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Dielectric properties of BNT-xBT prepared by hydrothermal process

Natheer B. Mahmood

Physics Department, College of Science, Al-Nahrain University, Baghdad, Iraq

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and

Emad K. Al-Shakarchi

Physics Department, College of Science, Al-Nahrain University, Baghdad, Iraq

E-mail Address: eks2000@hotmail.com

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https://doi.org/10.1142/S2010135X17500199Cited by:13 (Source: Crossref)

Abstract

The BNT ceramic sample might be a good replacement for PZT piezoelectric in industrial applications, especially in energy harvesting from crystal vibrations. In order to enhance the performance of BNT ceramic, the solid solution was chosen by substitution with Ba $^{+2}$ at Morphtropic Phase Boundary (MPB). The BNT- $x$ BT powders with $x = 1$ , 0.07, 0.06 and 0 were prepared by the hydrothermal method with average particle size (65–150nm) at (90 $^{\circ}$ C/72h). The ceramic disc was sintered at (1150 $^{\circ}$ C/4h) and showed excellent relative density of about 96%. The results of X-ray diffraction (XRD) confirmed the MPB for $x = 0.06$ and 0.07, while the BNT had a rhombohedral structure and BT had a tetragonal structure. The dielectric measurements showed that BNT, BNT-7BT, BNT-6BT behave as the relaxator ferroelectric and showed a strong dependence on frequency, especially in the MPB region while BT behaves as a normal ferroelectric. Both the Curie temperature and depolarization temperature decrease at the MPB region and showed strong dependency on frequency.

Keywords:

References

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Vol. 07, No. 03

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History

Received 1 April 2017

Revised 18 May 2017

Accepted 19 May 2017

Published: 22 June 2017

Information

This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 4.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited.

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Dielectric properties of BNT-xBT prepared by hydrothermal process

Abstract

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