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Crystallographic phases, phase transitions, and barrier layer formation in (1 − x) [Pb(Fe1/2Nb1/2)O3]−xPbTiO3

Published online by Cambridge University Press:  31 January 2011

Satendra Pal Singh ,
Akhilesh Kumar Singh ,
Dhananjai Pandey ,
H. Sharma  and
Om Parkash
Satendra Pal Singh
Affiliation:
School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi-221 005, India
Akhilesh Kumar Singh
Affiliation:
School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi-221 005, India
Dhananjai Pandey*
Affiliation:
School of Materials Science and Technology, Institute of Technology, Banaras Hindu University, Varanasi-221 005, India
H. Sharma
Affiliation:
University Department of Physics, Veer Kunwar Singh University, Arrah-802 301, India
Om Parkash
Affiliation:
Department of Ceramic Engineering, Institute of Technology, Banaras Hindu University, Varanasi-221 005, India
*
a)Author to whom correspondence should be addressed. e-mail: [email protected]
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Abstract

Powders of (1 − x) Pb(Fe1/2Nb1/2)O3-xPbTiO3 (PFN-PT) with x = 0.00, 0.10, 0.13, 0.15, 0.20, and 0.25 were prepared by the conventional solid-state route. Structure of PFN-PT was tetragonal for x [H33356] 0.10, which indicates that the morphotropic phase boundary (MPB) may be between 0 < x < 0.10. The nature of phase transition in PFN-PT changed from diffuse ferroelectric to relaxor ferroelectric to normal ferroelectric on increasing the PT content. The effect of the PT content and sintering temperature on barrier layer formation in the PFN-PT system was studied using complex impedance spectroscopy. With increasing PT content, the possibility of the barrier layer formation decreased while with increasing sintering temperature, the barrier layer formation was promoted.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 11 , November 2003 , pp. 2677 - 2687
Copyright
Copyright © Materials Research Society 2003

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