Glass manufacturing – Processes – Sol-gel or liquid phase route utilized
Patent
1998-07-27
1999-07-06
Griffin, Steven P.
Glass manufacturing
Processes
Sol-gel or liquid phase route utilized
65395, 65440, 501 12, 501 53, 501 54, C03B 800, C03B 37016, C03B 304
Patent
active
059192801
ABSTRACT:
A method for fabricating a silica glass is provided. The method includes the steps of adding silica and a dispersant to a premix solution obtained by dissolving an acrylic resin monomer and a cross-linking agent in distilled water, dispersing the mixed solution and adjusting the pH of the mixture, to form a sol. Air bubbles are removed from the sol, and then the resultant sol is aged. A polymerization initiator and a catalyst are added to the aged sol, and the pH of the reaction mixture is adjusted. The reaction mixture is poured into a mold, and then the mixture is gelated, aged, demolded, dried, and then thermally treated to remove organic substances. Hydroxy groups are eliminated and the gel is sintered. A high purity silica glass tube, substantially free of cracking after drying and having a low shrinking ratio can be obtained. Also, a large silica glass tube can be manufactured by this fabrication method.
REFERENCES:
patent: 4426216 (1984-01-01), Satoh et al.
patent: 5240488 (1993-08-01), Chandross et al.
patent: 5292801 (1994-03-01), Avnir et al.
Baik Young-min
Oh Jeong-hyun
Griffin Steven P.
Samsung Electronics Co,. Ltd.
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