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    MOLYBDENUM CRUCIBLE
    1.
    发明申请
    MOLYBDENUM CRUCIBLE 审中-公开

    公开(公告)号：US20190071793A1

    公开(公告)日：2019-03-07

    申请号：US16079733

    申请日：2017-02-23

    Applicant: A.L.M.T. Corp.

    Inventor： Makoto Watanabe ,  Yoshitake Fukaya ,  Masahiro Katoh ,  Hidenobu Nishino

    IPC: C30B35/00 ,  C22F1/18 ,  C30B29/20

    Abstract: The ratio of the coarse grain region in the side wall in the thickness direction thereof is 10% or more and less than 90%. The coarse grain region is defined as such a region in which crystal grains having a grain size of 1 mm or more determined by an intercept method in the height direction of the crucible occupy 95% or more of an area of a measurement region, and the fine grain region is defined as such a region in which crystal grains having a grain size of 10 μm or more and 500 μm or less determined by the intercept method in the height direction of the crucible occupy 95% or more of the area of the measurement region.

    Molybdenum crucible
    2.
    发明授权
    Molybdenum crucible 有权

    公开(公告)号：US10858759B2

    公开(公告)日：2020-12-08

    申请号：US16079733

    申请日：2017-02-23

    Applicant: A.L.M.T. Corp.

    Inventor： Makoto Watanabe ,  Yoshitake Fukaya ,  Masahiro Katoh ,  Hidenobu Nishino

    IPC: C30B35/00 ,  C30B29/20 ,  C22F1/18 ,  F27B14/10 ,  F27D1/00 ,  C22F1/00 ,  B22F5/00 ,  B22F3/12 ,  C22C1/04

    Abstract: The molybdenum crucible includes a cylindrical side wall and a bottom provided integrally with one end of the side wall. The side wall includes a coarse grain region configured to extend from an outer wall toward an inner wall and a fine grain region configured to extend from the inner wall toward the outer wall so as to be in contact with the coarse grain region. The ratio of the coarse grain region in the side wall in the thickness direction thereof is 10% or more and less than 90%. The coarse grain region is defined as such a region in which crystal grains having a grain size of 1 mm or more determined by an intercept method in the height direction of the crucible occupy 95% or more of an area of a measurement region.

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