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AssigneeShin-Etsu Quartz Products Co., Ltd.
InventorsHiroyuki Watanabe, Akira Fujinoki, Takayuki Imaizumi, Kazuhisa Hayakawa, Shingo Niinobe
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A process for producing a transparent or opaque silica glass product including mixing a silica fine powder and a cellulose derivative and injection molding the mixture, followed by degreasing treatment and baking treatment, which is characterized in that the cellulose derivative is a cellulose derivative which causes reversible thermal gelation in an aqueous solution of at least one member selected from methyl cellulose, hydroxypropylmethyl cellulose and hydroxyethylmethyl cellulose; in producing a transparent silica glass product, the cellulose derivative is added in water heated at a gelation temperature thereof or higher, and after cooling, the formed aqueous solution is kneaded with the silica fine powder; and in producing an opaque silica glass product, the cellulose derivative is added in a silica slurry containing a silica powder and heated at a gelation temperature of the cellulose derivative or higher.
A process for producing a silica glass product including mixing a silica fine powder and a cellulose derivative, injection molding the mixture and then subjecting it to degreasing treatment, purification treatment and baking treatment, the cellulose derivative comprising a cellulose derivative which causes reversible thermal gelation in an aqueous solution.
Dependencies are inferred from the claim text.