BaZrO3掺杂提高无铅Bi0.5Na0.5TiO3-SrTiO3铁电陶瓷的储能密度和效率

JST: Engineering and Technology for Sustainable Development Pub Date : 2022-03-15 DOI:10.51316/jst.156.etsd.2022.32.1.2

Thi Hinh Dinh, Vu Diem Ngoc Tran, Thi Thao Nguyen, Vinh Le Van, K. Pham

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摘要

为了提高无铅铁电陶瓷的储能密度和效率，对Bi0.5Na0.5TiO3-SrTiO3-BaZrO3三元铁电体系进行了研究。采用常规固相反应法制备陶瓷，在1150℃下烧结2 h，分析了样品的晶体结构、电场致极化、储能密度和效率性能。x射线衍射图表明，Bi0.5Na0.5TiO3-SrTiO3体系中BaZrO3的加入影响了其由四方结构向伪晶结构的转变。电场感应极化环证实了Bi0.5Na0.5TiO3-SrTiO3-BaZrO3陶瓷从铁电相到弛豫相的转变，提高了样品的储能密度和效率。纯Bi0.5Na0.5TiO3-SrTiO3 (x = 0)的储能密度和效率分别为~ 0.2 J/cm3和~ 29%。加入1%的BaZrO3后，样品的储能密度和效率分别提高到~0.4 J/cm3和~74%。当BaZrO3含量进一步增加到x = 0.03时，储能密度为~ 0.38 J/cm3，储能效率为~ 97%。结果表明，无铅铁电陶瓷有望成为储能电容器的候选材料。”

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Enhanced Energy Storage Density and Efficiency of Lead-Free Bi0.5Na0.5TiO3-SrTiO3 Ferroelectric Ceramics by BaZrO3 Doping

"To improve the energy storage density and efficiency of lead-free ferroelectric ceramics, the ternary Bi0.5Na0.5TiO3-SrTiO3-BaZrO3 ferroelectric system was studied. All ceramics were fabricated by a conventional solid-state reaction method and sintered at 1150 oC for 2 h. The crystal structure, electric-field-induced polarization, energy storage density, and efficiency properties of all samples were analyzed. The X-ray diffraction patterns show that the addition of BaZrO3 in the Bi0.5Na0.5TiO3-SrTiO3 system influences a phase transition from tetragonal to a pseudocubic structure. The electric field-induced-polarization loops confirm the phase transition from ferroelectric to relaxor in Bi0.5Na0.5TiO3-SrTiO3-BaZrO3 ceramics, which increases the energy storage density and efficiency of the samples. The energy storage density and efficiency of pure Bi0.5Na0.5TiO3-SrTiO3 (x = 0) were ~ 0.2 J/cm3 and ~ 29%. The addition of 1% BaZrO3 increases the energy storage density and efficiency of the sample to ~0.4 J/cm3 and ~74%. The further increase in the BaZrO3 content to x = 0.03 shows the energy storage density of ~ 0.38 J/cm3 with an energy storage efficiency of ~ 97%. The results indicate promising lead-free ferroelectric ceramic candidates for energy storage capacitor applications."

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JST: Engineering and Technology for Sustainable Development

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