Structure and properties of Fe-modified Na[subscript 0.5]Bi[subscript 0.5]TiO[subscript 3] at ambient and elevated temperature
- SFIT
Sodium bismuth titanate (NBT) ceramics are among the most promising lead-free materials for piezoelectric applications. This work reports the crystal structure and phase evolution of NBT and Fe-modified NBT (from 0-2 at.% Fe) using synchrotron x-ray diffraction and Raman spectroscopy, at both ambient and elevated temperatures. The crystallographic results are discussed with reference to permittivity and piezoelectric thermal depolarization measurements of the same compositions. Changes in the depolarization temperature due to Fe substitution were detected by Raman spectroscopy and were found to correlate closely with depolarization temperatures obtained from converse piezoelectric coefficient and permittivity measured in situ. The depolarization temperatures obtained from direct piezoelectric coefficient measured ex situ as well as the phase transition temperatures obtained from synchrotron x-ray diffraction were found to be at higher temperatures. The mechanisms underlying the relationship between permittivity and piezoelectric depolarization to structural transitions observed in Raman spectroscopy and x-ray diffraction are discussed.
- Research Organization:
- Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
- Sponsoring Organization:
- NSFU.S. ARMY RESEARCH
- OSTI ID:
- 1034551
- Journal Information:
- Phys. Rev. B, Journal Name: Phys. Rev. B Journal Issue: (2) ; 01, 2012 Vol. 85; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Chemical and structural effects on the high-temperature mechanical behavior of (1−x)(Na{sub 1/2}Bi{sub 1/2})TiO{sub 3}-xBaTiO{sub 3} ceramics
Evolution of structure in Na 0.5 Bi 0.5 TiO 3 single crystals with BaTiO 3
Evolution of structure in Na{sub 0.5}Bi{sub 0.5}TiO{sub 3} single crystals with BaTiO{sub 3}
Journal Article
·
Tue Apr 07 00:00:00 EDT 2015
· Journal of Applied Physics
·
OSTI ID:22399391
Evolution of structure in Na 0.5 Bi 0.5 TiO 3 single crystals with BaTiO 3
Journal Article
·
Mon Oct 20 00:00:00 EDT 2014
· Applied Physics Letters
·
OSTI ID:1392350
Evolution of structure in Na{sub 0.5}Bi{sub 0.5}TiO{sub 3} single crystals with BaTiO{sub 3}
Journal Article
·
Mon Oct 20 00:00:00 EDT 2014
· Applied Physics Letters
·
OSTI ID:22350973