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Manganese-Doped BiFeO3-BaTiO3 High-Temperature Piezoelectric Ceramics: Phase Structures and Defect Mechanism.

Authors :
Yao, Zhonghua
Xu, Chaobing
Hao, Hua
Xu, Qi
Hu, Wei
Cao, Minghe
Liu, Hanxing
Source :
International Journal of Applied Ceramic Technology; May/Jun2016, Vol. 13 Issue 3, p549-553, 5p
Publication Year :
2016

Abstract

The bulk BiFeO<subscript>3</subscript>-BaTiO<subscript>3</subscript> system has been studied as a potential lead-free high-temperature piezoelectric material. It is found that the multivalency manganese-doped 0.8BiFeO<subscript>3</subscript>-0.2BaTiO<subscript>3</subscript> ceramics exhibit the coexistence of tetragonal and rhombohedral phases, whereas Mn doping improves the resistivity and exhibits hard characteristic. The optimal properties were obtained at 0.12 wt% Mn addition exhibiting T<subscript>c</subscript> ˜ 637°C. The increase of T<subscript>c</subscript> in Mn-modified compositions can be ascribed to the appearance of internal electric bias field by acceptor doping. The combination of good electrical properties and high T<subscript>c</subscript> makes these ceramics suitable for elevated temperature piezoelectric devices. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
1546542X
Volume :
13
Issue :
3
Database :
Complementary Index
Journal :
International Journal of Applied Ceramic Technology
Publication Type :
Academic Journal
Accession number :
114604088
Full Text :
https://doi.org/10.1111/ijac.12500