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偏光显微粉末法在秦俑、汉阳陵颜料鉴定中的应用 被引量:19
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作者 夏寅 周铁 张志军 《文物保护与考古科学》 2004年第4期32-35,共4页
为探索偏光显微粉末法在颜料鉴定中的应用 ,利用该方法并辅以显微化学法 ,对采自秦俑和汉阳陵等地颜料的晶体颗粒的大小、形状、颜色、表面形态、折射率、双折射率和消光性等光学性质分别进行了测定。结果表明 ,鉴定出秦俑样品中有 10... 为探索偏光显微粉末法在颜料鉴定中的应用 ,利用该方法并辅以显微化学法 ,对采自秦俑和汉阳陵等地颜料的晶体颗粒的大小、形状、颜色、表面形态、折射率、双折射率和消光性等光学性质分别进行了测定。结果表明 ,鉴定出秦俑样品中有 10种颜料 ,汉阳陵中有 5种颜料 ,且秦俑的紫色颜料中加入的朱砂与汉阳陵相比颗料较大数量也较多。说明了该方法可鉴别古代无机和有机颜料 ,并可望用于岩石、陶瓷、锈蚀物等方面的分析。 展开更多
关键词 秦俑 偏光粉末法 显微化学法 颜料鉴定
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Layer by layer synthesis of Sn-Co-C microcomposites and their application in lithium ion batteries 被引量:4
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作者 周向阳 邹幽兰 +2 位作者 杨娟 谢静 王松灿 《Journal of Central South University》 SCIE EI CAS 2013年第2期326-331,共6页
Alloy anodes were studied for pursuing Sn-based microcomposite synthesis, assembly and performance for lithium ion batteries. The self-assembled Sn-Co-C composites with nano-scaled microstructures were prepared via so... Alloy anodes were studied for pursuing Sn-based microcomposite synthesis, assembly and performance for lithium ion batteries. The self-assembled Sn-Co-C composites with nano-scaled microstructures were prepared via solution method and carbothermal technology. The morphology and physical structure were investigated with scanning electron microscope (SEM) and X-ray diffraction (XRD). The as-prepared materials were assembled to half cell coin for the purpose of discussing the galvanostatic cycling, cyclic voltammetry and rate-capability performance. Results reveal that nanoscaled CoSn 2 alloys covered with Sn and C layer by layer are wrapped by cross-linked porous carbon network to form spherical microstructure. This distinguishing feature of Sn-Co-C composites provides a possible solution to the problems of Sn particle aggregation and poor electron transport, and has strong effect on improving electrochemical performance. 展开更多
关键词 Sn-Co-C composite HYDROLYSIS carbothermal technology electrochemical performance lithium ion battery
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