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Tailored wide-frequency dielectric behavior of polyimide composite films with BaxSr1-xTiO3 perovskites ceramic particles

Tailored wide-frequency dielectric behavior of polyimide composite films with BaxSr1-xTiO3 perovskites ceramic particles
Tailored wide-frequency dielectric behavior of polyimide composite films with BaxSr1-xTiO3 perovskites ceramic particles
A series of BaxSr1-xTiO3 (x=0.2, 0.4 and 0.6, BST) ferroelectric ceramics were prepared by conventional solid state reaction method. Crystal structure, surface morphology and dielectric properties of the BST ceramics and polyimide (PI)/BST composite films were analyzed using X-ray diffraction, scanning electron microscopy and dielectric spectroscopy, respectively. As the value of x increases from 0.2 to 0.6, the dielectric permittivity (E) of PI/BST composite films increased, while their dielectric loss (tan d) decreased. The PI/Ba0.6Sr0.4TiO3 composite films possessed the larger E of 24 at 102 Hz, which is almost twice higher than that of the PI/Ba0.2Sr0.8TiO3 one. It was attributed to the Maxwell-Wagner behavior between PI matrix and BST ceramic particles, resulting in the larger E of ceramics. Besides, the PI/Ba0.6Sr0.4TiO3 demonstrated the lower tan d of 0.004 at 102 Hz, which showed broad temperature dependence. Therefore, the PI/Ba0.6Sr0.4TiO3 flexible material has a potential application as excellent microwave dielectrics.
113-120
Zha, Junwei
988918c3-b4c6-4722-8dff-935625954b09
Liu, Qian
68aeec50-d19c-4e3a-8e5b-5b0692f57e1f
Dang, Zhimin
6ff3e294-e350-408d-8a69-1b0018876ffa
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819
Zha, Junwei
988918c3-b4c6-4722-8dff-935625954b09
Liu, Qian
68aeec50-d19c-4e3a-8e5b-5b0692f57e1f
Dang, Zhimin
6ff3e294-e350-408d-8a69-1b0018876ffa
Chen, George
3de45a9c-6c9a-4bcb-90c3-d7e26be21819

Zha, Junwei, Liu, Qian, Dang, Zhimin and Chen, George (2016) Tailored wide-frequency dielectric behavior of polyimide composite films with BaxSr1-xTiO3 perovskites ceramic particles. IEEE Transactions on Dielectrics & Electrical Insulation, 23 (1), 113-120. (doi:10.1109/TDEI.2015.005162).

Record type: Article

Abstract

A series of BaxSr1-xTiO3 (x=0.2, 0.4 and 0.6, BST) ferroelectric ceramics were prepared by conventional solid state reaction method. Crystal structure, surface morphology and dielectric properties of the BST ceramics and polyimide (PI)/BST composite films were analyzed using X-ray diffraction, scanning electron microscopy and dielectric spectroscopy, respectively. As the value of x increases from 0.2 to 0.6, the dielectric permittivity (E) of PI/BST composite films increased, while their dielectric loss (tan d) decreased. The PI/Ba0.6Sr0.4TiO3 composite films possessed the larger E of 24 at 102 Hz, which is almost twice higher than that of the PI/Ba0.2Sr0.8TiO3 one. It was attributed to the Maxwell-Wagner behavior between PI matrix and BST ceramic particles, resulting in the larger E of ceramics. Besides, the PI/Ba0.6Sr0.4TiO3 demonstrated the lower tan d of 0.004 at 102 Hz, which showed broad temperature dependence. Therefore, the PI/Ba0.6Sr0.4TiO3 flexible material has a potential application as excellent microwave dielectrics.

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Accepted/In Press date: 10 August 2015
Published date: February 2016
Organisations: EEE

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Local EPrints ID: 402977
URI: http://eprints.soton.ac.uk/id/eprint/402977
PURE UUID: fff8615b-cf40-4ede-ac8c-cab3b3dc2d01

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Date deposited: 21 Nov 2016 14:05
Last modified: 09 Dec 2019 19:22

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Contributors

Author: Junwei Zha
Author: Qian Liu
Author: Zhimin Dang
Author: George Chen

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