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High-Frequency EPR Analysis of MnO2-Doped [Bi0.5Na0.5]TiO3-BaTiO3Piezoelectric Ceramics – Manganese Oxidation States and Materials ‘Hardening’

Erdem, Emre and Schaab, Silke and Jo, Wook and Ozarowski, Andrew and van Tol, Johan and Eichel, Rüdiger-A. (2012):
High-Frequency EPR Analysis of MnO2-Doped [Bi0.5Na0.5]TiO3-BaTiO3Piezoelectric Ceramics – Manganese Oxidation States and Materials ‘Hardening’.
In: Ferroelectrics, pp. 116-121, 428, (1), ISSN 0015-0193,
[Online-Edition: http://dx.doi.org/10.1080/00150193.2012.675831],
[Article]

Abstract

High-frequency electron paramagnetic resonance (EPR) has been used to identify different manganese oxidation states in the 0.5 mol% MnO 2 -doped (100−x)Bi 0.5 Na 0.5 TiO 3 -xBaTiO 3 (BNT-xBT) solid solution with x=6. The as-sintered and air-annealed samples show two distinct EPR resonances that were assigned to Mn 2+ - and Mn 3+ -ions, respectively, incorporated at the Ti-site. The equilibrium between acceptor-type Mn″ Ti - and Mn′ Ti -states can be explained by the thermodynamic equilibration under air at the sintering temperature corresponding to [n]>[p], which yields an n-type Mn:BNT-6BT compound.

Item Type: Article
Erschienen: 2012
Creators: Erdem, Emre and Schaab, Silke and Jo, Wook and Ozarowski, Andrew and van Tol, Johan and Eichel, Rüdiger-A.
Title: High-Frequency EPR Analysis of MnO2-Doped [Bi0.5Na0.5]TiO3-BaTiO3Piezoelectric Ceramics – Manganese Oxidation States and Materials ‘Hardening’
Language: English
Abstract:

High-frequency electron paramagnetic resonance (EPR) has been used to identify different manganese oxidation states in the 0.5 mol% MnO 2 -doped (100−x)Bi 0.5 Na 0.5 TiO 3 -xBaTiO 3 (BNT-xBT) solid solution with x=6. The as-sintered and air-annealed samples show two distinct EPR resonances that were assigned to Mn 2+ - and Mn 3+ -ions, respectively, incorporated at the Ti-site. The equilibrium between acceptor-type Mn″ Ti - and Mn′ Ti -states can be explained by the thermodynamic equilibration under air at the sintering temperature corresponding to [n]>[p], which yields an n-type Mn:BNT-6BT compound.

Journal or Publication Title: Ferroelectrics
Volume: 428
Number: 1
Uncontrolled Keywords: Piezoelectrics, bismuth titanate, defect structure, manganese doping, high-frequency EPR
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis > Subproject A1: Manufacturing of ceramic, textured actuators with high strain
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > B - Characterisation > Subproject B1: EPR-Investigations of defects in ferroelectric ceramic material
11 Department of Materials and Earth Sciences > Material Science
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > A - Synthesis
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
11 Department of Materials and Earth Sciences
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 14 Jun 2012 10:31
Official URL: http://dx.doi.org/10.1080/00150193.2012.675831
Additional Information:

SFB 595 Cooperation A1, B1

Identification Number: doi:10.1080/00150193.2012.675831
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