Method for molding a fused quartz glass block

Details Method for molding a fused quartz glass block Method for molding a fused quartz glass block

1981-10-05

1982-11-09

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

Operating under inert or reducing conditions

65 33, 65 63, 65102, 65112, C03B 2902, C03B 1100

Patent

active

043583067

ABSTRACT:
The invention provides a method for molding a block of a fused quartz glass by the plastic deformation of a starting block with smaller dimensions at a high temperature. The molding procedure is carried out in a graphite mold under compression at a temperature of 1700.degree. C. or higher in an atmosphere of helium at a pressure in the range, preferably, from 50 to 500 Torr. The cooling schedule as specified is also of importance in order that the molded quartz glass block is freed from any strain or cracks.

REFERENCES:
patent: 2852891 (1958-09-01), George
patent: 3128166 (1964-04-01), Hohn
patent: 3214254 (1965-10-01), Remington
patent: 3243274 (1966-03-01), Kolbe
patent: 4139677 (1979-02-01), Blair et al.

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