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.
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页数：7
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