Claims
- 1. An alkali silicate solarization-stable ultraviolet glass, transmitting in the 280-500 nm range, for use as an optical filter glass, said alkali silicate glass being colored with a member selected from the group consisting of Co.sup.2+ and (Co.sup.2+ and Ni.sup.2+), consisting essentially of:
- ______________________________________SiO.sub.2 52-71% by weightPbO 2.9-16.8% by weightSnO.sub.2 0.1-1.65% by weightNa.sub.2 O 6.7-16.7% by weightK.sub.2 O 0.5-9.9% by weightNa.sub.2 O + K.sub.2 O 13.3-18.3% by weightNiO + CoO 0.1-4.4% by weightAs.sub.2 O.sub.3 + Sb.sub.2 O.sub.3 0.05-0.5% by weightRO 0-8.6% by weightB.sub.2 O.sub.3 0-8.5% by weightAl.sub.2 O.sub.3 0-0.55% by weightZnO 0-10.5% by weight______________________________________
- wherein,
- R is an element selected from the group consisting of Mg, Ca, Sr, Ba and a combination thereof.
Priority Claims (1)
Number |
Date |
Country |
Kind |
36434213 |
Dec 1986 |
DEX |
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Parent Case Info
This application is a division of application Ser. No. 136,191, filed Dec. 21, 1987, now U.S. Pat. No. 4,820,326.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
2693422 |
Duncan et al. |
Nov 1954 |
|
4520115 |
Speit et al. |
May 1985 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
399469 |
Nov 1974 |
SUX |
Divisions (1)
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Number |
Date |
Country |
Parent |
136191 |
Dec 1987 |
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