High purity opaque silica glass

Details High purity opaque silica glass High purity opaque silica glass

1997-11-25

1999-11-02

Vincent, Sean

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

4283126, 501 54, 501 80, 501904, 501905, C03C 306, C03C 408, C03C 1100

Patent

active

059770007

ABSTRACT:
Opaque silica glass having a density of 2.0 to 2.18 g/cm.sup.3, sodium and potassium elements concentrations in the silica glass of each 0.5 ppm or less and an OH group concentration of 30 ppm or less, and containing bubbles which are independent bubbles having the following physical values: a bubble diameter of 300 .mu.m or less, and a bubble density of 100,000 to 1,000,000 bubbles/cm.sup.3, and a production process for opaque silica glass, including: filling quartz raw material grain having a particle size of 10 to 350 .mu.m in a heat resistant mold, heating it in a non-oxidizing atmosphere from a room temperature up to a temperature lower by 50 to 150.degree. C. than a temperature at which the above raw material grain is melted at a temperature-raising speed not exceeding 50.degree. C./minute, then, slowly heating it up to a temperature higher by 10 to 80.degree. C. than the temperature at which the quartz raw material grain is melted at the speed of 10.degree. C./minute or less, and cooling after maintaining at the above temperature.

REFERENCES:
patent: 1229324 (1917-06-01), Rosenblum
patent: 2982053 (1961-05-01), Elmer
patent: 3762936 (1973-10-01), Iler
patent: 4072489 (1978-02-01), Loxley et al.
patent: 4332907 (1982-06-01), Vieli
patent: 4332908 (1982-06-01), Vieli
patent: 4416680 (1983-11-01), Bruning et al.
patent: 4657875 (1987-04-01), Nakashima et al.
patent: 4772305 (1988-09-01), Elmer
patent: 4857092 (1989-08-01), Meerman
patent: 4963178 (1990-10-01), Brown et al.
patent: 4978641 (1990-12-01), Wada et al.
patent: 4983370 (1991-01-01), Loritsch et al.
patent: 5100841 (1992-03-01), Wada et al.
patent: 5149474 (1992-09-01), Rohatyn
patent: 5174801 (1992-12-01), Matsumura et al.
patent: 5585173 (1996-12-01), Kamo et al.

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