کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1653763 1517345 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric properties of lanthanum substituted barium titanate microwave ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Dielectric properties of lanthanum substituted barium titanate microwave ceramics
چکیده انگلیسی

In this study, we report the high dielectric constant lanthanum substituted barium titanate ceramic material for its possible applications at microwave frequencies. The microwave dielectric characterization of Ba6 − 3xLa8 + 2xTi18O54 solid solutions with 0.0 ≤ x ≤ 0.7 prepared by conventional mixed oxide route method has been carried out. The lattice parameters were obtained from the X-ray diffraction patterns. It was observed that lattice parameters increased with respect to an increase in the ‘La’ content. The crystal symmetry investigated was orthorhombic with space group of Pbam. From the evaluation of microwave dielectric properties of lanthanum doped barium titanate ceramics, it was observed that a maximum value of dielectric constant (ε′) = 157 and a minimum tangent loss (tanδ) = 0.0572 was obtained. The minimum value of a.c. conductivity (σa.c.) was observed to be 1.76e − 07 S/m.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 60, Issues 25–26, November 2006, Pages 3179–3182
نویسندگان
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