Structure and Electrical Conductivity of Irradiated BaTiO3 Nanoparticles

被引：10

作者：

Ahmed, Basheer Shameer ^{[1
]}

Nandaprakash, Mysuru Basavaraju ^{[1
]}

Namratha, Keerthiraj ^{[1
]}

Byrappa, Kullaiah ^{[1
]}

Somashekar, Rudrappa ^{[1
]}

机构：

[1] Vijnana Bhavana, Ctr Mat Sci, Mysuru 570006, Karnataka, India

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2018年 / 255卷 / 06期

关键词：

BaTiO3; nanoparticles; Cole-Cole plot; dielectric properties; gamma irradiation; hydrothermal synthesis; BARIUM-TITANATE; HYDROTHERMAL SYNTHESIS; DIELECTRIC-PROPERTIES; PARTICLES; POWDERS; FINE; FILMS;

D O I：

10.1002/pssb.201700581

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effects of gamma irradiation on hydrothermally synthesized BaTiO3 nanoparticles have been investigated. Gamma irradiation is carried out at room temperature from 0, 50, 100, 150, 200kGy to maximum dosage up to 250kGy with Co-60 source. Prepared BaTiO3 nanoparticles are investigated using line profile analysis employing X-ray diffraction (XRD) data; the structure, size, dielectric and conductivity properties of the BaTiO3 are studied using Raman spectroscopy, transmission electron microscopy (TEM), and impedance analyzer. The post-irradiation volume of the BaTiO3 unit cell increases with dosage and most of the cells possess a modified tetragonal structure. The Gruneisen constant is high for 242cm(-1) optical modes with 150kGy and lowest for 516cm(-1) optical mode for 50kGy irradiation. The morphology changes and particle size decreases as the radiation dose is increased. Conductivity (sigma) increases with the increase in radiation dose, especially at 50kGy. Cole-Cole plot is suggestive of the depolarization nature of irradiated BaTiO3 nanoparticles.

引用

页数：7

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