Structural and impedance spectroscopy study of Samarium modified Barium Zirconium Titanate ceramic prepared by mechanochemical route

被引：56

作者：

Badapanda, T. ^{[1
]}

Sarangi, S. ^{[2
]}

Behera, B. ^{[2
]}

Anwar, S. ^{[3
]}

机构：

[1] CV Raman Coll Engn, Dept Phys, Bhubaneswar 752054, Odisha, India

[2] Sambalpur Univ, Sch Phys, Jyoti Vihar Sambalpur 768019, Odisha, India

[3] Inst Minerals & Mat Technol, Bhubaneswar 751013, Orissa, India

来源：

CURRENT APPLIED PHYSICS | 2014年 / 14卷 / 09期

关键词：

High energy ball milling; Dielectric relaxation; Impedance spectroscopy; Negative temperature coefficient; AC conductivity; DIELECTRIC-PROPERTIES; ELECTRICAL-PROPERTIES; THIN-FILMS; RELAXATION; CONDUCTION;

D O I：

10.1016/j.cap.2014.06.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Samarium modified Barium Zirconium Titanate (BZT) ceramics with general formula [Ba1-xSm2x/3](Zr0.05Ti0.95O3) [x = 0, 0.01, 0.02, 0.03 and 0.04] have been prepared by high energy ball milling. The Rietveld refinement of BaZr0.05Ti0.95O3 (BZT) shows a single phase tetragonal symmetry with space group P4mmm and TEM micrograph shows that the crystalline size is in the submicron range. X-ray diffraction (XRD) patterns confirm that no phase change occurs with the addition of Samarium in BZT upto x <= 0.03 and a small pyrochlore phase exists at x = 0.04. The complex impedance (Nyquist) plots display a single semicircle highlighting the influence of grain resistance on the electrical behavior. Negative temperature coefficient of resistance behavior is observed in all compositions. The activation energy calculated from Z '' and DC conductivity confirms that the oxygen vacancies play an important role in the conduction mechanism. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1192 / 1200

页数：9

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