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Grain size engineered Ba0.9Sr0.1Ti0.9Hf0.1O3‐Na0.5Bi0.5TiO3 relaxor ceramics with improved energy storage performance
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2020-06-30 , DOI: 10.1111/jace.17346 Aditya Jain 1 , Yingang Wang 1 , Hao Guo 1 , Neng Wang 1
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2020-06-30 , DOI: 10.1111/jace.17346 Aditya Jain 1 , Yingang Wang 1 , Hao Guo 1 , Neng Wang 1
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Novel lead‐free diphasic (1‐x)Ba0.9Sr0.1Ti0.9Hf0.1O3‐xNa0.5Bi0.5TiO3 (BSTH‐NBT) ceramic nanocomposites were synthesized via an economically viable modified mechano‐chemical activation technique. In the present investigation, we have developed an energy storage composite material by systematically optimizing the charge transport behavior and charge storage characteristics between the ferroelectric BSTH and piezoelectric NBT phase. The composite with x = 0.09 NBT concentration has shown the best energy storage properties with 1.61 J/cm3 discharge energy density along with 80.1% energy efficiency. The BSTH and NBT had a synergetic effect on the ferroelectric properties of the composites. The improvement in ferroelectric and piezoelectric properties along with excellent aging characteristics in composite materials is mainly attributed to enhancement in microstructural density, grain boundary interface, and stress effects. The improved dispersibility and excellent compatibility between BSTH and NBT phase have resulted in approximately 20% enhancement in breakdown strength of composite compared to pure BSTH ceramic.
中文翻译：
晶粒尺寸工程化的Ba0.9Sr0.1Ti0.9Hf0.1O3-Na0.5Bi0.5TiO3弛豫陶瓷，具有改善的储能性能
通过经济上可行的改良机械化学活化技术合成了新型无铅双相（1 x）Ba 0.9 Sr 0.1 Ti 0.9 Hf 0.1 O 3 - x Na 0.5 Bi 0.5 TiO 3（BSTH-NBT）陶瓷纳米复合材料。在本研究中，我们通过系统地优化铁电BSTH和压电NBT相之间的电荷传输行为和电荷存储特性，开发了一种储能复合材料。x = 0.09 NBT浓度的复合材料具有1.61 J / cm 3的最佳储能性能排放能量密度以及80.1％的能量效率。BSTH和NBT对复合材料的铁电性能具有协同作用。复合材料中铁电和压电性能的改善以及出色的时效特性，主要归因于显微组织密度，晶界界面和应力效应的增强。与纯BSTH陶瓷相比，BSTH和NBT相之间分散性的提高和优异的相容性使复合材料的击穿强度提高了约20％。
更新日期：2020-06-30
中文翻译：
晶粒尺寸工程化的Ba0.9Sr0.1Ti0.9Hf0.1O3-Na0.5Bi0.5TiO3弛豫陶瓷，具有改善的储能性能
通过经济上可行的改良机械化学活化技术合成了新型无铅双相（1 x）Ba 0.9 Sr 0.1 Ti 0.9 Hf 0.1 O 3 - x Na 0.5 Bi 0.5 TiO 3（BSTH-NBT）陶瓷纳米复合材料。在本研究中，我们通过系统地优化铁电BSTH和压电NBT相之间的电荷传输行为和电荷存储特性，开发了一种储能复合材料。x = 0.09 NBT浓度的复合材料具有1.61 J / cm 3的最佳储能性能排放能量密度以及80.1％的能量效率。BSTH和NBT对复合材料的铁电性能具有协同作用。复合材料中铁电和压电性能的改善以及出色的时效特性，主要归因于显微组织密度，晶界界面和应力效应的增强。与纯BSTH陶瓷相比，BSTH和NBT相之间分散性的提高和优异的相容性使复合材料的击穿强度提高了约20％。
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