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71. 发明专利

JPH01231077A FIXING DEVICE AND RECORDER 失效
公开(公告)号：JPH01231077A
公开(公告)日：1989-09-14
申请号：JP5609888
申请日：1988-03-11
申请人： HITACHI LTD
发明人： TANNO KIYOHIKO , MITSUYOSHI TADAHIKO , SOFUE MASAHISA , YASUTOMI YOSHIYUKI , YAMASHITA NOBUYUKI , NAGASE HIROSHI , ARIMOTO SHIYOUJI , JORAKU FUMIO , YASUI EIJI
IPC分类号： G03G15/20 , H05B3/00
摘要： PURPOSE:To enable shortening thermal time constant, to improve peeling property and thermal efficiency, as well in the heat-fixing process at a toner processes by using a heating body constituting at least a high-strength nitrogen reacted coupled ceramic composite substance. CONSTITUTION:For a fixing means in various kinds of toner processes such as electrophotography, optical printer, electrostatic recording, magnetic recording, a ceramic material composed principally of a base material of a nitrogen reacted coupled ceramic composite substance such as an Si3N4 coupled SiC ceramic composite substance 1 is used as a basic constituting material. Moreover, when conductive particles are coupled with the Si3N4 as necessary the ceramic substance becomes conductive and, when this conductive ceramic substance is integrally sintered after it is applied to the surface of the above-mentioned structure body, an excellent conductive coated film 2 can be obtained, and thus, a strong coated film for fixing can be obtained. Therefore, the thermal time constant is shortened. Moreover, since the reactive conductor is directly formed on the Ni reacted ceramic, a mold releasing agent effect utilizing homogeneous heating and the adsorption and permeability characteristics of an unglazed substance is sufficiently exerted. Accordingly, excellent pictures and a fixing property having high thermal efficiency are obtained.

72. 发明专利

JPS6449768A SLIDING MEMBER FOR SEALING 失效
公开(公告)号：JPS6449768A
公开(公告)日：1989-02-27
申请号：JP20669887
申请日：1987-08-20
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , NAKAMURA KOSUKE
IPC分类号： F16J9/28 , C04B35/565 , F16J10/00 , F16J15/34
摘要： PURPOSE:To improve abrasion resistance, corrosion resistance, and heat and shock resistances by forming the surface of one of sliding faces with a ceramic consisting of SiC and a composite material of Si3N4 containing at least one of particles and whiskers thereof and forming voids. CONSTITUTION:The surface of one of seal members 5, 6 which are slidingly brought into contact with each other of a floating seal is formed with a ceramic consisting of SiC and at least one of the particles and whiskers of Si3N4, and voids, and the mother phases 1 of the SiC and the particles 2 of the Si3N4 are allowed to mixedly exist while the void 3 is formed to be approx. 20mum or less in diameter with a porosity of approx. 15%. And, the other sliding face is formed by use of a material, e.g., Al2O3, with a hardness lower than the hardness of the particle or whisker of the Si3N4. Thereby, abrasion resistance and corrosion resistance can be improved reducing the wear of the opposite material while increasing heat resistance and shock resistance.

73. 发明专利

JPS63277576A PRODUCTION OF CERAMIC HAVING HIGH DIMENSIONAL ACCURACY AND COMPOSITION THEREOF 失效
公开(公告)号：JPS63277576A
公开(公告)日：1988-11-15
申请号：JP11055687
申请日：1987-05-08
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , NAKAMURA KOSUKE , KITA HIDENORI
IPC分类号： C04B35/65 , C04B35/584 , C04B35/80 , C04B35/81
摘要： PURPOSE:To obtain a ceramic having high strength and dimensional accuracy, by adding a thermoplastic resin binder to a metallic Si powder, compression molding the mixture under heating to form a molded article having high volume filling ratio of the powder, removing the binder with heat and thermally sintering the product in a nitriding gas atmosphere. CONSTITUTION:A binder composed of a thermoplastic resin (e.g. polyethylene) is added to metallic Si powder or an inorganic compound powder containing >=45vol.% of metallic Si powder and the mixture is kneaded under heating. The kneaded mixture is compression molded in hot state to form a molded article having a volume filling ratio of the powder of >=70vol.% and the binder in the molded article is removed with heat. The product is thermally sintered in a nitriding gas atmosphere to obtain a ceramic having high strength and dimensional accuracy and composed of particles of Si3N4 or an inorganic compound bonded with each other through particles and whiskers of Si3N4 produced from Si. The ceramic is suitable as a material for an engine, etc.

