Method of making tubular polycrystalline oxide body with tapered ends
    2.
    发明授权
    Method of making tubular polycrystalline oxide body with tapered ends 失效
    制造具有锥形端部的管状多晶氧化物体的方法

    公开(公告)号:US3907949A

    公开(公告)日:1975-09-23

    申请号:US30487272

    申请日:1972-11-08

    Abstract: A single piece open ended polycrystalline oxide body having a generally tubular configuration with a smaller internal diameter at its ends than the internal diameter adjacent its mid-portion. The body is produced by isostatic pressing of prepared small uniform spherical agglomerates of the oxide powder in a urethane outer mold carrying a preshaped low melting point metal mandrel. The mandrel is removed after pressing by melting and the remaining oxide body is then sintered in a hydrogen atmosphere at high temperature to produce the polycrystalline structure.

    Abstract translation: 单件开口多晶氧化物主体,其具有大致管状的结构,其端部的内径比内部相邻其中部部分的内径小。 通过在预先形成的低熔点金属心轴的聚氨酯外部模具中均匀压制制备的氧化物粉末的小均匀球形聚集体来制造主体。 在通过熔融压制后除去芯棒,然后在氢气氛中在高温下烧结剩余的氧化物体以产生多晶结构。

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