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Correlation Between Large Electrostrictive Strain and Relaxor Behavior with Structural Changes Induced in P(VDF-TrFE) Copolymer by Electron Irradiation

Published online by Cambridge University Press:  10 February 2011

Vivek Bharti ,
Yaohong Ye ,
T.-B. Xu  and
Q. M. Zhang
Vivek Bharti
Affiliation:
Materials Research Laboratory, Pennsylvania State University, University Park, PA 16802
Yaohong Ye
Affiliation:
Materials Research Laboratory, Pennsylvania State University, University Park, PA 16802
T.-B. Xu
Affiliation:
Materials Research Laboratory, Pennsylvania State University, University Park, PA 16802
Q. M. Zhang
Affiliation:
Materials Research Laboratory, Pennsylvania State University, University Park, PA 16802
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Abstract

The effect of high energy electron irradiation is investigated on poly(vinylidene fluoridetrifluoroethylene), P(VDF-TrFE), copolymers in the broad range of irradiation doses and temperature. It was found that after a suitable electron irradiation condition, ferroelectric polymer materials show exceptionally high electrostrictive response (> 4%), high dielectric constant (>60) with low dielectric loss over a broad temperature range. In addition, the material after irradiation exhibits many features resembling those of a relaxor ferroelectric, suggesting that the electron irradiation breaks up the coherent polarization domain in a normal ferroelectric material into micro-polar regions that transform the material into a relaxor ferroelectric. These distinct features make this material very attractive for a broad range of applications. In this paper we will review the experimental results on various characteristics of material properties including the dielectric and electrostrictive strain response induced at different temperatures under different electron irradiation conditions and their relation with structural changes observed by X-ray and DSC.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 541: Symposium O – Ferroelectric Thin Films VII , 1998 , 653
Copyright
Copyright © Materials Research Society 1999

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References

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