期刊
ADVANCED FUNCTIONAL MATERIALS
卷 28, 期 30, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201706895
关键词
energy harvesting; full set of material constants; piezoelectric coefficient e(33); PNN-PZT ceramics; relaxor ferroelectrics
类别
资金
- National Natural Science Foundation of China [51772005, 51132001]
It is well known that the piezoelectric performance of ferroelectric Pb(Zr,Ti)O-3 (PZT) based ceramics is far inferior to that of ferroelectric single crystals due to ceramics' polycrystalline nature. Herein, it is reported that piezoelectric stress coefficient e(33)= 39.24 C m(-2) (induced electric displacement under applied strain) in the relaxor piezoelectric ceramic 0.55Pb(Ni1/3Nb2/3)O-3-0.135PbZrO(3)-0.315PbTiO(3) (PNN-PZT) prepared by the solid state reaction method exhibits the highest value among various reported ferroelectric ceramic and single crystal materials. In addition, its piezoelectric coefficient d(33)*= 1753 pm V-1 is also comparable with that of the commercial Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) piezoelectric single crystal. The PNN-PZT ceramic is then assembled into a cymbal energy harvester. Notably, its maximum output current at the acceleration of 3.5 g is 2.5 mA(pp), which is four times of the PMN-PT single crystal due to the large piezoelectric e(33) constants; while the maximum output power is 14.0 mW, which is almost the same as the PMN-PT single crystal harvester. The theoretical analysis on force-induced power output is also presented, which indicates PNN-PZT ceramic has great potential for energy device application.
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