PHOTOSENSITIVE COLORED GLASSES CONTAINING SILVER AND MICROCRYSTALS OF ALKALI METAL FLUORIDE

    公开(公告)号:CA1078657A

    公开(公告)日:1980-06-03

    申请号:CA266171

    申请日:1976-11-19

    Abstract: PHOTOSENSITIVE COLORED GLASSES The instant invention relates to photosensitive glasses, i.e., glasses which, after an exposure to high energy or actinic radiations, can be heat treated in a certain manner to develop a colored transparent article, or which can be thermally opacified to produce a colored opal glass. More particularly, the instant invention is directed to alkali metal halide silver halide-containing photosensitive glasses which, through a unique sequence of shortwave radiation exposures and heat treatments, exhibit the total range of colors seen in the visible spectrum either in the transparent or in the opacified state and in three dimensions. The base glass composition can be varied widely, but the presence of silver, alkali metal oxide, fluorine, at least one of the group consisting of chlorine, bromine, and iodine, and, where ultra-violet radiations comprise the actinic radiations, cerium oxide is required. Multi-colored photographs and other unique decorative effects can be imparted into such glasses. Where desired, polarization effects can be secured in the glasses.

    HYDRATION OF SILICATE GLASSES IN AQUEOUS SOLUTIONS

    公开(公告)号:CA1057955A

    公开(公告)日:1979-07-10

    申请号:CA221212

    申请日:1975-03-04

    Abstract: HYDRATION OF SILICATE GLASSES IN AQUEOUS SOLUTIONS The present invention relates to a method for hydrating finedimensioned alkali metal-containing silicate glass bodies so as to impart the property of thermoplasticity thereto. More particularly, this invention contemplates contacting fine-dimensioned alkali metal silicate glass bodies with an aqueous solution at elevated temperatures and pressures to develop at least a surface layer thereon having a water content ranging up to about 36% by weight, said aqueous solution having a pH less than 6 as measured at room temperature. The hydrated bodies can approach certain properties of highpolymer organic plastics and exhibit the capability of being thermoplastically formed at relatively low temperatures.

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