کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1613017 | 1516308 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis, characterization and microwave dielectric properties of spinel MgGa2O4 ceramic materials
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Spinel MgGa2O4 ceramic materials were synthesized by solid-state method. MgGa2O4 powders were investigated with X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectrum, Raman spectrum, X-ray photoelectron spectrum (XPS), and high resolution transmission electron microscopy (HRTEM). The spinel-structured MgGa2O4 ceramics sintered at 1410 °C exhibited excellent microwave dielectric properties: a dielectric constant (Ér) of 9.54, a quality factor (Q Ã f) of 117,000 GHz (at 14.7 GHz frequency) and a temperature coefficient of resonant frequency (Ïf) of â4.0 ppm/°C. MgGa2O4 ceramics have a wide sintering temperature region (â¼150 °C) and nearly zero Ïf value. The large relative density, uniform microstructure and cation ordering resulted in high Q Ã f values. Crystal distortion from the oriented growth was advantageous to produce nearly zero Ïf value. MgGa2O4 ceramics are promising candidate materials for millimeter-wave devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 585, 5 February 2014, Pages 542-548
Journal: Journal of Alloys and Compounds - Volume 585, 5 February 2014, Pages 542-548
نویسندگان
Songping Wu, Juanjuan Xue, Rui Wang, Jianhui Li,