Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...
Patent
1988-11-15
1989-12-19
Lindsay, Robert L.
Glass manufacturing
Processes
With shaping of particulate material and subsequent fusing...
65 2, 65 311, 65 17, 65900, 65901, 156DIG108, 501 12, C03B 37016
Patent
active
048880361
ABSTRACT:
In a method of manufacturing glass bodies, in which a thixotropic suspension of SiO.sub.2 particles having a diameter in the range from 10 to 500 nm in a dispersing liquid is formed into a green body, after which the green body is purified and sintered, the suspension has a solid:dispersing liquid weight ratio of from 1:1 to 1:1.5, is passed through sieves having an aperture size in the range from 3 to 300 .mu.m under the action of sound or ultrasound, the sieved suspension is then concentrated by pumping off a part of the dispersing liquid under a vacuum and under the influence of sound or ultrasound, such that a solid:dispersing liquid weight ratio of about 1.3:1 is obtained, after which the concentrated suspension is introduced into a mould, heated to a temperature below the boiling point of the dispersing liquid to form a green body. The green body thus obtained is removed from the mould, cooled, and converted to a glass body.
REFERENCES:
patent: 4220461 (1980-09-01), Sanata
patent: 4622057 (1986-11-01), Chyung et al.
patent: 4682995 (1987-07-01), Clasen
patent: 4684385 (1987-08-01), Clasen
patent: 4684386 (1987-08-01), Clasen
patent: 4713104 (1987-12-01), Brown et al.
Fox John C.
Lindsay Robert L.
U.S. Philips Corporation
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