Amber photochromic glasses

Details Amber photochromic glasses Amber photochromic glasses

1994-07-15

1996-01-09

Group, Karl

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 67, 501 43, C03C 406

Patent

active

054829011

ABSTRACT:
A surface-reduced photochromic glass containing silver halide crystals, having an original transmittance of 60-75%, a darkened transmittance of less than 30% at 25.degree. C., a faded transmittance equal to the darkened transmittance plus at least 25% and a value of at least 50%, a position in a color mixture diagram between 575 and 585 nm, the glass composition having a Na.sub.2 O content of at least 1% in its surface, or containing as additives 1-6 ppm Pd, or a combination of 2-10 ppm Au and up to 0.9% Er.sub.2 O.sub.3. The glass may be chemically strengthened and generally has a longer dominant wavelength when so treated.

REFERENCES:
patent: 3892582 (1975-07-01), Simms
patent: 3920463 (1975-11-01), Simms
patent: 4190451 (1980-02-01), Hares et al.
patent: 4240836 (1980-12-01), Borrelli et al.
patent: 4251278 (1981-02-01), Hares
patent: 4290794 (1981-09-01), Wedding
patent: 4608349 (1986-08-01), Kerko et al.
patent: 4832724 (1989-05-01), Borrelli et al.
patent: 4840655 (1989-06-01), Borrelli et al.
patent: 4878748 (1989-11-01), Johansen et al.
patent: 5244845 (1993-09-01), Kerko et al.
patent: 5256601 (1993-10-01), Kerko et al.
patent: 5300465 (1994-04-01), Grateau et al.

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