Glass manufacturing – Processes – With shaping of particulate material and subsequent fusing...
Patent
1995-12-01
1997-06-24
Czaja, Donald E.
Glass manufacturing
Processes
With shaping of particulate material and subsequent fusing...
65 173, 65 175, 65 176, C03B 1901
Patent
active
056413335
ABSTRACT:
A method for forming a GeO.sub.2 -doped SiO.sub.2 glass article by depositing glass particles to form a porous preform and then drying and sintering the porous preform. A precursor of SnO.sub.2 is also present in the reactant stream used to form the particles, whereby the reaction produces particles of glass that contain GeO.sub.2, SiO.sub.2 and SnO.sub.2. The presence of SnO.sub.2 in the particles reduces the reaction of GeO.sub.2 with chlorine to form GeCl.sub.4 during the drying step. The GeCl.sub.4 that would have formed would have either escaped from the porous preform or caused GeO.sub.2 to be re-deposited in an undesirable portion of the preform. The retention of GeO.sub.2 in the article is therefore enhanced.
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Burke Gerald E.
Truesdale Carlton M.
Corning Incorporated
Czaja Donald E.
Simmons, Jr. William J.
Vincent Sean
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