Low loss and high dielectric BaTiO3@Al2O3 Core@Shell novel nanostructures by heteronucleation method

被引：2

作者：

Behera, Sushil Kumar ^{[1
]}

Panda, Maheswar ^{[1
]}

机构：

[1] Dr Hari Singh Gour Vishwavidyalaya, Dept Phys, Multifunct Polymer Nanocomposites Lab, A Cent Univ, Sagar 470003, MP, India

来源：

CHEMICAL PHYSICS LETTERS | 2024年 / 841卷

关键词：

Heteronucleation method; Dielectric constant; Dielectric loss; Core@Shell nano structures; Electric modulus; Relaxation; Ferroelectric hysteresis; BARIUM-TITANATE; ENERGY-STORAGE; BATIO3; TEMPERATURE; COMPOSITES; FILMS;

D O I：

10.1016/j.cplett.2024.141172

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

As-purchased BaTiO3, hydrothermally prepared BaTiO3, and BaTiO3@Al2O3 core@shell nanostructures through heteronucleation method were confirmed for structure/microstructure through XRD/ FESEM/HRTEM. High static dielectric constant of 2450 is obtained for BaTiO3@Al2O3 with a very low loss tangent (Tan delta similar to 0.1), due to the outer thick insulating Al2O3 layer over BaTiO3. Jonscher's law and Modulus spectra show a non-Debye type broad relaxation obeying a modified KWW function for BaTiO3, with no relaxation for BaTiO3@Al2O3, due to the suppression of dipoles by Al2O3. Higher dielectric field strength of >= 20 kV/cm was observed for BaTiO3@Al2O3 through the ferroelectric hysteresis loops.

引用

页数：7

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