کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1814579 1025651 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ionic conductivity and phase stabilization in Cu- and Tl-substituted CsAg2I3
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Ionic conductivity and phase stabilization in Cu- and Tl-substituted CsAg2I3
چکیده انگلیسی

Samples of general formula CsAg2−xMxI3, x=0–0.4 and M=Cu and Tl, have been prepared and studied by powder X-ray diffraction, DSC and electrical conductivity measurements. X-ray diffractograms and DSC curves showed the possibility of stabilizing the high-temperature α-phase at lower temperatures in Tl-substituted samples, while such results were not obtained in Cu-substituted samples. Ionic conductivity measurements showed two regions corresponding to the low- and high-temperature phases. The transition temperature between the two phases was found to remain unchanged with the addition of Cu+ and decreased gradually with increasing Tl+. The ionic conductivity decreased in Cu-substituted samples and enhanced with the incorporation of Tl+ ion in the lattice of CsAg2I3. Dielectric constant was found to show behaviour similar to that of the ionic conductivity, and this is an evidence of the predominant effect of ion hopping on this property.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 403, Issue 12, 1 June 2008, Pages 2097–2102
نویسندگان
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