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