کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990652 | 1516130 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Colossal and relaxor-like dielectric behaviors in SrCrO4 ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ceramic SrCrO4 samples were prepared via conventional solid state reaction route. Dielectric properties of SrCrO4 were systematically investigated in the frequency range of 102-106â¯Hz and temperature range of 5-900â¯K. Colossal dielectric behavior near room temperature and relaxor-like dielectric behavior around 730â¯K with an extremely high dielectric constant up to 1.62â¯Ãâ¯105 were found. Dual relaxation mechanism composed of a dipolar and a Maxwell-Wagner relaxations is found to be responsible for the colossal dielectric behavior. The dipolar relaxation (R1) is related the defect dipole pair of -Cr3+ caused by chemically absorbed water. The Maxwell-Wagner relaxation (R2) results from grain boundaries. The relaxor-like dielectric behavior is associated with the hopping motion of oxygen vacancies which leads to a high-temperature relaxation (R3).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 764, 5 October 2018, Pages 300-306
Journal: Journal of Alloys and Compounds - Volume 764, 5 October 2018, Pages 300-306
نویسندگان
J. Sun, S.T. Wang, L. Tong, J. Wang, S.A. Suhaib, Y.M. Xie, G.B. Zhu, C.C. Wang,