کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10624480 | 989594 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Williamson-Hall analysis and the dielectric behavior of complex perovskites (BaM0.9Mâ²0.1)0.984O3 (M=Ti, Zr; Mâ²=Nb, Ta)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The long range average structure and local distortions of perovskite type solid solutions (BaTi0.9Mâ²0.1)0.984O3 and (BaZr0.9Mâ²0.1)0.984O3 (Mâ²=Nb, Ta) were examined by high-resolution synchrotron X-ray diffraction. A Rietveld refinement indicated that all four solid solutions had simple cubic symmetry, where the lattice volume varied according to the size of the cationic constituents. As revealed by Williamson-Hall analysis and scanning electron microscopy, both (BaTi0.9Mâ²0.1)0.984O3 had denser and enlarged grains than the parental BaTiO3, and had anisotropic microstrain that are indicative of the non-periodic atomic displacements along the [100] directions of the cubic cell. (BaTi0.9Nb0.1)0.984O3 and (BaTi0.9Ta0.1)0.984O3 exhibited relaxor-like dielectric behavior with Curie temperatures of 230Â K and 195Â K, respectively. On the other hand, (BaZr0.9Nb0.1)0.984O3 and (BaZr0.9Ta0.1)0.984O3 showed almost unchanged dielectric behavior compared to that of BaZrO3.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 42, Issue 1, Part B, January 2016, Pages 1432-1438
Journal: Ceramics International - Volume 42, Issue 1, Part B, January 2016, Pages 1432-1438
نویسندگان
Keon Ho Moon, Young-Il Kim, Chee-Sung Park,