Structures and Thermal Properties of Silver(I) (Poly)chalcogenide Halide Solid Solutions Ag10Te4–(q, p)Q(q, p)Br3 with Q = S, Se
Structures and Thermal Properties of Silver(I) (Poly)chalcogenide Halide Solid Solutions Ag10Te4–(q, p)Q(q, p)Br3 with Q = S, Se
复制标题
银(I)(多)硫族化物卤化物固溶体Ag10Te4–(q, p)Q(q, p)Br3 (Q = S, Se)的结构和热性能
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
M. Bawohl
中科院分区：
文献类型：
--
作者：
T. Nilges;M. Bawohl
X射线衍射实验、热分析和EDX光谱被用来确定固溶体Ag10Te4−qSqBr3和Ag10Te4−pSepBr3的结构和热性质。本研究完成了对银（I）（聚）硫属化物卤化物的研究，这是一类新型混合电子和离子导体，一般组成为Ag 10 Q 4 X 3（Q =硫属元素，X =卤素）。高银迁移率内的多碲化物亚结构和一个明显的多晶型是这些固体电解质的特征。当Te被较轻的同系物Se和S取代时，相变温度降低。即使是低取代度导致显着较低的相变的高温多晶型物相比，Ag10Te4Br3。对于最大取代的含硫相，存在银子结构内的永久性无序。
X-Ray diffraction experiments, thermal analyses and EDX spectroscopy were performed to determine the structural and thermal properties of the solid solutions Ag10Te4−qSqBr3 and Ag10Te4−pSepBr3. The present investigation completes the work on silver(I) (poly)chalcogenide halides, a new class of mixed electron and ion conductors, with the general composition Ag10Q4X3 (Q = chalcogen and X = halogen). A high silver mobility within the polytelluride substructure and a pronounced polymorphism are characteristic features of these solid electrolytes. Phase transition temperatures are reduced upon the substitution of Te by the lighter homologs Se and S. Even low degrees of substitution lead to significantly lower phase transitions for the high-temperature polymorphs compared with Ag10Te4Br3. A permanent disorder within the silver substructure is present for the maximally substituted sulfur containing phases.