Optical quality colored glass

Details Optical quality colored glass Optical quality colored glass

1985-04-17

1986-10-07

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 47, 501 48, 501 73, 501 78, C03C 3247, C03C 319, C03C 317, C03C 3068

Patent

active

046159894

ABSTRACT:
An optical CuO-bearing, alkali- and alkaline-earth rich phosphate glass with relatively high elongation (at 20.degree.-300.degree. C. from 110.times.10.sup.-7 grd.sup.-1 to 138.times.10.sup.-7 grd.sup.-1) and a transformation range .ltoreq.380.degree. C., with substantially improved transmission in the UV to blue range of the spectrum (UV-transmission at .lambda.=350 nm between .gtoreq.69% and .gtoreq.83%) and a very strong absorption in the red region of the spectrum (IR-absorption at .lambda.=700 nm between .ltoreq.2% and .ltoreq.12%), consisting essentially of the following synthesis/composition, in wt. %: P.sub.2 O.sub.5 65-70%; SiO.sub.2 0-0.75%; B.sub.2 O.sub.3 0-2%; A.sub.2 O.sub.3 2.5-6%; R.sub.2 O (alkali metal oxides) 11-17%; BaO 3-9.5%; CeO.sub.2 0.45-2.0%; CuO 2.55-6.55%; Cl.sup.- 0.15-0.75%; F.sup.- 0.25-1.50%; refining agent 0.10-2.00% with .SIGMA.CeO.sub.2 +Al.sub.2 O.sub.3 +BaO+CuO.gtoreq.8.5 and .SIGMA.R.sub.2 O=F.sup.- +Cl.sup.- .gtoreq.21.5; optionally further containing CaO, MgO, SrO, ZnO and/or CdO.

REFERENCES:
patent: 3923527 (1975-12-01), Matsuura et al.
patent: 4110245 (1978-08-01), Yamashita
patent: 4217382 (1980-08-01), Toratani
patent: 4297142 (1981-10-01), Ritze
patent: 4303298 (1981-12-01), Yamashita

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