Coloration and Photochromic Properties of Glasses in the BaO–PbO–Al2O3–B2O3 System

被引：0
作者：
N. A. Papunashvili
机构：
[1] Academy of Sciences of Georgia,Institute of Cybernetics
来源：
Glass Physics and Chemistry | 2002年 / 28卷
关键词：
Al2O3; Halide; B2O3; Halogen; Brown Color;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A systematic spectrophotometric study of the compositions of photochromic glasses in the BaO–PbO–Al2O3–B2O3 system is performed for different combinations of photochromic additives. It is revealed that the chosen composition of the base glass facilitates the formation of colloidal silver particles, even though silver is involved in any combination of photochromic additives. This is especially true for a low content of halogen ions [1 wt % (Cl– + Br–)] at the concentration ratio [Ag]/[Hal] = 0.33. As a result, the glass changes to a reddish brown color and does not exhibit photochromic properties. An increase in the halogen concentration in the range [Ag]/[Hal] = 0.07–0.33 results in a decrease in the amount of colloidal silver particles. Most likely, this is accompanied by an increase in the content of the silver halide phase; that is, the necessary content of the photosensitive phase is provided to manifest the photochromic effect in the studied glass.
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页码：224 / 228
页数：4
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