Method of preparing tubular silica glass

Details Method of preparing tubular silica glass Method of preparing tubular silica glass

1987-07-13

1988-11-22

Lindsay, Robert L.

Glass manufacturing

Processes

Forming product or preform from molten glass

65 312, 65 17, 65 181, C03B 37023

Patent

active

047863021

ABSTRACT:
A sol-gel process for preparing dimensionally precise tubular silica glass articles wherein a solution having a specific gravity higher than the specific gravity of the sol solution is placed in a cylindrical container with the sol solution is provided. The container is rotated around its axis and the high specific gravity solution becomes aligned adjacent the inner wall of the cylindrical container due to the effect of centrifugal forces acting on the high specific gravity solution. The sol solution becomes aligned adjacent the inner surface of the high specific gravity solution. The tubular wet gel formed from the sol solution has a uniform thickness and a highly precise round cross-section. The dimensional precision of the wet gel is maintained by rotating the wet gel during drying in order to prevent warping.

REFERENCES:
patent: 3853521 (1974-12-01), Greenwood
patent: 4173459 (1979-11-01), Aulich et al.
patent: 4324576 (1982-04-01), Matsuyama et al.
patent: 4417910 (1983-11-01), Passaret
patent: 4419115 (1983-12-01), Johnson et al.
patent: 4426216 (1984-01-01), Satoh et al.
patent: 4574063 (1986-04-01), Scherer

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