOTO AKIO
IPC分类号： C04B35/52 , C01B31/00 , C01B31/04
摘要： PURPOSE:To obtain crude pitch coke having a low content of impurities and fine texture and being suitable as a raw material for an isotropic high density carbon material by a simple and inexpensive process by adding fine powder of a carbonaceous material to coal tar pitch contg. no quinoline insolubles, kneading the mixture and charging the mixture to a pipe furnace, and heating by a specified method. CONSTITUTION:Fine carbon powder

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