铜镉光致变色玻璃的性能与结构

Properties and Structure of Copper—Cadmium Halide Photochromic Glasses

铜镉光致变色玻璃的光变色性能和基础玻璃组成之间有着密切联系。可以用F=[(R_2O+MO)-Al_2O_3]/B_2O_3来表述具有良好光变色性能的玻璃的组成范围。本文用红外光谱、拉曼光谱研究了这类玻璃的基本结构。结果表明,基础玻璃由[SiO_4]、[BO_3]、[BO_4]、[AlO_1]共同构成空间网络,其中[BO_3]、[BO_4]相互连接成两种硼酸盐基团和一种硼氧环。透射电镜照片直接给出了玻璃分相和沉积出的微品粒形貌。结合以上的研究结果和玻璃的光变色性,在分子及分子基团的水平上讨论了结构同性能的关系。

The photochromic properties of photochromic glasses containing bothcopper halides and cadmium halides depend mainly upon the body glass com-position. The composition range of glass matrix can be described by F'=[(R_2O+MO)-Al_2O_3]/B_2O_3. In this paper the basic structure of the glass-es is investigated in terms of IR and raman spectroscopy in detail. The res-ults demonstrate that the space net of body glass is constructed by [SiO_4]、[BO_3]、[BO_4] and [AlO_4] in which [BO_3] and [BO_4] are interconnected intotwo Kinds of borate groups and a kind of boroxol ring. Transmission ion elec-tron micrographes show the phase-separated droplets and the shape of depos-jted microcrystal in the glass. Finally, the relations between struc ture andprperties have been discussed on the scale of molecules and molecular groups.