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Dielectric properties anomaly of (1−x)Pb(Ni1/3Nb2/3)O3−xPbTiO3 ceramics near the morphotropic phase boundary

Published online by Cambridge University Press:  26 November 2012

Zhenrong Li ,
Liangying Zhang  and
Xi Yao
Zhenrong Li
Affiliation:
Electronic Materials Research Laboratory, Xi'an Jiaotong University, Xi'an 710049, China
Liangying Zhang
Affiliation:
Electronic Materials Research Laboratory, Xi'an Jiaotong University, Xi'an 710049, China
Xi Yao
Affiliation:
Electronic Materials Research Laboratory, Xi'an Jiaotong University, Xi'an 710049, China
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Abstract

Dielectric properties and the phase compositions of (1−x)Pb(Ni1/3Nb2/3)O3−xPbTiO3 ceramics were investigated. A morphotropic phase boundary (MPB) in the system between pseudocubic and tetragonal phase regions has been identified to lie in the composition range x = 0.34–0.38 by means of x-ray diffraction and dielectric measurements. The samples of composition lying near the MPB have good dielectric properties, but at the same time, exhibit two dielectric peaks. The possible reasons for the occurrence of dielectric bipeaks are discussed. One dielectric peak is phase transition peak, and the other peak lying in 130–150 °C temperature range is suggested to result from structure defects in the ceramics.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 3 , March 2001 , pp. 834 - 836
Copyright
Copyright © Materials Research Society 2001

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References

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