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10 条记录 (耗时 0.01 秒)

    Method for producing silica glass
    1.
    发明公开
    Method for producing silica glass 失效
    一种用于制备二氧化硅玻璃的过程。

    公开(公告)号：EP0032594A2

    公开(公告)日：1981-07-29

    申请号：EP80108254.6

    申请日：1980-12-30

    申请人： Hitachi, Ltd.

    发明人： Susa, Kenzo ,  Matsuyama, Iwao ,  Satoh, Shin ,  Suganuma, Tsuneo

    IPC分类号： C03C3/06 ,  C03B37/025 ,  C03C13/00

    CPC分类号： C03B19/12 ,  C03B37/016 ,  C03C3/06 ,  C03C2201/02 ,  C03C2203/26 ,  C03C2203/50 ,  Y10S65/901

    摘要： A method for producing silica glass wherein a dry silica gel subjected to a water desorption treatment and a carbon removal treatment is heated and has its temperature raised in an atmosphere containing chlorine, to perform a hydroxyl group removal treatment, the resultant silica gel is thereafter heated to a temperature of approximately 1,000-1,100°C in an atmosphere containing at least 1 % of oxygen, to perform a chlorine removal treatment, and the resultant silica gel is further heated do a temperature of 1,050-1,300` C in He or in vacuum, to perform a sintering treatment. The silica glass thus produced forms quite no bubble even when heated to high temperatures of or above 1300° C. Therefore, it is easy of working and it is free from the lowering of transparency attributed to the bubble formation.

    Method for producing optical glass
    2.
    发明公开
    Method for producing optical glass 失效
    Verfahren zum Herstellen optischen Glases。

    公开(公告)号：EP0029590A1

    公开(公告)日：1981-06-03

    申请号：EP80107254.7

    申请日：1980-11-20

    申请人： Hitachi, Ltd.

    发明人： Matsuyama, Iwao ,  Susa, Kenzo ,  Satoh, Shin ,  Suganuma, Tsuneo

    IPC分类号： C03B37/025 ,  C03C13/00 ,  C03B19/06 ,  C03B40/02

    CPC分类号： C01B33/163 ,  C03B19/12 ,  C03B37/016 ,  C03C3/04 ,  C03C13/045 ,  Y02P40/57 ,  Y10S65/901

    摘要： Disclosed is a method for producing optical glass, which comprises charging a mixed solution capable of forming a high-silica-content gel by hydrolysis reaction into a vessel (2), the inner wall face of which is composed of a material unwettable to the mixed solution, such as a fluorocarbon resin or silicone resin, causing gelation of the mixed solution in the vessel (2), drying the obtained gel, and heating and sintering the obtained dry gel. When electrodes are placed in the mixed solution at the gelation step and an electric voltage is applied, the time required for formation of the gel is shortened. Furthermore, at the gel-drying step, if the amount of materials evaporated from the gel is detected or the weight of the gel is measured, the detected amount of the evaporated materials or the change of the weight of the gel is fed back to a factor regulating the drying speed, such as the drying temperature to control the drying speed to an appropriate level.

    摘要翻译： 公开了一种制造光学玻璃的方法，其包括将能够通过水解反应形成高二氧化硅含量凝胶的混合溶液装入容器（2）中，所述容器（2）的内壁面由不可混合的材料 溶液，如氟碳树脂或有机硅树脂，导致容器（2）中的混合溶液凝胶化，干燥所得凝胶，并加热并烧结所获得的干凝胶。 当在凝胶化步骤中将电极置于混合溶液中并施加电压时，形成凝胶所需的时间缩短。 此外，在凝胶干燥步骤中，如果检测到从凝胶蒸发的材料的量或测量凝胶的重量，则将检测到的蒸发材料量或凝胶重量的变化反馈至 调节干燥速度的因素，如干燥温度，将干燥速度控制在适当的水平。

    Magnetic disk and process and apparatus for producing the same
    7.
    发明公开
    Magnetic disk and process and apparatus for producing the same 失效
    Magnetplatte und Verfahren und Apparat zu ihrer Herstellung。

    公开(公告)号：EP0386762A2

    公开(公告)日：1990-09-12

    申请号：EP90104451.1

    申请日：1990-03-08

    申请人： HITACHI, LTD.

    发明人： Chiba, Katsuyoshi ,  Katsumoto, Masayuki ,  Uesaka, Yasutaro ,  Fukke, Hajime ,  Ishihara, Heigo ,  Matsuyama, Iwao ,  Kodama, Naoki ,  Inoue, Hitoshi, Hitachi Daini Kyoshinryo ,  Terada, Yoshiharu, Hitachi Daiyon Kyoshinryo

    IPC分类号： G11B5/842 ,  G11B5/845

    CPC分类号： G11B5/845

    摘要： A coating type, magnetic disk is produced by applying a magnetic paint containing magnetic powders in a dispersed state to a non-magnetic substrate (3), thereby forming a magnetic recording film (100, 100′) thereon, and applying surface waves (vibrator 4) to the magnetic recording film (100, 100′) in an undried state. By applying the surface waves to the magnetic recording film (100, 100′), dispersibility and orientation of the magnetic powders are improved and a longitudinally oriented, coating type magnetic disk with distinguished electromagnetic properties, such as a high S/N ratio, etc. can be obtained.

    摘要翻译： 通过将含有分散状态的磁性粉末的磁性涂料施加到非磁性基板（3）上，从而在其上形成磁性记录膜（100,100分钟），并施加表面波（振动器 4）到未干燥状态的磁记录膜（100,100分钟）。 通过将表面波施加到磁记录膜（100,100分钟），磁粉的分散性和取向得到改善，并且具有高S / N比等的电磁特性的纵向取向的涂布型磁盘 。 可以获得。