Ag10Te4Br3 –xClx and Ag10Te4Br3 –yIy: Structural and Electrical Property Tuning of a Mixed Conductor by Partial Anion Substitution
Ag10Te4Br3 –xClx and Ag10Te4Br3 –yIy: Structural and Electrical Property Tuning of a Mixed Conductor by Partial Anion Substitution
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Ag10Te4Br3 –xClx 和 Ag10Te4Br3 –yIy：通过部分阴离子取代调节混合导体的结构和电性能
DOI：
10.1515/znb-2007-0713
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
S. Lange
中科院分区：
文献类型：
--
作者：
T. Nilges;M. Bawohl;S. Lange
本文报道了所选相的X射线粉末和能谱分析、热分析、阻抗谱测量和晶体结构测定，以突出固溶体Ag10Te4Br3−xClx和Ag10Te4Br3−Yy的结构和电学性质。溴化物可以分别被高达x=1.6和y=0.2的氯化物或碘化物部分取代，而不改变四晶型离子导电性Ag10Te4Br3的结构性质。X射线粉末物相分析的结果得到了选定样品的单晶结构测定数据的补充。在室温下，在所有含氯相中都实现了γ-Ag10Te4Br3全有序结构类型，但部分碘取代导致了无序β-Ag10Te4Br3结构类型的稳定。阻抗谱测量表明，Ag10Te4Br2.8I0.2的r.t.银离子电导率比Ag10Te4Br3高一个数量级。
Abstract X-ray powder and EDX phase analyses, thermal analyses, impedance spectroscopic measurements, and crystal structure determinations of selected phases are reported to highlight the structural and electric properties of the solid solutions Ag10Te4Br3−xClx and Ag10Te4Br3−yIy. Bromide can be partially substituted by chloride or iodide up to x = 1.6 and y = 0.2, respectively, without changes in the structural properties of the tetramorphic, ion-conducting Ag10Te4Br3. Results from X-ray powder phase analyses have been complemented by data of single crystal structure determinations of selected samples. At r. t. the fully ordered γ -Ag10Te4Br3 structure type is realized in all chloride containing phases, but a partial iodide substitution leads to the stabilization of the disordered β -Ag10Te4Br3 structure type. Impedance spectroscopic measurements reveal a significant increase by one order of magnitude of the r. t. silver ion conductivity of Ag10Te4Br2.8I0.2 as compared with Ag10Te4Br3.