کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7994190 | 1516157 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of SiO2 on dielectric properties of core-shell Sr and Tm co-doped BaTiO3@SiO2 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
Sr and Tm co-doped Ba0.7Sr0.3Ti0.9925Tm0.01O3 (BST) and core-shell structured BST@SiO2 ceramics were prepared by sol-gel method and conventional sintering. Along with the obvious perovskite phases in the BST and BST@SiO2 powders, a new phase, Ba2TiSi2O8, was confirmed in the sintered BST@SiO2 bulk by XRD analysis. TEM analysis revealed that the BST powders were coated with an amorphous SiO2 film, while SEM analysis indicated that the SiO2 film plays a role in grain size reduction. The dielectric losses of BST@SiO2 ceramics reduced effectively compared to that of BST. In addition, the Curie peak of the BST@1%SiO2 ceramic significantly broadened and the Curie temperature shifted toward lower temperatures; this provides a new approach to improving the dielectric properties of BaTiO3 ceramics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 737, 15 March 2018, Pages 213-220
Journal: Journal of Alloys and Compounds - Volume 737, 15 March 2018, Pages 213-220
نویسندگان
Caiyue Wang, Yongzhe Fan, Xue Zhao, An Du, Ruina Ma, Xiaoming Cao,