کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9761658 | 1498423 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ion dynamics in mechanochemically synthesized amorphous fast ionic conductor Ag2S-Sb2S3
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Frequency dependent electrical conductivity (Ïâ²) of mechanochemically synthesized amorphous fast ion conductors (FICs) xAg2S-Sb2S3 (x=70, 80, 85) is investigated in the frequency range 5 Hz-13 MHz and temperature range 95-385 K. While the universal dynamic response (UDR) model, Ïâ² (Ï)=Ïdc(T)+A(T)Ïn, does reproduce the shape of Ïâ² (Ï) spectra, the Ïdc(T) and A(T) show anomalous characteristics. Both exhibit two distinct Arrhenius regions, a low temperature region with a lower value of activation energy (E) and a high temperature region with higher value of activation energy. Further the frequency exponent n is a (decreasing) function of temperature, decreasing slowly at lower temperatures but more rapidly at higher temperatures. The correlation Eac=(1ân)Edc appears satisfactory in the low temperature region but unsatisfactory at higher temperatures. The isochronal representation of ac conductivity, Ïâ² vs. 1000/T at different frequencies, reveals the existence of a third regime, which is currently under active discussion and is known as superlinear power law (SLPL).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 13â14, 29 April 2005, Pages 1271-1280
Journal: Solid State Ionics - Volume 176, Issues 13â14, 29 April 2005, Pages 1271-1280
نویسندگان
J.P. Tiwari, K. Shahi,