کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7887617 | 1509790 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Growth, microstructure, energy-storage and dielectric performances of chemical-solution NBT-based thin films: Effect of sodium nonstoichimometry
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Growth, microstructure, energy-storage and dielectric performances of chemical-solution NBT-based thin films: Effect of sodium nonstoichimometry Growth, microstructure, energy-storage and dielectric performances of chemical-solution NBT-based thin films: Effect of sodium nonstoichimometry](/preview/png/7887617.png)
چکیده انگلیسی
Na0.5+δBi0.5(Ti0.96W0.01Ni0.03)O3 thin films with various Na contents (abbreviated as Na.5+δBTWN, δâ¯=â¯â 3.0, ââ¯1.5, 0, 1.5%) were fabricated on ITO/glass substrates using a chemical-solution process. The effects of Na nonstoichiometry on the microstructure, insulating, ferroelectric and dielectric performances are investigated. The pure perovskite phase can be obtained in Na0.5BTWN and Na0.515BTWN, while for Na0.470BTWN or Na0.485BTWN, the main composition contains secondary phase of TiO2. The grain size increases from 30â¯nm at δâ¯=â¯â 3.0% to 55â¯nm at δâ¯=â¯0%, then decreases to 52â¯nm with δâ¯=â¯1.5%. The leakage current of Na0.485BTWN sample is reduced dramatically in comparison with Na0.5+δBTWN (δâ¯=â¯â 3.0, 0, 1.5%). The big recoverable energy-storage density of 63.1â¯J/cm2 and high energy-storage efficiency of 55.0% can be obtained for Na0.485BTWN due to the improved electric break-down strength and large difference value between the remanent polarization and maximum polarization. Enhanced dielectricity is achieved in Na0.485BTWN with a high tunability of 36.0% and a figure of merit of 4.0 at 450â¯kV/cm and 500â¯kHz. These results demonstrated that the crystallization, micrographs and energy storage and dielectric properties of Na0.5Bi0.5TiO3 are highly sensitive to low levels of Na-site nonstoichiometry.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 8, 1 June 2018, Pages 9152-9158
Journal: Ceramics International - Volume 44, Issue 8, 1 June 2018, Pages 9152-9158
نویسندگان
C.H. Yang, Q. Yao, J. Qian, Y.J. Han, J. Chen,