Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1461345 | Ceramics International | 2014 | 5 Pages |
Abstract
(Bi0.5Na0.5)0.94Ba0.06TiO3–xHfO2 [BNBT–xHfO2] lead-free ceramics were prepared using the conventional solid-state reaction method. Effects of HfO2 content on their microstructures and electrical properties were systematically studied. A pure perovskite phase was observed in all the ceramics with x=0–0.07 wt%. Adding optimum HfO2 content can induce dense microstructures and improve their piezoelectric properties, and a high depolarization temperature was also obtained. The ceramics with x=0.03 wt% possess optimum electrical properties (i.e., d33~168 pC/N, kp~32.1%, Qm~130, εr~715, tan δ~0.026, and Td~106 °C, showing that HfO2-modified BNBT ceramics are promising materials for piezoelectric applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Tao Chen, Hongli Wang, Ting Zhang, Guangchang Wang, Jifang Zhou, Jianwei Zhang, Yuhong Liu,