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人工晶体学报 ›› 2026, Vol. 55 ›› Issue (6): 956-965.DOI: 10.16553/j.cnki.issn1000-985x.xb2026.0015

• 研究论文 • 上一篇    下一篇

Sr0.7M0.2TiO3(M=Bi、Sm、La、Gd)掺杂对(Bi0.5Na0.50.94Ba0.06TiO3陶瓷储能材料性能的影响

刘召林(), 邵辉(), 李健平   

  1. 江苏科技大学材料科学与工程学院,镇江 212003
  • 收稿日期:2026-01-29 出版日期:2026-06-20 发布日期:2026-07-07
  • 通信作者: 邵辉,博士,副教授。E-mail:huishao@just.end.cn
  • 作者简介:刘召林(1998—),男,云南省人,硕士研究生。E-mail:2993795852@qq.com

Effect of Sr0.7M0.2TiO3(M=Bi, Sm, La, Gd) Doping on Properties of (Bi0.5Na0.5)0.94Ba0.06TiO3 Ceramic Energy-Storage Materials

LIU Zhaolin(), SHAO Hui(), LI Jianping   

  1. School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China
  • Received:2026-01-29 Online:2026-06-20 Published:2026-07-07

摘要: 本文采用固相烧结法制备了0.95(Bi0.5Na0.50.94Ba0.06TiO3-0.05Sr0.7M0.2TiO3(M=Bi、Sm、La、Gd,BNBT-SMT)陶瓷储能材料,针对其晶体结构、介电温谱、铁电性能及储能性能展开研究。XRD结果表明,所有陶瓷样品在经过1 125 ℃烧结后均呈现单一的钙钛矿结构。介电温谱结果表明,所有陶瓷样品均呈现出弛豫铁电体的典型特征。掺杂Sr0.7M0.2TiO3后,样品的电滞回线曲线形态呈明显的演变趋势,其形状逐渐由较为宽阔且饱和极化值较大的“宽胖型”特征,向更为细窄、剩余极化强度较小且矫顽场强相对较低的“细长型”转变。同时最大极化强度(Pmax)得到明显的提高,进而改善了材料的储能性能。当M=Bi且外加电场为4 kV/mm时,有效储能密度达到最佳值Wrec=0.29 J·cm-3,其对应的储能效率η=51.4%。

关键词: 固相烧结; 钙钛矿; 钛酸铋钠; BNBT-SMT; 电滞回线; 储能性能

Abstract: In this paper,ceramic energy-storage materials of 0.95(Bi0.5Na0.50.94Ba0.06TiO3-0.05Sr0.7M0.2TiO3 (M=Bi,Sm,La,Gd,BNBT-SMT) were prepared by the solid-state sintering method,and their crystal structure,dielectric temperature spectra,ferroelectric properties,and energy-storage properties were investigated. XRD results show that all ceramic samples exhibit a single perovskite structure after sintering at 1 125 ℃. The dielectric temperature spectra indicate that all ceramic samples display typical characteristics of relaxor ferroelectrics. With Sr0.7M0.2TiO3 doping,shape of the hysteresis loop curves of samples exhibit an obvious evolution trend,and its shape gradually changes from the “wide fat type” characteristic with wider and larger saturation polarization value to the “slender type” with narrower,smaller remanent polarization intensity and relatively lower coercive field strength. Meanwhile,the maximum polarization intensity (Pmax) is significantly enhanced,thereby improving the energy-storage properties of the materials. When M=Bi and the applied electric field is 4 kV/mm,the recoverable energy-storage density reaches the optimal value of Wrec=0.29 J·cm-3,and the corresponding energy-storage efficiency of η= 51.4%.

Key words: solid-state sintering; perovskite; sodium bismuth titanate; BNBT-SMT; hysteresis loop; energy-storage property

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