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

被引：73

作者：

Aksel, Elena ^{[2
]}

Jakes, Peter ^{[1
]}

Erdem, Emre ^{[1
]}

Smyth, Donald M. ^{[3
]}

Ozarowski, Andrew ^{[4
]}

van Tol, Johan ^{[4
]}

Jones, Jacob L. ^{[2
]}

Eichel, Ruediger-A. ^{[1
]}

机构：

[1] Univ Freiburg, Inst Phys Chem, D-79104 Freiburg, Germany

[2] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[3] Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA

[4] Florida State Univ, Natl High Magnet Field Lab, Ctr Interdisciplinary Magnet Resonance, Tallahassee, FL 32310 USA

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2011年 / 94卷 / 05期

关键词：

ELECTRON-PARAMAGNETIC-RESONANCE; LEAD-FREE; PHASE-TRANSITIONS; PIEZOELECTRIC CERAMICS; DEFECT STRUCTURE; PBTIO3; CERAMICS; SPIN-RESONANCE; VALENCE STATE; MN; BATIO3;

D O I：

10.1111/j.1551-2916.2010.04249.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 degrees C the manganese functional centers are oxidized to Mn3+. Subsequent to the sintering at 1100 degrees C, part of the trivalent manganese centers are reduced back to the initial Mn2+-oxidation state.

引用

页码：1363 / 1367

页数：5

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