کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7887117 1509789 2018 32 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of dielectric properties and energy storage density of bismuth and lithium co-substituted strontium titanate ceramics
ترجمه فارسی عنوان
افزایش خواص دی الکتریک و تراکم ذخیره سازی انرژی سرامیک استونتیوم تیتانات با هم ترکیب شده با بیسموت و لیتیوم
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی
Polycrystalline Bismuth and Lithium Co-Substituted Strontium Titanate Sr (1-x)(Bi,Li)xTiO3, was prepared using the solid-state method with microwave assisted heating of initial materials. The effect of Bi3+ and Li+ concentration on the crystal structure, microstructure, and permittivity and energy storage properties of SrTiO3 ceramics are investigated. The phase and structure have been confirmed by XRD along with Rietveld refinement studies. Morphological investigations have been carried out using FESEM. Frequency and temperature dependence of dielectric permittivity was investigated using impedance spectroscopy. The sample with x = 0.02 has shown dielectric relaxation behavior. The activation energy of relaxation is found to be 1.2 eV and relaxation time equals 1.12 × 10−7 sec. The room temperature P-E loop has been investigated, and the result confirms that there is no signature of the ferroelectric phase in all samples. The energy storage density was theoretically estimated in the present study using a P-E loop. The results showed an astonishing ten-time increase in energy storage density with 8% co-substitution. With increasing x, the grain size steadily decreased, and dielectric breakdown strength increased, yielding a higher energy storage density. The obtained results herald a promising future in the development of electrical capacitors for energy storage applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 9, 15 June 2018, Pages 10367-10375
نویسندگان
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