کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11001679 1007993 2019 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystal structure and enhanced microwave dielectric properties of non-stoichiometric Li3Mg2+xNbO6 ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Crystal structure and enhanced microwave dielectric properties of non-stoichiometric Li3Mg2+xNbO6 ceramics
چکیده انگلیسی
Non-stoichiometric Li3Mg2+xNbO6 ceramics were prepared by the solid-state reaction process. The effects of additional magnesium contents on the microstructure, sintering behavior and dielectric performance of Li3Mg2+xNbO6 ceramics were investigated systematically. XRD patterns and Rietveld refinement indicated that all of the samples exhibited a single-phase orthorhombic structure. The εr was dependent on the density and Q × f values were affected by the microstructure and density. Additionally, the τf values were related to the NbO6 octahedron distortion. Remarkably, the Li3Mg2.04NbO6 ceramics sintered at 1100 °C had outstanding microwave dielectric characteristics: εr = 16, Q × f = 140,000 GHz, τf = −5.6 ppm/°C, making these ceramics promising candidates for millimeter-wave applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 235, 15 January 2019, Pages 84-87
نویسندگان
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