کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5440717 | 1398235 | 2017 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Origin of giant dielectric response in LiCuNb3O9 distorted perovskite ceramics
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Origin of giant dielectric response in LiCuNb3O9 distorted perovskite ceramics Origin of giant dielectric response in LiCuNb3O9 distorted perovskite ceramics](/preview/png/5440717.png)
چکیده انگلیسی
LiCuNb3O9 ceramics with the distorted cubic perovskite structure were prepared by a solid-state reaction method. The ceramic exhibited a very large value of permittivity (â¼4.4Â ÃÂ 104 at 100Â kHz) at room temperature (â¼300Â K) and a low-temperature dielectric relaxation behaviour following the Arrhenius law. The origin of the giant dielectric response of the LiCuNb3O9 ceramics was correlated with the structure of the ceramics. The barrier layers in the grain boundaries and the mixed-valent structure of Cu+/Cu2+ were found to contribute to the giant permittivity of the ceramics and confirmed by X-ray spectroscopy and complex impedance spectroscopy analyses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 4, April 2017, Pages 1861-1864
Journal: Journal of the European Ceramic Society - Volume 37, Issue 4, April 2017, Pages 1861-1864
نویسندگان
Xiuli Chen, Dandan Ma, Fen He, Guisheng Huang, Huanfu Zhou,