摘要
本文对Cu-Ge-Se,Cd-Ge-Se,Cu-As-Se和Cd-As-Se系统的玻璃形成能力进行了分析,确定了这些系统的玻璃形成区,结果表明,玻璃形成能力的大小从Cd-Ge-Se,Cu-Ge-Se,Cd-As-Se和Cu-As-Se依次增强.根据硫系玻璃孤对电子判断规则对这些系统形成玻璃能力的差异进行了解释,并对这些系统的物理性质作了研究.对Cu-As-Se系统玻璃而言,随组成中Cu含量增加,玻璃转变温度、显微硬度、屈点、密度和电导率相应增加;热膨胀系数、电导活化能则相应下降.采用X射线衍射与DTA研究了Cu-As-Se系统玻璃的析晶产物,测定了析出晶相CuAsSe_2的结构与晶格常数.
The glass forming regions of Cu-Ge-Se, Cd-Ge-Se, Cu-As-Se and Cd-As-Se system were investigated.The results showed that the glass forming ability increased in the order of Cd-Ge-Se, Cu-Ge-Se, Cd-As-Se and Cu-As-Se systems. This result was explained according to the rule of chalcogenide glass lone-paired electrons. For Cu-As-Se system glasses, the density, glass transition temperature, sag point, microhardness and electrical conductivity increase and the thermal expansion coefficient and activation energy for electrical conduction decrease with the increase of Cu concentration in glasses. Using X-ray diffraction analysis and DTA, the crystallization products were identified and the crystal structure and unit-cell constant of CuAsSe_2 were determined.
关键词
玻璃
硫系
红外光学
形成
性质
glass forming regions
chalcogenide glasses
copper and cadmium containing chalcogenide glasses
glass properties
crystallization of glasses
