一件战国时期八棱柱状铅钡玻璃器的风化研究

Weathering of an Octagonal PbO-BaO-SiO_2 Glass Stick from the Warring States Period

利用三维视频显微镜、偏光显微镜、X射线衍射仪(XRD)、激光拉曼光谱(Raman)和扫描电子显微镜/能谱仪(SEM-EDX)等分析测试仪器,分析了一件战国时期淡绿色八棱柱状玻璃饰品,确定其为铅钡玻璃,主要显色元素为Cu。发现碱性环境中,Pb析出形成碳酸铅是导致其层状风化结构形成的关键。本研究分析和探讨了该件八棱柱状物的风化产物、风化形貌和元素迁移情况。

An octagonal green glass stick from the warring states period excavated in gansu province was analyzed in the paper by using three-dimensional video microscope,polarizing microscope,X-ray diffractometer （XRD）,scanning electron microscope equipped with energy dispersive （SEM-EDX） and Raman microspectroscopy.This glass stick was determined to be traditional PbO-BaO-SiO2 glass system in China.The main colorant is copper.In an alkaline environment,the process of Pb separating from the glass and tuning into PbCO3 is the main reason for the laminated structure during the weathering.Based on the above results a discussion on weathering,morphology of weathered products and the migration of the elements in the octagonal green glass stick was also presented.