کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9801868 | 1515732 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impedance spectroscopy studies of K2SO4 in the intermediate temperature regime
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Impedance spectroscopy measurements of K2SO4 have been carried out from 5 Hz to 13 MHz over the temperature range 403-782 °C. The plots of corrected imaginary part of permittivity, εâ³, and its real part εⲠvs. frequency clearly show a new dielectric relaxation around fmax=1.4Ã104 Hz at 403 °C, which shifts to higher frequencies (â¼1 MHz) as the temperatures increases. The fmax (calculated from the peak position of εâ³) vs. reciprocal T shows an activated relaxation process over the temperature range 403-600 °C with activation energy Ea=1.02 eV, which is close to that derived from the dc-conductivity, EÏ=1.15 eV. We suggest that the observed dielectric relaxation could be produced by the K+ jump and SO4â reorientation that cause distortion and change the local lattice polarizability inducing dipoles like KSO4â.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 136, Issues 11â12, December 2005, Pages 601-604
Journal: Solid State Communications - Volume 136, Issues 11â12, December 2005, Pages 601-604
نویسندگان
J.E. Diosa, R.A. Vargas, I. Albinsson, B.-E. Mellander,