3.
    发明专利
    未知

    公开(公告)号:DE69706496T2

    公开(公告)日:2002-04-25

    申请号:DE69706496

    申请日:1997-09-30

    Applicant: UBE INDUSTRIES

    Abstract: A crystalline silicon carbide fiber excellent not only in mechanical properties but also in alkali durability at high temperatures, which has a density of at least 2.7 g/cm , contains 55 to 70 % by weight of Si, 30 to 45 % by weight of C, 0.06 to 3.8 % by weight of Al and 0.06 to 0.5 % by weight of B, the total of these elements being 100 % by weight, and has a sintered structure of SiC.

    4.
    发明专利
    未知

    公开(公告)号:DE69706496D1

    公开(公告)日:2001-10-11

    申请号:DE69706496

    申请日:1997-09-30

    Applicant: UBE INDUSTRIES

    Abstract: A crystalline silicon carbide fiber excellent not only in mechanical properties but also in alkali durability at high temperatures, which has a density of at least 2.7 g/cm , contains 55 to 70 % by weight of Si, 30 to 45 % by weight of C, 0.06 to 3.8 % by weight of Al and 0.06 to 0.5 % by weight of B, the total of these elements being 100 % by weight, and has a sintered structure of SiC.

    5.
    发明专利
    未知

    公开(公告)号:DE69705274T2

    公开(公告)日:2001-10-11

    申请号:DE69705274

    申请日:1997-08-27

    Applicant: UBE INDUSTRIES

    Abstract: A silicon-carbide-based inorganic fiber not only excellent in mechanical properties but also excellent in alkali durability and heat resistance, containing at least 0.1 % by weight of a metal atom which is at least one member selected from the group consisting of metals belonging to Groups 2A, 3A and 3B of the periodic table and whose oxide exhibits amphoterism or basicity, having an oxygen content of 17 % by weight or less, having an atomic ratio of carbon to silicon (C/Si) in the range of from 1 to 1.7, and having a density of less than 2.7 g/cm .

    7.
    发明专利
    未知

    公开(公告)号:DE69819086T2

    公开(公告)日:2004-05-13

    申请号:DE69819086

    申请日:1998-07-17

    Applicant: UBE INDUSTRIES

    Abstract: A highly heat-resistant sintered SiC fiber bonded material free of a decrease in strength and less breakable at an ultra-high temperature over 1,400 DEG C, comprising inorganic fibers which are composed mainly of a sintered SiC crystal, contain at least one kind of metal atoms selected from the class consisting of metal atoms of the 2A, 3A and 3B groups of the periodic table and are bonded nearly in the close-packed structure and 1 to 50 nm boundary layers composed mainly of carbon which are present at the interface of fibers, the less breakable highly heat-resistant sintered SiC fiber-bonded material having a density of at least 2.7 g/cm and an elastic modulus of at least 200 GPa, and a process for the production thereof.

    8.
    发明专利
    未知

    公开(公告)号:DE69705274D1

    公开(公告)日:2001-07-26

    申请号:DE69705274

    申请日:1997-08-27

    Applicant: UBE INDUSTRIES

    Abstract: A silicon-carbide-based inorganic fiber not only excellent in mechanical properties but also excellent in alkali durability and heat resistance, containing at least 0.1 % by weight of a metal atom which is at least one member selected from the group consisting of metals belonging to Groups 2A, 3A and 3B of the periodic table and whose oxide exhibits amphoterism or basicity, having an oxygen content of 17 % by weight or less, having an atomic ratio of carbon to silicon (C/Si) in the range of from 1 to 1.7, and having a density of less than 2.7 g/cm .

    9.
    发明专利
    未知

    公开(公告)号:DE69819086D1

    公开(公告)日:2003-11-27

    申请号:DE69819086

    申请日:1998-07-17

    Applicant: UBE INDUSTRIES

    Abstract: A highly heat-resistant sintered SiC fiber bonded material free of a decrease in strength and less breakable at an ultra-high temperature over 1,400 DEG C, comprising inorganic fibers which are composed mainly of a sintered SiC crystal, contain at least one kind of metal atoms selected from the class consisting of metal atoms of the 2A, 3A and 3B groups of the periodic table and are bonded nearly in the close-packed structure and 1 to 50 nm boundary layers composed mainly of carbon which are present at the interface of fibers, the less breakable highly heat-resistant sintered SiC fiber-bonded material having a density of at least 2.7 g/cm and an elastic modulus of at least 200 GPa, and a process for the production thereof.

    ELECTROMAGNETIC WAVE ABSORBING MATERIAL

    公开(公告)号:CA1330704C

    公开(公告)日:1994-07-19

    申请号:CA576414

    申请日:1988-09-02

    Applicant: UBE INDUSTRIES

    Abstract: Disclosed is an electromagnetic wave absorbing structure comprising: ¢A! a composite of a plurality of laminated layers of an electromagnetic wave absorbing material comprising a fiber having a specific resistance of 10-2 to 102 .OMEGA..cm and a matrix, wherein the fiber is composed of an inorganic substance selected from the group consisting of: i) an amorphous substance substantially composed of Si, M, C and O, ii) crystalline ultrafine particles substantially composed of .beta.-SiC, C, MC, a solid solution of .beta.-SiC and MC and/or MC1-x, and having a particle diameter of not more than 500 .ANG., or alternatively, an aggregate of the crystalline ultrafine particles, amorphous SiO2 and amorphous MO2, and iii) a mixture of the above amorphous substance i) with the above crystalline ultrafine particles or aggregate ii) in which M denotes Ti or Zr, and x is a member more than 0 but less than 1, and ¢B! an electromagnetic wave transmitting material laminated on a surface of the composite ¢A!.

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