Phase diagram and structure evolution mechanism in ultrahigh energy storage NaNbO3-based superparaelectric relaxor ferroelectric ceramics

被引：3

作者：

Dai, Kai ^{[1
]}

Li, Yafang ^{[1
]}

Yan, Yuting ^{[1
]}

Liu, Zhen ^{[2
]}

Cui, Anyang ^{[3
]}

Jiang, Kai ^{[1
]}

Shang, Liyan ^{[1
]}

Li, Yawei ^{[1
]}

Wang, Genshui ^{[2
]}

Hu, Zhigao ^{[1
,4
]}

机构：

[1] East China Normal Univ, Tech Ctr Multifunct Magneto Opt Spect Shanghai, Engn Res Ctr Nanophoton & Adv Instrument, Sch Phys & Elect Sci,Minist Educ,Dept Phys, Shanghai 200241, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, Shanghai 200050, Peoples R China

[3] Shanghai Normal Univ, Dept Phys, Key Lab Optoelect Mat & Device, Shanghai 200234, Peoples R China

[4] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

来源：

PHYSICAL REVIEW B | 2024年 / 109卷 / 19期

基金：

中国国家自然科学基金;

关键词：

Crystal atomic structure - Crystal lattices - Energy gap - Energy storage - Ferroelectric materials - Optical lattices - Phonons - Temperature;

D O I：

10.1103/PhysRevB.109.195204

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The construction of superparaelectric (SPE) systems has been demonstrated to be an essential means of enhancing energy storage properties, while the underlying physical behavior is still unclear. Here, the structure evolution of SPE was investigated on (1-x)(0.85NaNbO3-0.15Sr0.7Bi0.2TiO3)-xBi(Mg0.5Zr0.5)O3 (NN-SBTBMZ) ceramics by analyzing the lattice structure and electronic transitions behavior under the regulation of chemical content and temperature. The cell volume and optical band gap has been enhanced significantly, with increasing the doping contents. Moreover, the detailed phase diagram of NN-SBT-BMZ with a temperature content was derived by combining the evolution of dielectric, optical transitions, lattice structure, and phonon behavior under thermodynamic field, in which the evolution of the lattice structure is closely related to the domain structure. Noteworthy, the oscillatory processes of the main phonons near the TB temperature clearly reflect the relaxation state of the lattice structure, which is caused by the fact that the static displacements of the atoms in the crystal with respect to their equilibrium positions do not occur simultaneously. This work describes the comprehensive study of structural properties on NaNbO3-based SPE ceramics, which display positive implications for the development of energy storage capacitors.

引用

页数：9

共 45 条

[1] CALCULATIONS OF DIELECTRIC-PROPERTIES FROM THE SUPERPARAELECTRIC MODEL OF RELAXORS [J].