کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10625324 | 989622 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanocrystalline La1âxSrxCo1âyFeyO3 perovskites fabricated by the micro-emulsion route for high frequency response devices fabrications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Nanocrystalline La1âxSrxCo1âyFeyO3 (x=0.00-0.60) perovskites were fabricated by a cheap economic route (i.e. micro-emulsion method) and characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). TGA analysis showed ~35% weight loss. The crystallite size determined by XRD and SEM ranged from 30 to 80 nm and ~30 to 50 nm, respectively. The dielectric behavior was evaluated in the range of 1.0Ã106 Hz to 3.0Ã109 Hz at 298 K, the dielectric parameters resulting appreciably enhanced by co-doping with Sr and Fe. The maximum dielectric parameters (εâ²=103.35, εâ³=58.92 and tan δ=0.57) were observed for La0.4Sr0.6Co0.4Fe0.6O3 at 15Ã106 Hz. Results suggest the potential use of these nanocrystalline perovskites in GHz-operated microwave devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 40, Issue 8, Part B, September 2014, Pages 13211-13216
Journal: Ceramics International - Volume 40, Issue 8, Part B, September 2014, Pages 13211-13216
نویسندگان
Muhammad Azhar Khan, Kamran Khan, Azhar Mahmood, Gulam Murtaza, Majid Niaz Akhtar, Irshad Ali, Muhammad Shahid, Imran Shakir, Muhammad Farooq Warsi,