Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...
Patent
1990-04-23
1991-05-28
Lindsay, Robert L.
Glass manufacturing
Processes
With shaping of particulate material and subsequent fusing...
65901, 423338, 501 12, C03B 1906
Patent
active
050191462
ABSTRACT:
A method for producing a uniform glass of a large size without forming bubbles and holes at the bottom thereof is provided. This method comprises concentrating a sol solution obtained by hydrolysis of a metal alkoxide such as alkoxide of silicon in the presence of an organic solvent and ammonia water until a volume of the sol solution reaches 1.00-1.95 times the volume of the charged metal alkoxide, then gelling the concentrated sol solution with addition of a mixed solution of an aqueous catalyst solution and an organic solvent, then drying the gel and heating the dry gel to sinter it.
REFERENCES:
patent: 4278632 (1981-07-01), Yoldas
patent: 4397666 (1983-08-01), Mishima et al.
patent: 4605428 (1986-08-01), Johnson et al.
patent: 4680049 (1987-07-01), Onorato et al.
patent: 4801318 (1989-01-01), Toki et al.
Hoya Corporation
Lindsay Robert L.
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