Thermal and vibrational energy harvesting using PZT- and BT-based ceramics
Thermal and vibrational energy harvesting using PZT- and BT-based ceramics
复制标题
使用 PZT 和 BT 陶瓷收集热能和振动能
DOI：
10.1109/isaf.2012.6297808
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
and W. Sakamoto
中科院分区：
文献类型：
--
作者：
H. Maiwa;Y. Ishizone;and W. Sakamoto
研究了不同Tc PZT基陶瓷、PVDF薄膜和PMN-PT晶体的热释电效应。在5 K/s的温度变化下，Tc为145°C的PZT陶瓷的输出功率和功率密度分别为5.2 μW和1.66 μW/cm 2。PMN-PT在7 K/s温度变化下的平均功率密度分别为3.4 μW/cm 2和1.16 μW/cm 2。具有300°C Tc的PZT基陶瓷在30°C至145°C的温度变化和0至30 kV/cm的场变化下表现出40 J/L/循环的大能量产生。还研究了利用压电单晶片的振动-电能转换器。由具有较高居里温度的PZT组成的单压电晶片产生更大的功率和能量。锰掺杂也被发现是有效的产生能量和功率的钛酸钡陶瓷。由18×10×0.5 mm PZT基陶瓷（g_（31）= 11.8 mVm/N，Q_m = 461）和Mn-0.2mol%掺杂的BaTiO_3陶瓷（g_（31）= 2.2 mVm/N，Q_m = 95.3）组成的单压电晶片，在相对位移0.8 mm，频率80 Hz，振荡45 s时，分别产生1763 μJ和432 μJ的能量。
Thermal energy harvesting using pyroelectric effects in PZT-based ceramics with different Tc, PVDF films, and PMN-PT crystals were investigated. The output power and power density of PZT ceramics with Tc of 145°C were 5.2 μW and 1.66 μW/cm2under 5 K/s temperature change, respectively. Those of PMN-PT were 3.4 μW and 1.16 μW/cm2under 7 K/s temperature change, respectively. PZT-based ceramics with Tc of 300°C exhibited large energy generation of 40 J/L/cycle with temperature variations from 30°C to 145°C and field variations from 0 to 30kV/cm. Vibration-electrical energy converters using piezoelectric unimorphs were also investigated. The unimorph consisting of a PZT with higher Curie temperature produced larger power and energy. Mn-doping was also found to be effective for producing energy and power in barium titanate ceramics. A unimorph consisting of 18×10×0.5 mm PZT-based ceramics with a g31of 11.8 mVm/N and Qmof 461 and lead-free Mn-0.2mol% doped BaTiO3ceramics with g31of 2.2 mVm/N and Qmof 95.3 produced 1763 μJ and 432 μJ by 45 second oscillation with 0.8 mm relative displacement and a frequency of 80 Hz.