74. 发明专利

JPS63185864A COMPOSITE CERAMICS AND MANUFACTURE 失效
公开(公告)号：JPS63185864A
公开(公告)日：1988-08-01
申请号：JP21785487
申请日：1987-09-02
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , MATSUSHITA YASUO , NAKAMURA KOSUKE
IPC分类号： C04B35/584 , C04B35/56 , C04B35/58 , C04B35/591 , C04B35/80 , C04B38/06 , C22C29/00 , C22C49/00
摘要： Composite ceramic materials and a method of the same are disclosed, in which a ceramic material mainly containing silicon nitride, and at least one compound selected from a group consisting of nitrides, carbides, borides, silicides, oxides and oxynitrides of elements belonging to IIIa, IIIb, IVa, IBb, Va, VIa and VIII are combined to form a sintered body, and particles and whiskers of the ceramic material and compound are interlocked with each other and fixed so that the sintered body has a porosity of 5 to 30%. In the above composite ceramics, the particle of the compound are coupled with each other through the whisker or particle of the ceramic material. Accordingly, the composite ceramics are small in charge rate of size due to sintering, and are excellent in tenacity, heat resisting property and thermal shock resisting property. Further, the resistivity of the sintered body can be varied by changing the mixture ratio of ceramic material and compound.

75. 发明专利

JPS6330366A MANUFACTURE OF SILICON NITRIDE-SILICON CARBIDE BASE COMPOSITE MATERIAL 失效
公开(公告)号：JPS6330366A
公开(公告)日：1988-02-09
申请号：JP17160186
申请日：1986-07-23
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , NAKAMURA KOSUKE
IPC分类号： C04B35/565 , C04B35/56 , C04B35/573 , C04B35/58 , C04B35/584 , C04B35/591

76. 发明专利

JPS6321250A MANUFACTURE OF CERAMIC INJECTION FORMING COMPOSITION 失效
公开(公告)号：JPS6321250A
公开(公告)日：1988-01-28
申请号：JP16365686
申请日：1986-07-14
申请人： HITACHI LTD
发明人： WATABIKI SEIJI , NAKAMURA KOSUKE , YASUTOMI YOSHIYUKI
IPC分类号： C04B35/00

77. 发明专利

JPS62270481A CERAMICS FOR SLIDING MATERIAL 失效
公开(公告)号：JPS62270481A
公开(公告)日：1987-11-24
申请号：JP10968286
申请日：1986-05-15
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , NAKAMURA KOSUKE , WATABIKI SEIJI , KITA HIDENORI
IPC分类号： C04B41/83 , C04B41/85

78. 发明专利

JPS62223065A COMPOSITE CERAMIC SINTERED BODY 失效
公开(公告)号：JPS62223065A
公开(公告)日：1987-10-01
申请号：JP6408586
申请日：1986-03-24
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , NAKAMURA KOSUKE
IPC分类号： C04B35/565 , C04B35/56 , C04B35/58 , C04B35/584

79. 发明专利

JPS6241773A MANUFACTURE OF COMPOSITE CERAMICS 失效
公开(公告)号：JPS6241773A
公开(公告)日：1987-02-23
申请号：JP17588185
申请日：1985-08-12
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , NAKAMURA KOSUKE , WATABIKI SEIJI
IPC分类号： C04B35/622 , C04B35/00 , C04B35/80

80. 发明专利

JPS61235102A MANUFACTURE OF CERAMIC SINTERED BODY 失效
公开(公告)号：JPS61235102A
公开(公告)日：1986-10-20
申请号：JP7648785
申请日：1985-04-12
申请人： HITACHI LTD
发明人： YASUTOMI YOSHIYUKI , NAKAMURA KOSUKE , NAKAGAWA MOROO , WATABIKI SEIJI , TAGUCHI MITSUO
IPC分类号： B28B3/02 , B28B3/00

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