High power density in a piezoelectric energy harvesting ceramic by optimizing the sintering temperature of nanocrystalline powders

作者：Yue, Yunge; Hou, Yudong^*; Zheng, Mupeng; Yan, Xiaodong; Fu, Jing; Zhu, Mankang

来源：Journal of the European Ceramic Society, 2017, 37(15): 4625-4630.

DOI：10.1016/j.jeurceramsoc.2017.06.053

• Submicron crystalline
• Energy harvesting
• Mechanical quality factor
• Power density
• MnO2-doped PZN-PZT

Piezoelectric energy harvesting is the research hotspot in the field of new energy, and its core is to prepare piezoelectric ceramics with high transduction coefficient (d(33) x g(33)) and large mechanical quality factor (Q(m)) as well. In addition, the miniaturization of the piezoelectric energy harvester also requires the material to have a submicron fine grain structure. In this work, submicron-structured ternary system, MnO2-doped Pb(Zn1/3Nb2/3)O-3-Pb(Zr0.5Ti0.5)O-3 was constructed by pressureless sintering of nanocrystalline powders, which has been synthesized for the first time by high-energy ball milling route thereby evading the calcination stage. The microstructure and the energy harvesting characteristics were tailored through changing the sintering temperature. It was found that 1000 degrees C sintered fine-grained specimen (mean grain size similar to 0.95 mu m) showed the maximum d(33) x g(33) value of 9627 x 10(-15) m(2)/N, meanwhile Q(m) was as large as 774, which was almost seven times larger than pure counterpart. In the mode of the cantilever-type energy harvester, a high power density of 1.5 mu W/mm(3) were obtained for 1000 degrees C sintered specimen at a low resonance frequency of 90 Hz and acceleration of 10 m/s(2), which were further increased to 29.2 mu W/mm(3) when the acceleration increased to 50 m/s(2), showing the potential applications as a next generation high power multilayer energy harvester.

• 出版日期2017-12
• 单位北京工业大学