کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7903523 | 1510462 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement of ionic conductivity in Li2O-SiO2 glass in nanodimensions grown within pellets of ZnO nanorods and magnetodielectric properties of these nanocomposites
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Enhancement of ionic conductivity in Li2O-SiO2 glass in nanodimensions grown within pellets of ZnO nanorods and magnetodielectric properties of these nanocomposites Enhancement of ionic conductivity in Li2O-SiO2 glass in nanodimensions grown within pellets of ZnO nanorods and magnetodielectric properties of these nanocomposites](/preview/png/7903523.png)
چکیده انگلیسی
23Li2O·77SiO2 glass with nanodimensions was grown within the pores of a pellet formed by ZnO nanorods of a diameter of 70 nm and lengths varying from 80 nm to 270 nm. The resistivity of the nanoglass was less than that of its bulk counterpart by more than three orders of magnitude. The activation energy was found to be 35% lower than that of the bulk glass. This was ascribed to an increase in free volume in the nanodimensional glass. The ac conductivity variation at high frequency showed an exponent of 0.5 indicating two dimensional movements of lithium ions in the nanoglass. Nanocomposites of lithia-silica nanoglass and CuO nanoparticles showed magnetodielectric property with dielectric permittivity at 500 kHz decreasing by 5.3% at 2 T. This was explained on the basis of space charge polarization and Hall Effect. Nanocomposites of lithia-silica nanoglass and ZnO nanorods exhibited a giant magnetodielectric effect with the dielectric permittivity increasing by 20% to 99% at 2 T depending on the measuring frequency. This was also ascribed to space charge polarization with the ZnO nanophase showing a negative magnetoresistance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 376, 15 September 2013, Pages 12-17
Journal: Journal of Non-Crystalline Solids - Volume 376, 15 September 2013, Pages 12-17
نویسندگان
Dhriti Ranjan Saha, Arun Kumar Nandi, Dipankar Chakravorty,