کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11032063 | 1645695 | 2018 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The effect of dual substitution of Na and Al on ionic conductivity of Na0.5Bi0.5TiO3 ceramics
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The Na and Al dual substitution Na0.5Bi0.5TiO3 samples were synthesized by the conventional solid-state reaction method. The oxygen ion conductivity and migration in the Na0.54Bi0.46Ti1âxAlxO2.96âx/2 (xâ¯=â¯0.02, 0.04, 0.06 and 0.08) samples were investigated. The grain conductivity and relaxation activation energy of the Na0.54Bi0.46Ti1âxAlxO2.96âx/2 samples show the trend of declining-rising-declining with the increase of Al-doped content. The highest grain conductivity can arrive at 0.0016â¯S/cm for the Na0.54Bi0.46Ti1âxAlxO2.96âx/2 (xâ¯=â¯0.06) sample at 673â¯K and the corresponding activation energy is about 0.80â¯eV, which are the lowest results of oxygen ion diffusion in the Na0.54Bi0.46Ti1âxAlxO2.96âx/2 (xâ¯=â¯0.02, 0.04, 0.06 and 0.08) samples. The mobile oxygen vacancy content decreases with increasing Al-doping content in the Na0.54Bi0.46Ti1âxAlxO2.96âx/2 compounds. The sudden change of grain conductivity in NBT-Na4Al6 sample may be from the lower activation energy and better oxygen vacancy mobility. These results are helpful to improve the electrical performance by doping methods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Results in Physics - Volume 11, December 2018, Pages 422-426
Journal: Results in Physics - Volume 11, December 2018, Pages 422-426
نویسندگان
W.G. Wang, X.Y. Li, T. Liu, G.L. Hao,