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Processing of Manganese-Doped [Bi0.5Na0.5]TiO3 Ferroelectrics: Reduction and Oxidation Reactions During Calcination and Sintering

Aksel, Elena ; Jakes, Peter ; Erdem, Emre ; Smyth, Donald M. ; Ozarowski, Andrew ; van Tol, Johan ; Jones, Jacob L. ; Eichel, Rüdiger-A. (2011):
Processing of Manganese-Doped [Bi0.5Na0.5]TiO3 Ferroelectrics: Reduction and Oxidation Reactions During Calcination and Sintering.
In: Journal of the American Ceramic Society, 94 (5), pp. 1363-1367. ISSN 00027820,
[Article]

Abstract

The effect of multivalent manganese doping on the defect structure is studied for the “lead-free” piezoelectric [Bi0.5Na0.5]TiO3 (BNT) by means of high-frequency electron paramagnetic resonance (EPR) spectroscopy. The results show that manganese is incorporated with di- and trivalent oxidation states on a titanium site, acting as an acceptor (Mn′Ti, Mn′′Ti). In particular, it is demonstrated that during calcination at 800°C the manganese functional centers are oxidized to Mn3+. Subsequent to the sintering at 1100°C, part of the trivalent manganese centers are reduced back to the initial Mn2+-oxidation state.

Item Type: Article
Erschienen: 2011
Creators: Aksel, Elena ; Jakes, Peter ; Erdem, Emre ; Smyth, Donald M. ; Ozarowski, Andrew ; van Tol, Johan ; Jones, Jacob L. ; Eichel, Rüdiger-A.
Title: Processing of Manganese-Doped [Bi0.5Na0.5]TiO3 Ferroelectrics: Reduction and Oxidation Reactions During Calcination and Sintering
Language: English
Abstract:

The effect of multivalent manganese doping on the defect structure is studied for the “lead-free” piezoelectric [Bi0.5Na0.5]TiO3 (BNT) by means of high-frequency electron paramagnetic resonance (EPR) spectroscopy. The results show that manganese is incorporated with di- and trivalent oxidation states on a titanium site, acting as an acceptor (Mn′Ti, Mn′′Ti). In particular, it is demonstrated that during calcination at 800°C the manganese functional centers are oxidized to Mn3+. Subsequent to the sintering at 1100°C, part of the trivalent manganese centers are reduced back to the initial Mn2+-oxidation state.

Journal or Publication Title: Journal of the American Ceramic Society
Journal volume: 94
Number: 5
Divisions: 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
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
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 08 Aug 2011 08:58
Official URL: http://dx.doi.org/10.1111/j.1551-2916.2010.04249.x
Additional Information:

SFB 595 B1

Identification Number: doi:10.1111/j.1551-2916.2010.04249.x
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