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A-site occupancy in the lead-free (Bi[sub 1/2]Na[sub 1/2]TiO[sub 3])[sub 0.94]–(BaTiO[sub 3])[sub 0.06] piezoceramic: Combining first-principles study and TEM

Kling, Jens and Hayn, Silke and Schmitt, Ljubomira A. and Gröting, Melanie and Kleebe, Hans-Joachim and Albe, Karsten (2010):
A-site occupancy in the lead-free (Bi[sub 1/2]Na[sub 1/2]TiO[sub 3])[sub 0.94]–(BaTiO[sub 3])[sub 0.06] piezoceramic: Combining first-principles study and TEM.
In: Journal of Applied Physics, American Institute of Physics, p. 114113, 107, (11), ISSN 0021-8979, [Online-Edition: http://dx.doi.org/10.1063/1.3437631],
[Article]

Abstract

The crystal structure of the lead-free piezoelectric ceramic (Bi1/2Na1/2TiO3)0.94–(BaTiO3)0.06 was investigated by first-principles calculations and high-resolution transmission electron microscopy (HRTEM) imaging. Structures with different A-site occupation were relaxed by total energy calculations within density functional theory and then used for simulating the corresponding HRTEM images. Simulated and experimental HRTEM images were compared and the closest match selected for structure interpretation. By combining these techniques, we have identified the Bi(Ba)/Na distribution on the A-site to be homogeneous. We exclude the possibility that regions visible in HRTEM images within one grain can be attributed to different ordering but to a slight tilting of the structure with respect to the electron beam.

Item Type: Article
Erschienen: 2010
Creators: Kling, Jens and Hayn, Silke and Schmitt, Ljubomira A. and Gröting, Melanie and Kleebe, Hans-Joachim and Albe, Karsten
Title: A-site occupancy in the lead-free (Bi[sub 1/2]Na[sub 1/2]TiO[sub 3])[sub 0.94]–(BaTiO[sub 3])[sub 0.06] piezoceramic: Combining first-principles study and TEM
Language: English
Abstract:

The crystal structure of the lead-free piezoelectric ceramic (Bi1/2Na1/2TiO3)0.94–(BaTiO3)0.06 was investigated by first-principles calculations and high-resolution transmission electron microscopy (HRTEM) imaging. Structures with different A-site occupation were relaxed by total energy calculations within density functional theory and then used for simulating the corresponding HRTEM images. Simulated and experimental HRTEM images were compared and the closest match selected for structure interpretation. By combining these techniques, we have identified the Bi(Ba)/Na distribution on the A-site to be homogeneous. We exclude the possibility that regions visible in HRTEM images within one grain can be attributed to different ordering but to a slight tilting of the structure with respect to the electron beam.

Journal or Publication Title: Journal of Applied Physics
Volume: 107
Number: 11
Publisher: American Institute of Physics
Uncontrolled Keywords: ab initio calculations, barium compounds, bismuth compounds, crystal structure, density functional theory, electron beams, piezoceramics, sodium compounds, titanium compounds, transmission electron microscopy
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials Modelling
DFG-Collaborative Research Centres (incl. Transregio)
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B3: Structure Characterization of Piezoelectric Ceramics With Respect to Electrical Fatigue
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > C - Modelling
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > C - Modelling > Subproject C1: Quantum mechanical computer simulations for electron and defect structure of oxides
Date Deposited: 10 Aug 2011 11:25
Official URL: http://dx.doi.org/10.1063/1.3437631
Additional Information:

SFB 595 Cooperation B3, C1

Identification Number: doi:10.1063/1.3437631
Funders: This work was funded by the Deutsche Forschungsgemeinschaft �DFG� under SFB 595 “Electrical Fatigue in Functional Materials.”
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