PRODUCTION OF ARTICLE
    1.
    发明专利

    公开(公告)号:JP2001048549A

    公开(公告)日:2001-02-20

    申请号:JP2000179741

    申请日:2000-06-15

    Abstract: PROBLEM TO BE SOLVED: To produce a large-sized silica body free of crack by subjecting silica sol containing an organic surfactant whose molecular weight is specified to gelling and heat-treating the formed gel body. SOLUTION: Silica sol containing an organic surfactant having 10,000 molecular weight, containing 50% relative humidity). Further, heat treatment is carried out in order to carry out burning out of existing organic substance, dehydroxylation, removal of residual water content and sintering to provide sintered gel body suitable for overcladding tube.

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