Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7887457 | Ceramics International | 2018 | 19 Pages |
Abstract
Co modified lead-free 0.7BiFeO3ââ¯0.3BaTiO3 (0.7BFO-0.3BT-xCo2O3ï¼xâ¯=â¯0, 0.3, 0.6, 0.9 and 1.2) piezoelectric ceramics were prepared by a conventional solid-state reaction. The effect of Co doping on the structural, piezoelectric properties and leakage current was investigated. A greatly reduced leakage current and dramatically improved piezoelectric properties were achieved in xâ¯=â¯0.3 Co doped ceramic. The maximum d33 =â¯151 pC/N and kp =â¯0.32 were obtained at xâ¯=â¯0.3 addition due to the co-effect of maximum applied poling electric field and large grain size. The X-ray photoelectron spectroscopy (XPS) analysis and complex impedance data indicated that the greatly reduced leakage current could be attributed to the effect of suppressing Fe2+ ion formation and promoting grain boundary resistance by Co doping. These results strongly suggest that low concentration of Co doping is a good strategy to improve the resistance and piezoelectric properties simultaneously in BFO-based lead-free piezoceramics.
Related Topics
Physical Sciences and Engineering
Materials Science
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Authors
Shigang Huang, Qingning Li, Ling Yang, Jiwen Xu, Changrong Zhou, Guohua Chen, Changlai Yuan, Guanghui Rao,