首页|0.94(Bi0.5Na0.5TiO3)-0.06BaTiO3掺杂铌酸钠基反铁电陶瓷的储能特性研究

0.94(Bi0.5Na0.5TiO3)-0.06BaTiO3掺杂铌酸钠基反铁电陶瓷的储能特性研究

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利用Bi3+、Ba2+取代A位Na+,利用Ti4+取代B位Nb5+,以增强NaNbO3基陶瓷的弛豫特性,获得较低的剩余极化强度.同时,Bi3+6s和O2-2p之间的轨道杂化及高极化率的Ba2+的引入有利于陶瓷获得高极化强度,提高其储能特性.在此基础上,设计了(1-x)NaNbO3-x[0.94(Bi0.5Na0.5TiO3)-0.06BaTiO3](NN-x(BNT-BT),x=0.20,0.25,0.30,0.35)陶瓷体系,结合轧膜成型工艺,在1140~1160℃保温2 h制备出致密性良好的厚膜陶瓷样品.结果表明,随着BNT-BT掺杂量的增加,陶瓷的击穿强度明显提高.在外加电场为550 kV·cm-1时,NN-0.35(BNT-BT)陶瓷的储能性能达到最优,储能密度和效率分别为6.7 J·cm-3和79.67%.在外加电场为300 kV·cm-1下,25~120℃温度范围内,NN-0.35(BNT-BT)陶瓷的储能密度和效率变化率分别为9%和7%;在10~500 Hz频率范围内,储能密度和效率变化率分别为3%和5%,表现出优异的温度和频率稳定性.此外,NN-0.35(BNT-BT)陶瓷兼具较高的功率密度(261.014 MW·cm-3)和较快的放电时间(19 ns),在脉冲电容器领域存在巨大的应用前景.
Energy storage properties of sodium niobate based antiferroelectric ceramics doped with 0.94(Bi0.5Na0.5TiO3)-0.06BaTiO3
Bi3+and Ba2+was used to replace Na+at the A-site,and Ti4+was used to replace Nb5+at the B-site to enhance the relaxor properties of NaNbO3-based ceramics,resulting in lower remnant polarization and improved energy storage characteristics. Additionally,the orbital hybridization between Bi3+6s and O2-2p,as well as the introduction of highly polarizable Ba2+,contributes to achieving higher maximum polarization. Based on this,combined with viscous polymer rolling process (VPRP),the composition of (1-x)NaNbO3-x[0.94(Bi0.5Na0.5TiO3)-0.06BaTiO3](NN-x(BNT-BT),x=0.20,0.25,0.30 and 0.35) was designed and dense thick film ceramics were prepared at 1140 ℃ to 1160 ℃ for 2 h. The results show that with an increase in BNT-BT doping content,the breakdown strength of NN-x(BNT-BT) ceramics can be significantly improved. Under an applied electric field of 550 kV·cm-1,the NN-0.35(BNT-BT) ceramic exhibits optimal energy storage performance with energy density of 6.7 J·cm-3 and energy efficiency of 79.67%. Under an electric field of 300 kV·cm-1 and temperature range of 25-120 ℃,the NN-0.35(BNT-BT) ceramic shows good temperature stability,with variations in energy density and efficiency of 9% and 7%,respectively. Meanwhile,within a frequency range of 10-500 Hz,the variations in energy density and efficiency are 3% and 5%,respectively,demonstrating excellent frequency stability. Furthermore,the NN-0.35(BNT-BT) ceramic possesses high power density (261.014 MW·cm-3) and fast discharge time (19 ns),indicating great potential for application in the pulse capacitors field.

NaNbO3rolling processrelaxation characteristicsenergy storage characteristics

张丹阳、田晶晶、曹月丛、展敏园、徐永豪

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河南理工大学 物理与电子信息学院,河南 焦作 454003

NaNbO3 轧膜工艺 弛豫特性 储能特性

国家自然科学基金青年科学基金河南省科技攻关项目河南省科技攻关项目河南理工大学杰出青年科学基金项目

51702089212102210177222102230026J2022-4

2024

电子元件与材料
中国电子学会 中国电子元件行业协会 国营第715厂(成都宏明电子股份有限公司)

电子元件与材料

CSTPCD北大核心
影响因子:0.491
ISSN:1001-2028
年,卷(期):2024.43(8)
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