Highly durable silica glass, process and apparatus for...

Details Highly durable silica glass, process and apparatus for... Highly durable silica glass, process and apparatus for...

2006-06-20

2006-06-20

Lorengo, J. (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C118S718000

Reexamination Certificate

active

07064094

ABSTRACT:
Highly durable silica glass containing 0.01% to 2% by weight of at least one element selected from magnesium, calcium, strontium, barium, yttrium, hafnium and zirconium. The silica glass is produced by melting a powdery material comprising a finely divided silica powder and a finely divided zirconium-containing substance by oxyhydrogen flame or plasma are to form an accumulated molten material layer, and extending the molten material layer outwardly in radial directions.

REFERENCES:
patent: 5532195 (1996-07-01), Weiss et al.
patent: 5631522 (1997-05-01), Scott et al.
patent: 6429577 (2002-08-01), Kiryu et al.

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