Glass with noticeably improved stability to radiation...

Details Glass with noticeably improved stability to radiation... Glass with noticeably improved stability to radiation...

2007-04-24

2007-04-24

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

C065S134100, C065S134300

Reexamination Certificate

active

11030332

ABSTRACT:
A glass with high internal transmission as well as low tendency to radiation-caused physical compaction and low tendency to solarization, comprising18 to 31% by weight of SiO2,0 to 7% by weight of Na2O3,0 to 7% by weight of K2O,65 to 84% by weight of PbO,0.001 to 1% by weight of As2O3+As2O5,which is characterized by a content of0 to 5000 ppm of Sb2O30 to 500 ppm of TiO20 to 100 ppm of CuO0 to 1000 ppm of F.The Σ(As2O3, As2O5, Sb2O3, F)≧20 ppm and the ratio of As(III)/As(V) is at least 0.5. Such a glass is suitable for the use as optical element.

REFERENCES:
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Patent Abstracts of Japan; vol. 007, No. 185 (C-181), Aug. 13, 1983.
Patent Abstracts of Japan; vol. 2000, No. 9, Oct. 13, 2000.
Patent Abstracts of Japan, vol. 010, No. 071 (C-334) Mar. 20, 1986.

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