کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5437833 | 1398178 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Colossal permittivity and impedance analysis of tantalum and samarium co-doped TiO2 ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Colossal permittivity and impedance analysis of tantalum and samarium co-doped TiO2 ceramics Colossal permittivity and impedance analysis of tantalum and samarium co-doped TiO2 ceramics](/preview/png/5437833.png)
چکیده انگلیسی
In this study, (Ta0.5Sm0.5)xTi1âxO2 (x = 0, 0.02, 0.06, 0.15) ceramics (referred to as TSTO) were fabricated by a standard solid-state reaction. As revealed by the X-ray diffraction (XRD) spectra, the TSTOs exhibit a tetragonal rutile TiO2 structure. All the TSTO ceramics display colossal permittivity (~ 102-105). Moreover, the optimal ceramic, (Ta0.5Sm0.5)0.02Ti0.98O2, exhibits high performance over a wide temperature range from 20 °C to 160 °C. At 1 kHz, the dielectric constant and dielectric loss are 2.30 à 104 and 0.11 at 20 °C; they are 3.85 à 104 and 0.64 at 160 °C. Dielectric and impedance spectra analyses for the TSTO ceramics indicate that the CP behavior over a broad temperature range in (Ta+Sm) co-doped TiO2 could be explained by the internal barrier layer capacitance (IBLC) model, which consists of semiconducting grains and insulating grain boundaries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 43, Issue 16, November 2017, Pages 13349-13355
Journal: Ceramics International - Volume 43, Issue 16, November 2017, Pages 13349-13355
نویسندگان
Xianwei Wang, Bihui Zhang, Gaohang Shen, Lingyun Sun, Yanchun Hu, Linxin Shi, Xiaoer Wang, Chuang Jie, Liuju Zhang,