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125 records (took 0.025 seconds)

    1.
    发明专利
    未知

    公开(公告)号：DE4223667B4

    公开(公告)日：2007-01-11

    申请号：DE4223667

    申请日：1992-07-17

    Applicant: BRIDGESTONE CORP

    Inventor： KOJIMA SHOICHI ,  MINAGAWA KAZUHIRO ,  SAITO TASUKU ,  KURACHI YASUO ,  KANO HARUYUKI

    IPC: C01B31/36 ,  C04B35/565 ,  H01L21/67

    Abstract: A process for the preparation of a beta-silicon carbide powder of high purity which is suitable for use in the manufacture of semiconductor equipment and which has a content of 1 ppm or less of each atom harmful to the manufacture of semiconductor devices. The process comprises preparing a carbon- and silicon-containing starting mixture comprising (a) at least one siliceous material selected from liquid silicon compounds and solid siliceous substances derived from a hydrolyzable silicon compound, and (b) at least one carbonaceous material selected from polymerizable or cross-linkable organic compounds prepared in the presence of a catalyst which is substantially free from atoms harmful to the manufacture of semiconductor devices. The starting mixture comprises at least one liquid substance used as component (a) or (b). The starting mixture is then solidified by heating and/or by use of a catalyst or a curing agent. The resulting solid body is optionally heat treated in a non-oxidizing atmosphere at a temperature in the range of from 500 DEG C. to 1300 DEG C. for a period sufficient to remove volatiles. The cured and optionally heat-treated body is calcined in a non-oxidizing atmosphere under conditions sufficient to give beta-silicon carbide powder.

    3.
    发明专利
    未知

    公开(公告)号：DE69128846D1

    公开(公告)日：1998-03-12

    申请号：DE69128846

    申请日：1991-04-11

    Applicant: BRIDGESTONE CORP

    Inventor： KURACHI YASUO ,  SAITO TASUKU ,  FUKUYAMA YOSHIKI ,  ENDO SHIGEKI

    IPC: C10M171/00 ,  H01B1/04 ,  H01B1/18 ,  H01B1/24 ,  H01B1/08 ,  H01B1/06

    Abstract: A powder having good oxidation resistance and controlled electrical properties is obtained by dispersing minute particulates in a matrix phase to form composite particles. The minute particulates may be distributed uniformly, or non-uniformly such that the particulates are dense near the particle surface and sparse near the centre or vice versa. The minute particulates have a moderate conductivity of from 10 to 10 Scm , and the matrix phase has a low conductivity of up to 1/10 of that of the particulates. The powder can be dispersed in an insulating oily medium to form an electrorheological fluid.

    6.
    发明专利
    未知

    公开(公告)号：DE68904031T2

    公开(公告)日：1993-04-29

    申请号：DE68904031

    申请日：1989-08-28

    Applicant: BRIDGESTONE CORP

    Inventor： ISHINO YUICHI ,  OSAKI TOSHIYUKI ,  ENDO SHIGEKI ,  TOMITA SEISUKE ,  MARUYAMA TAKAYUKI ,  FUKUYAMA YOSHIKI ,  SAITO TASUKU

    IPC: C10M171/00

    Abstract: The electroviscous fluid is a suspension composed of a finely divided dielectric solid dispersed in an electrically nonconductive oil. The viscosity of the fluid increases swiftly and reversibly under an influence of electric field applied thereto and the fluid turns to a state of plastic or solid when the influence is sufficiently strong. The electroviscous fluid of the present invention comprises 1- 60% by weight of a dispersed phase of carbonaceous particulates having average particle size of 0.01-100 micrometer, and 99-40% by weight of a continuous liquid phase of an electric insulating oil having a viscosity of 0.65-500 centistokes at room temperature. The electroviscous fluid exhibits an excellent electroviscous effect even at a high temperature with a low electric power consumption together with maintaining the improved electroviscous effect for a long period of time.

    7.
    发明专利
    未知

    公开(公告)号：DE68904031D1

    公开(公告)日：1993-02-04

    申请号：DE68904031

    申请日：1989-08-28

    Applicant: BRIDGESTONE CORP

    Inventor： ISHINO YUICHI ,  OSAKI TOSHIYUKI ,  ENDO SHIGEKI ,  TOMITA SEISUKE ,  MARUYAMA TAKAYUKI ,  FUKUYAMA YOSHIKI ,  SAITO TASUKU

    IPC: C10M171/00

    Abstract: The electroviscous fluid is a suspension composed of a finely divided dielectric solid dispersed in an electrically nonconductive oil. The viscosity of the fluid increases swiftly and reversibly under an influence of electric field applied thereto and the fluid turns to a state of plastic or solid when the influence is sufficiently strong. The electroviscous fluid of the present invention comprises 1- 60% by weight of a dispersed phase of carbonaceous particulates having average particle size of 0.01-100 micrometer, and 99-40% by weight of a continuous liquid phase of an electric insulating oil having a viscosity of 0.65-500 centistokes at room temperature. The electroviscous fluid exhibits an excellent electroviscous effect even at a high temperature with a low electric power consumption together with maintaining the improved electroviscous effect for a long period of time.

    ELECTROVISCOUS FLUID
    9.
    发明专利
    ELECTROVISCOUS FLUID 未知

    公开(公告)号：CA2000322C

    公开(公告)日：1997-08-19

    申请号：CA2000322

    申请日：1989-10-06

    Applicant: BRIDGESTONE CORP

    Inventor： MARUYAMA TAKAYUKI ,  SAITO TASUKU ,  ISHINO YUICHI ,  FUKUYAMA YOSHIKI ,  TOMITA SEISUKE ,  ENDO SHIGEKI ,  OSAKI TOSHIYUKI

    IPC: C10M171/00 ,  C10M171/06 ,  H01B3/46

    Abstract: The electroviscous fluid is a suspension composed of a finely divided dielectric solid dispersed in an electrically nonconductive oil. The viscosity of the fluid increases swiftly and reversibly under an influence of electric field applied thereto and the fluid turns to a state of plastic or solid when the influence is sufficiently strong. The electroviscous fluid of the present invention comprises 1-60% by weight of a dispersed phase of carbonaceous particulates having average particle size of 0.01-100 micrometer, and 99-40% by weight of a continuous liquid phase of an electric insulating oil having a viscosity of 0.65-500 centistokes at room temperature. The electroviscous fluid exhibits an excellent electroviscous effect even at a high temperature with a low electric power consumption together with maintaining the improved electroviscous effect for a long period of time.

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