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Structural, dielectric and AC conductivity studies on 0.8Ba0.2(Bi0.5K0.5)Ti1-xZrxO3 lead free ceramic system

Materials Science-Poland
Volume 34 (2016): Issue 3 (September 2016)
By:
Open Access
|Sep 2016

Figures & Tables

Fig. 1

X-ray diffractograms of Zr substituted 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3 lead free ceramics.
X-ray diffractograms of Zr substituted 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3 lead free ceramics.

Fig. 2

Microstructure images of Zr substituted 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3 (x = 0.01 to 0.06) lead free ceramics.
Microstructure images of Zr substituted 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3 (x = 0.01 to 0.06) lead free ceramics.

Fig. 3

Variation of dielectric constant and dielectric loss as a function of temperature at different frequencies for 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3 (x = 0.01 to 0.06) lead free ceramics: (a) x = 0.01; (b) x = 0.02; (c) x = 0.03; (d) x = 0.04; (e) x = 0.05; (f) x = 0.06.
Variation of dielectric constant and dielectric loss as a function of temperature at different frequencies for 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3 (x = 0.01 to 0.06) lead free ceramics: (a) x = 0.01; (b) x = 0.02; (c) x = 0.03; (d) x = 0.04; (e) x = 0.05; (f) x = 0.06.

Fig. 4

Modified Curie-Weiss law for 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3(x = 0.01 and 0.06) lead free ceramics (solid line represents linear fitting): (a) x = 0.01; (b) x = 0.06.
Modified Curie-Weiss law for 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3(x = 0.01 and 0.06) lead free ceramics (solid line represents linear fitting): (a) x = 0.01; (b) x = 0.06.

Fig. 5

Frequency dependent AC conductivity for 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3(x = 0.01 and 0.06) lead free ceramics at different temperatures: (a) x = 0.01; (b) x = 0.06.
Frequency dependent AC conductivity for 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3(x = 0.01 and 0.06) lead free ceramics at different temperatures: (a) x = 0.01; (b) x = 0.06.

Fig. 6

Frequency dependent AC conductivity for 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3 at 450 °C (x = 0.01 to 0.06).
Frequency dependent AC conductivity for 0.8Ba0.2(Bi0.5K0.5)Ti1 - xZrxO3 at 450 °C (x = 0.01 to 0.06).

Various parameters as a function of Zr substitution in 0_8Ba0_2(Bi0_5K0_5)Ti1 - xZrxO3 (x = 0_01 to 0_06) lead free ceramics_

x0.010.020.030.040.050.06
a [Å]3.9954.0034.0124.0224.0324.045
c [Å]4.0964.1034.1114.1184.1264.133
c/a1.0251.02491.02461.02381.02331.0217
Theoretical density[kg/m3] [11, 15]586058405810579057605720
Exp. density[kg/m3]528452695253523452305222
εRT [1 kHz]165015501451140813611315
εmax [1 kHz]225620652078160515181466
tanδ (at RT for 1 kHz)0.320.290.250.20.170.11
γ[1 kHz]1.411.421.601.711.821.78
EAC[eV]0.280.340.370.230.180.14
DOI: https://doi.org/10.1515/msp-2016-0088 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 669 - 675
Submitted on: Feb 18, 2016
Accepted on: Jul 11, 2016
Published on: Sep 12, 2016
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year
Keywords:
lead free ceramics,
BaTiO Bi KTiO,
dielectric,
AC conductivity
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2016 M.N.V. Ramesh, K.V. Ramesh, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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