Synthetic silica glass articles and a method for manufacturing t

Details Synthetic silica glass articles and a method for manufacturing t Synthetic silica glass articles and a method for manufacturing t

1992-04-03

1994-04-12

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 54, C03C 306

Patent

active

053025563

ABSTRACT:
A synthetic silica glass article made by hydrolyzing an alkoxysilane and thermally sintering the resulting silica; this synthetic silica glass article has a viscosity of not lower than 10.sup.10 poise at 1400.degree. C., and contains, as metallic impurities, less than 1 ppm of Al, less than 0.2 ppm of Fe, less than 0.2 ppm of Na, less than 0.2 ppm of K, less than 0.01 ppm of Li, less than 0.2 ppm of Ca, less than 0.02 ppm of Ti, less than 0.01 ppm of B, less than 0.01 ppm of P, less than 0.01 ppm of As.

REFERENCES:
patent: 4243422 (1981-01-01), Lenz et al.
patent: 4747863 (1988-05-01), Clasen et al.
patent: 4798681 (1989-01-01), Oversluizen et al.

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