کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1608359 | 1516248 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Consequence of pH variation on the dielectric properties of Cr-doped lithium ferrite nanoparticles synthesized by the sol-gel method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Nanocrystalline Cr-doped lithium ferrites have been synthesized at different pH values through sol-gel process. Dielectric properties of the synthesized samples were studied via impedance measurements in the frequency range of 100Â Hz-7Â MHz at room temperature. It was found that the dielectric properties strongly depended on the pH value, and the sample synthesized at pH 3.5 exhibited the highest dielectric constant, on the order of â¼107. In contrast, the sample synthesized at pH 11.5 exhibited the lowest dielectric constant. The occurrence of a peak in the dielectric loss spectra was found to be pH dependent, whereas the AC conductivity increased with frequency and was the highest in the sample synthesized at pH 3.5. The impedance spectroscopy and modulus formulism were also employed to investigate the charge transfer and relaxation dynamic properties. Consequently, dielectric properties of the samples were easily tuned by varying the pH during the synthesis process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 645, 5 October 2015, Pages 171-177
Journal: Journal of Alloys and Compounds - Volume 645, 5 October 2015, Pages 171-177
نویسندگان
Manish Srivastava, R.K. Mishra, Jay Singh, Neha Srivastava, Nam Hoon Kim, Joong Hee Lee,