Title: Photochromic glasses which darken to a pink hue
Application Number: 94100878 Application Date: 1994.01.20
Publication Number: 1095048 Publication Date: 1994.11.16
Approval Pub. Date: 1998.03.11 Granted Pub. Date: 1998.03.11
International Classifi-cation: C03C3/093;C03C4/06
Applicant(s) Name: Corning Incorporated Address:
Inventor(s) Name: Luc Grateau;Michel Prassas
Attorney & Agent: WU HUIZHONG
Abstract:
    A photochromic glass with the compsn. (wt.%, oxide basis) 52-58 SiO2, 16-21 B2O3, 6-9 Al2O3, 1.5-2.8 ZrO2, 2-3.5 Li2O, 0-2.5 Na2O, 4-8 K2O, 2-3.5 CaO and 1.2-2.5 TiO2, with 0.15-0.25 wt.% Ag, 0.06-0.13 wt.% Br, 0.25-0.40 wt.% Cl and 0.003-0.007 wt.% CuO as photochromic components and 2-10 ppm Au and up to 0.9% Er2O3 displays a pink hue in the darkened state.
Time: 8