کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5438981 | 1398190 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improving microwave dielectric properties of temperature - compensated Mg(1.04-1.5y)CeyTiO3 - based Ceramics with high quality factor
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The phase formation, microstructure, chemical structure, and microwave (MW) dielectric properties of the composite ceramics (1-x)Mg(1.04-3/2y)CeyTiO3-xCaTiO3 (MCT-CT) have been investigated systematically. The CaTiO3 and MgTiO3 phases coexist well with the formation of secondary phase MgTi2O5 based on X-ray diffraction. Chemical structure analysis reveals the existence of oxygen vacancies (VO
-
- ) whose concentrations increase with x, which consequently induce microwave dielectric loss. It has demonstrated that the behaviors of QÃf are influenced strongly by the phase composition and vacancy defects. Although an increasing amount of CaTiO3 can improve the dielectric constant (εr) of the sample slightly, it renders a decrease in the QÃf value instead. The Ïf value is strongly correlated to the compositions and the existing phases that can be controlled. An excellent combination of the MW dielectric properties εrâ¼23, QÃfâ¼70, 800 GHz, and Ïfâ¼0 ppm/°C was obtained at x=0.08, sintered at an optimal temperature of 1300 °C/3 h.
-
- ) whose concentrations increase with x, which consequently induce microwave dielectric loss. It has demonstrated that the behaviors of QÃf are influenced strongly by the phase composition and vacancy defects. Although an increasing amount of CaTiO3 can improve the dielectric constant (εr) of the sample slightly, it renders a decrease in the QÃf value instead. The Ïf value is strongly correlated to the compositions and the existing phases that can be controlled. An excellent combination of the MW dielectric properties εrâ¼23, QÃfâ¼70, 800 GHz, and Ïfâ¼0 ppm/°C was obtained at x=0.08, sintered at an optimal temperature of 1300 °C/3 h.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 3, 15 February 2017, Pages 3051-3056
Journal: Ceramics International - Volume 43, Issue 3, 15 February 2017, Pages 3051-3056
نویسندگان
Wei Gong, Burhan Ullah, Wen Lei, Gui-Fen Fan, Xiao-Hong Wang, Wen-Zhong Lu,