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Synchrotron texture analysis of thick BiFeO<inf>3</inf>-PbTiO<inf>3</inf> layers synthesised by tape casting using Aurivillius and non-Aurivillius templates

DOI: 10.1109/ISAF.2012.6297816 DOI Help

Authors: Meghdad Palizdar (University of Leeds) , Tim Comyn (University of Leeds) , Stephen F. Poterala , Gary L. Messing , Ender Suvaci , Annette Kleppe (Diamond Light Source) , Andrew Jephcoat (Diamond Light Source) , Andrew Bell (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp
Peer Reviewed: No

State: Published (Approved)
Published: July 2012

Abstract: The solid solution between bismuth ferrite and lead titanate (xBiFeO 3 -(1-x)PbTiO 3 or BFPT) possesses a morphotropic phase boundary (MPB) between the rhombohedral and tetragonal forms at x=0.7. It is of interest to investigate the influence of field-driven rhombohedral-tetragonal phase transitions across the MPB, to determine whether correctly oriented BFPT can provide both giant piezoelectric properties and significant magnetoelectric coupling. Here, we used the reactive templated grain growth (RTGG) technique to prepare crystallographically textured 0.6BiFeO 3 -0.4PbTiO 3 (60:40 BFPT) ceramics. Both Aurivillius structure templates (Bi 4 Ti 3 O 12 and PbBi 4 Ti 4 O 15 ) and perovskite templates (BaTiO 3 and SrTiO 3 ) were used to prepare textured 60:40BFPT. Synchrotron radiation experiments were used to determine the degree of texture. A current data suggests that only BaTiO 3 templates survive the sintering process, and other candidate template materials reacted with the 60:40BFPT matrix at high temperature. In the case of SrTiO 3 , this reaction results in a low Curie temperature (T c = 350°C) due to the substitution of Sr 2+ . Aurivillius templates resulted in high Curie temperatures (610°C) and may be chemically suitable if they could be stabilized during the sintering process. However, the resulting ceramics show low remanent polarization (P r = 3 μc/cm 2 ), while SrTiO 3 and BaTiO 3 templated ceramics show higher remanent polarizations of 36 and 30 μc/cm 2 , respectively. Because of their high chemical stability in this system, BaTiO 3 templates appear to be the best candidate for fabricating textured BFPT by the TGG method, displaying a high degree of crystallographic texture.

Subject Areas: Technique Development

Instruments: I15-Extreme Conditions

Added On: 18/01/2013 11:07

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