Title :
Internal Stress and Phase Coexistence in Bismuth Ferrite-Lead Titanate Ceramics
Author :
Bell, Andrew J. ; Levander, Alejandro X. ; Turner, Stuart L. ; Comyn, Tim P.
Author_Institution :
Univ. of Leeds, Leeds
Abstract :
The large range of tetragonal and rhombohedral phase coexistence in BiFeO3-PbTiO3 slid solutions and the spontaneous disintegration of certain samples is investigated using X-ray diffraction. It is concluded that internal stress associated with the large spontaneous strain in the tetragonal phase is relieved by local transition to the lower volume rhombohedral phase. For larger grain sizes, microcracking provides an alternative route to stress relief.
Keywords :
X-ray diffraction; bismuth compounds; grain size; internal stresses; lead compounds; microcracks; piezoceramics; BiFeO3-PbTiO3; X-ray diffraction; bismuth ferrite-lead titanate ceramics; grain size; internal stress; microcracking; rhombohedral phase; tetragonal phase; Bismuth; Capacitive sensors; Ceramics; Ferroelectric materials; Grain size; Internal stresses; Magnetic field induced strain; Temperature; Titanium compounds; X-ray diffraction;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393280
