초록 ▼

The invention relates to high energy beam-sensitive glass articles exhibiting insensitivity and/or inertness to actinic radiation, i.e., glass articles which are darkened and/or colored within a thin surface layer of, e.g., about 0.1-3 m+ion-exchanged glass articles having base glass within alkali m

The invention relates to high energy beam-sensitive glass articles exhibiting insensitivity and/or inertness to actinic radiation, i.e., glass articles which are darkened and/or colored within a thin surface layer of, e.g., about 0.1-3 m+ion-exchanged glass articles having base glass within alkali metal silicate composition fields containing at least one of the oxides of transition metals which have one to four d-electrons in an atomic state. Whereas the base glass composition can be varied widely, spontaneous reduction as well as photo-reduction of Ag+ions are inhibited and/or eliminated due to the presence of said transition metal oxides in the -lass article. The product of the invention is suitable for use as recording and archival storage medium and as phototools. The recorded images and/or masking patterns are up-datable, can be any single color seen in the visible spectrum, and is erasable by heat at temperatures above about 200°C.

대표청구항 ▼

A high energy beam-sensitive article bearing a recorded image readable in actinic radiation comprising a glass article, said glass article comprising an integral ion-exchanged surface layer (IIES layer) bearing the recorded image, said IIES layer composed of a glass layer of a glass composition that

A high energy beam-sensitive article bearing a recorded image readable in actinic radiation comprising a glass article, said glass article comprising an integral ion-exchanged surface layer (IIES layer) bearing the recorded image, said IIES layer composed of a glass layer of a glass composition that has been ion exchanged with an acidic aqueous solution containing soluble ionic silver to diffuse silver ions into said IIES layer to render said IIES layer sensitive to high energy beams, said glass composition consisting essentially of. in mole percent on the oxide basis. about 5-25% of one or more alkali metal oxides, at least 1.5% TiO2, but not exceeding 35% TiO2, the composition containing at least an effective amount of TiO2 to render the IIES layer insensitive to at least a spectral portion of actinic radiation, 0-about 20% MgO. 0-about 20% CaO, 0-about 20% ZnO. 0-about 15% Al2O3, 0-about 20% PbO, 0-about 20% BaO, 0-about 25% B2O3, 0-about 25% P2O5, 0-about 2-35% of at least one acid-durability-and-glass network-strengthener (ADAGNS) selected from the group consisting of MgO, ZnO, Al2O3, PbO, and CaO, 0-about 4% F, 0-about 2% Br. 0-about 2% I. 0-about 6% Cl, and about 50-89% SiO2. said IIES layer having been exposed to high energy beams in a predetermined pattern to reduce at least a portion of the silver ions of said IIES layer to elemental silver to produce the recorded image said IIES layer comprising, silver ions, elemental silver, and water in a concentration between about 0.01% and 12% by weight H2O.