Effect of thermal history on structural, microstructural properties and J - E characteristics of CaCu3Ti4O12 polycrystalline ceramic

被引：25

作者：

Raval, P. Y. ^{[1
]}

Makadiya, A. R. ^{[1
]}

Pansara, P. R. ^{[1
]}

Sharma, P. U. ^{[2
]}

Vasoya, N. H. ^{[3
]}

Bhalodia, J. A. ^{[1
]}

Kumar, Sudhish ^{[4
,5
]}

Dolia, S. N. ^{[4
,5
]}

Modi, K. B. ^{[1
]}

机构：

[1] Saurashtra Univ, Dept Phys, Rajkot 360005, Gujarat, India

[2] MN Coll, Visnagar 384315, India

[3] Sanjaybhai Rajguru Sci Coll, Dept Phys, Rajkot 360003, Gujarat, India

[4] Mohanlal Sukhadia Univ, Dept Phys, Udaipur 313002, India

[5] Univ Rajasthan, Dept Phys, Jaipur 302004, Rajasthan, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2018年 / 212卷

关键词：

CaCu3Ti4O12; Nonlinear I-V characteristics; Structural-microstructural properties; CALCIUM-COPPER-TITANATE; DIELECTRIC-PROPERTIES; NONOHMIC BEHAVIOR; SPINEL FERRITE; THIN-FILMS;

D O I：

10.1016/j.matchemphys.2018.03.041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report, the effect of heat treatments slow cooling, rapid thermal cooling (quenching) and microwave-assisted heating, on structural, microstructural and J - E characteristics of CaCu3Ti4O12 polycrystalline ceramic. Rietveld refinement of X-ray data confirms the emergence of the mono-phasic cubic perovskite structure, diffraction line broadening and change in the relative intensity of diffraction peaks while scanning electron microscopy revealed completely different grain morphology. The observed modifications have been discussed in detail. The strong nonlinear J - E characteristics over the wide temperature range (300-823 K) indicated the existence of a Schottky-type electrostatic potential barrier at the grain boundaries. The parameters, nonlinear coefficient, threshold electric field, potential barrier height suggest suitability of the materials for low voltage varistor applications. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：343 / 350

页数：8

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