کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1296680 | 1498349 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical and structural origin of conductivity changes in CdSe-AgI-As2Se3 glasses
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Chalcohalide glasses in the CdSe-AgI-As2Se3 system were synthesised and characterised for the first time. The glass-forming range for (CdSe)x(AgI)0.5 â x/2(As2Se3)0.5 â x/2 compositions was found to be limited to x â¤Â 0.20 without any significant change in the glass transition temperature but with two sub-regions with decreased (x â¤Â 0.05) and increased (x â¥Â 0.10) crystallisation ability. The glasses belong to ionic conductors and their conductivity decreases drastically with increasing x accompanied by simultaneous increase of the activation energy. The observed changes in the ionic transport properties are caused by two independent mechanisms: (i) an exchange reaction, CdSe + 2AgI â CdI2 + Ag2Se, taking place in the glass-forming melt, and (ii) blocking of Ag+ preferential conduction pathways by cadmium.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 181, Issues 11â12, 29 April 2010, Pages 466-472
Journal: Solid State Ionics - Volume 181, Issues 11â12, 29 April 2010, Pages 466-472
نویسندگان
M. Kassem, D. Le Coq, M. Bokova, E. Bychkov,