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Improved Dielectric and Energy Storage Properties of Ba0.8Ca0.2TiO3 Ceramics by Doping Ba(Mg1/3Nb2/3)O3
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2021-03-13 , DOI: 10.1002/pssa.202100062 Yucong Zhang 1 , Chen Wu 1 , Yu Fang 1 , Changyi Liu 2 , Wenwei Ge 1 , Hongwei Zhao 3 , Hongming Yuan 4
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2021-03-13 , DOI: 10.1002/pssa.202100062 Yucong Zhang 1 , Chen Wu 1 , Yu Fang 1 , Changyi Liu 2 , Wenwei Ge 1 , Hongwei Zhao 3 , Hongming Yuan 4
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Lead-free Ba0.8Ca0.2TiO3–xmol%Ba(Mg1/3Nb2/3)O3 (abbreviated as BCT20–xBMN, x = 0–8) ceramics are fabricated by a conventional solid-state reaction method. All BCT20–xBMN ceramics have pure perovskite phases which gradually change from tetragonal phase to cubic phase. The average grain size decreases significantly from ≈23 to ≈1.2 μm with the increase in BMN content. The Tm corresponding to the dielectric maximum of BCT20–xBMN decreases with the increase in x, and the room temperature dielectric constant increases significantly. The recoverable energy storage density Wrec and efficiency η% are enhanced to 0.17 J cm−3 and 81.3% for BCT20–6BMN due to the reduced remanent polarization by BMN doping. The Wrec increases with increasing temperature and shows peak values near the Tm. The η% of BCT20–6BMN and BCT20–7BMN has good temperature stability due to enhanced relaxor behavior.
中文翻译：
Ba（Mg1 / 3Nb2 / 3）O3掺杂改善Ba0.8Ca0.2TiO3陶瓷的介电和储能性能
无铅Ba 0.8 Ca 0.2 TiO 3 – x mol％Ba（Mg 1/3 Nb 2/3）O 3（缩写为BCT20– x BMN，x = 0-8）陶瓷是通过常规的固态反应制备的方法。所有BCT20– x BMN陶瓷均具有纯钙钛矿相，并逐渐从四方相变为立方相。随着BMN含量的增加，平均晶粒尺寸从≈23微米显着降低到≈1.2μm。所述Ť米对应于BCT20-的电介质最大X BMN与增加而减小X，并且室温介电常数显着增加。由于BMN掺杂减少了剩余极化，BCT20-6BMN的可回收能量存储密度W rec和效率η％分别提高到0.17 J cm -3和81.3％。所述W¯¯ REC增加与附近的温度升高，并显示峰值Ť米。BCT20–6BMN和BCT20–7BMN的η％由于弛豫性能增强而具有良好的温度稳定性。
更新日期：2021-05-19
中文翻译：
Ba（Mg1 / 3Nb2 / 3）O3掺杂改善Ba0.8Ca0.2TiO3陶瓷的介电和储能性能
无铅Ba 0.8 Ca 0.2 TiO 3 – x mol％Ba（Mg 1/3 Nb 2/3）O 3（缩写为BCT20– x BMN，x = 0-8）陶瓷是通过常规的固态反应制备的方法。所有BCT20– x BMN陶瓷均具有纯钙钛矿相，并逐渐从四方相变为立方相。随着BMN含量的增加，平均晶粒尺寸从≈23微米显着降低到≈1.2μm。所述Ť米对应于BCT20-的电介质最大X BMN与增加而减小X，并且室温介电常数显着增加。由于BMN掺杂减少了剩余极化，BCT20-6BMN的可回收能量存储密度W rec和效率η％分别提高到0.17 J cm -3和81.3％。所述W¯¯ REC增加与附近的温度升高，并显示峰值Ť米。BCT20–6BMN和BCT20–7BMN的η％由于弛豫性能增强而具有良好的温度稳定性。
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