PbI_2-PbBr_2-KCl系统玻璃的化学稳定性研究  

CHEMICAL STABILITY OF PbI 2PbBr 2KCl GLASS

作　　者：金政武 程继健[1] 

机构地区：[1]华东理工大学无机材料系

出　　处：《硅酸盐学报》1997年第1期12-17,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金

摘　　要：从ＰｂＩ２ＰｂＢｒ２ＫＣｌ三元系统中选择摩尔百分组成为５０ＰｂＩ２·３０ＰｂＢｒ２·２０ＫＣｌ的玻璃，在２５℃的恒温下研究了该玻璃在静态去离子水中的侵蚀过程。在侵蚀过程中，侵蚀液的ｐＨ值经历一个由快速下降到逐渐稳定的变化过程。诱导期过后，玻璃中的各组分以分子形式溶解，这是一个选择性溶解过程，溶解度较高的组分将优先溶解。溶液分析结果表明，玻璃的侵蚀是一个扩散控制的过程。The corrosion process of 50PbI 2·30PbBr 2·20KCl(in mole percent)glass was studied in static deionized water at a constant temperature of 25℃.The pH value of solution was observed to decrease to a constant value after a rapid drop in the initial period.This behavior of pH variation is attributed to the hydrolysis reaction of PbX 2(X=Br,I)dissolved in the solution.After a short period,the glass components dissolve in the solution as halides without a prior hydrolysis,and it is a selective dissolved process.The dissolving rate of each component is proportional to its own solubility.From solution analysis,it shows that the corrosion process is a diffusioncontrolled process.It is found that introducing less soluble components is the key for improving the chemical stability of a non fluoride halide glass.

关 键 词：非氟 卤化物玻璃 化学稳定性 玻璃 

分 类 号：TQ171.716[化学工程—玻璃工业] TQ171.113[化学工程—硅酸盐工业]