Method for preparing tungsten materials
    2.
    发明授权
    Method for preparing tungsten materials 失效
    钨材料的制备方法

    公开(公告)号:US4101309A

    公开(公告)日:1978-07-18

    申请号:US732073

    申请日:1976-10-13

    IPC分类号: C22B34/36 C22C1/04 B22F1/00

    CPC分类号: C22C1/045 C22B34/36

    摘要: A method for preparing tungsten materials in which tungsten powder obtained by reducing tungsten oxides having doping agents added thereto is washed first with hydrochloric acid having a concentration of not lower than 4% by weight and then with hydrofluoric acid having a concentration of not lower than 3% by weight, and thereafter dried. The above-mentioned washing steps may be carried out at a time by using a mixture of such hydrochloric acid and hydrofluoric acid as specified above. Articles formed by treating tungsten materials obtained by the above-mentioned process are subjected to only a low high temperature deformation.

    摘要翻译: 一种制备钨材料的方法,其中通过还原添加有掺杂剂的钨氧化物获得的钨粉末首先用浓度不低于4重量%的盐酸洗涤,然后用浓度不低于3的氢氟酸 重量%,然后干燥。 上述洗涤步骤可以通过使用如上所述的这种盐酸和氢氟酸的混合物一次进行。 通过处理通过上述方法获得的钨材料形成的制品仅经受低的高温变形。

    Method of preparing silicon carbide
    4.
    发明授权
    Method of preparing silicon carbide 失效
    制备碳化硅的方法

    公开(公告)号:US4327066A

    公开(公告)日:1982-04-27

    申请号:US162819

    申请日:1980-06-25

    申请人: Motoo Seimiya

    发明人: Motoo Seimiya

    IPC分类号: C01B31/36

    CPC分类号: C01B31/36 C01P2006/80

    摘要: A method of producing silicon carbide which comprises heating silica in a gas atmosphere comprising hydrocarbon gas and hydrogen gas.

    摘要翻译: 一种生产碳化硅的方法,其包括在包含烃气体和氢气的气体气氛中加热二氧化硅。

    Method of preparing silicon carbide
    6.
    发明授权
    Method of preparing silicon carbide 失效
    制备碳化硅的方法

    公开(公告)号:US4377563A

    公开(公告)日:1983-03-22

    申请号:US358512

    申请日:1982-03-15

    申请人: Motoo Seimiya

    发明人: Motoo Seimiya

    IPC分类号: C01B31/36

    CPC分类号: C01B31/36 C01P2006/80

    摘要: A method of producing silicon carbide which comprises heating wet process white carbon in the presence of a carbon source.

    摘要翻译: 一种生产碳化硅的方法,包括在碳源的存在下加热湿法白碳。