کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1528189 1511865 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of La2O3 doping on the tunable and dielectric properties of BST/MgO composite for microwave tunable application
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Effect of La2O3 doping on the tunable and dielectric properties of BST/MgO composite for microwave tunable application
چکیده انگلیسی

Undoped and La2O3doped (0.5, 1.0, 2.0, 3.0 wt.%) Ba0.55Sr0.45TiO3/MgO composites were prepared by traditional ceramic processing and their structural, surface morphological, tunable properties and their dielectric properties at low frequency and microwave frequency were systemically examined. The result shows that La2O3 dopant has a strong effect on the average grain size. The La2O3 doped samples have lower temperature coefficient of capacitance than the undoped. The 0.5 wt.% La2O3 doped sample has a little higher tunability than the undoped and the tunability of other doping concentration samples is lower as compared to the undoped. The addition of La2O3 decreases the dielectric constant and increases quality factor (Q × f) at microwave frequency. The 0.5 wt.% La2O3 doped samples have the best properties among these samples and have a higher tunability, lower dielectric constant and lower dielectric loss tangent at microwave frequency and these properties are very beneficial to the development of the tunable devices application.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 95, Issues 2–3, 10 February 2006, Pages 222–228
نویسندگان
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