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Effects of Excess Barium on the Structure and Electrical Properties of (Ba,Ca)TiO3 Piezoelectric Ceramics with High Mechanical Quality Factors.
- Source :
- Journal of Wuhan University of Technology; Oct2018, Vol. 33 Issue 5, p1039-1045, 7p
- Publication Year :
- 2018
-
Abstract
- Manganese-doped Ba<subscript>0.925</subscript>Ca<subscript>0.075</subscript>TiO<subscript>3</subscript> lead-free piezoelectric ceramics (abbreviated as BCT) with high mechanical quality factor were synthesized by conventional solid-state reaction method. The effects of excess Ba on the crystal structure, microstructure, and electrical properties of the ceramics were systematically investigated. X-ray diffraction and Raman spectra revealed that Ca<superscript>2+</superscript> ions were pushed from Ba sites to Ti sites of BCT when 1.5 mol% extra Ba<superscript>2+</superscript> ions were added after sintering. The grain size of the ceramics was decreased by adding extra Ba<superscript>2+</superscript> ions. The mechanical quality factor and resistivity of the ceramics decreased dramatically when the excess Ba was more than 1.5 mol%. High piezoelectric coefficients ( d<subscript>33</subscript> = 150-190 pC/N ) and high mechanical quality factors ( Q<subscript>m</subscript> = 1 000-1 200 ) were obtained in the ceramics when the excess of Ba was between 0.5 mol% and 1 mol%. These results indicated that the properties of BCT ceramics could be tailored by adjusting the content of Ba. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10002413
- Volume :
- 33
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Journal of Wuhan University of Technology
- Publication Type :
- Academic Journal
- Accession number :
- 132160575
- Full Text :
- https://doi.org/10.1007/s11595-018-1931-8