کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5459473 | 1516176 | 2017 | 47 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural, electrical and dielectric properties of nanocrystalline LiMgBO3 particles synthesized by Pechini process
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural, electrical and dielectric properties of nanocrystalline LiMgBO3 particles synthesized by Pechini process Structural, electrical and dielectric properties of nanocrystalline LiMgBO3 particles synthesized by Pechini process](/preview/png/5459473.png)
چکیده انگلیسی
Nanocrystalline lithium magnesium borate (LiMgBO3) powders were synthesized by a Pechini process. Thermal behavior of the polymeric intermediate of LiMgBO3 sample was studied by TG-DTA. Structure and the local structural coordination of the as-prepared and calcined polymeric intermediate at 750 °C of LiMgBO3 sample were investigated by FT-IR and 7Li & 11B magic angle spinning - nuclear magnetic resonance (MAS-NMR) measurements respectively. XRD results confirm the formation of the pure nanocrystalline monoclinic phase of the LiMgBO3 sample prepared at 750 °C. The BET surface area of the calcined polymeric intermediate of LiMgBO3 sample is found to be 60.48 m2g-1. The observed SEM micrographs of the LiMgBO3 sample showed the formation of agglomerated sheet-like morphology particles and the existence of Mg and O elements in LiMgBO3 are confirmed from the SEM-EDX spectral result. The band gap energy of LiMgBO3 sample is evaluated and it was found to be 3.64 eV. From the analysis of the measured impedance data, at different frequencies and temperatures, the evaluated electrical conductivity of LiMgBO3 sample was found to be 9.706 Ã 10â5 S cmâ1 at 200 °C. From the temperature dependence of conductivity (log ÏT vs. 1000/T) plot of the LiMgBO3 sample, the evaluated activation energy (Ea) for the migration of the charge carrier was found to be 0.62 eV. The measured impedance data and the LiMgBO3 sample pellet dimensions were used for calculating AC conductivity (Ïac), dielectric (εâ², εâ³, tan δ), electric modulus (Mâ² and Mâ³) data and were analyzed to find out the electrical and dielectric properties of the LiMgBO3 sample.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 718, 25 September 2017, Pages 459-470
Journal: Journal of Alloys and Compounds - Volume 718, 25 September 2017, Pages 459-470
نویسندگان
Kamatam Hari Prasad, S. Subramanian, T.N. Sairam, G. Amarendra, E.S. Srinadhu, N. Satyanarayana,