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Journal of Materials Science: Materials in Electronics
Published in: Journal of Materials Science: Materials in Electronics 24/2019

09-11-2019

The effect of Sr doping on structural and dielectric properties of Ba2Co2Fe12O22 ceramics

Authors: Q. S. Fu, X. H. Chen, C. Chakrabarti, C. L. Li, J. Zheng, Y. H. Li, Y. Qiu, B. Meng, S. L. Yuan

Published in: Journal of Materials Science: Materials in Electronics | Issue 24/2019

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Abstract

Polycrystalline Ba2−xSrxCo2Fe12O22 (0 ≤ x≤0.5) ceramics have been synthesized by the conventional solid-state-reaction method. From the analysis of X-ray diffraction and scanning electron microscopy, it can be obtained that the lattice parameters decrease monotonically with the increase in Sr doping content, while the average grain size presents a complicated trend. The dielectric measurements show that dielectric constants of all samples are larger than 103 over a wide range of temperature and frequency (300–650 K and 1 kHz–1 MHz), which is identified as colossal dielectric constant. However, with the rise in Sr doping content, disparate evolutions of dielectric constant are found at 300 K and 600 K. A detailed study of dielectric response, impedance spectra and conductivity analysis suggest that the variation of dielectric constant at 300 K is dominated by the activation energy of relaxation, while that at 600 K is mainly in connection with the average grain size.
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Metadata
Title
The effect of Sr doping on structural and dielectric properties of Ba2Co2Fe12O22 ceramics
Authors
Q. S. Fu
X. H. Chen
C. Chakrabarti
C. L. Li
J. Zheng
Y. H. Li
Y. Qiu
B. Meng
S. L. Yuan
Publication date
09-11-2019
Publisher
Springer US
Published in
Journal of Materials Science: Materials in Electronics / Issue 24/2019
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-019-02477-5

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