Energy harvesting using multilayer structure based on La-doped PMN-PT electrostrictive ceramics
Energy harvesting using multilayer structure based on La-doped PMN-PT electrostrictive ceramics
复制标题
基于La掺杂PMN-PT电致伸缩陶瓷的多层结构能量收集
DOI：
10.1002/pssa.201228117
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发表时间：
2012-10
影响因子：
2
通讯作者：
Wen, Baosong
中科院分区：
文献类型：
--
作者：
Huang, Hualin;Li, Guorong;Huang, Lizhu;Ruan, Wei;Cheng, Lihong;Zeng, Jiangtao;Wen, Baosong
电致伸缩材料在直流电场下表现出高的感应应变，这种效应在发电机应用中很重要。本文研究了La掺杂PMN-PT电致伸缩陶瓷的能量收集性能。提出了一种具有高介电常数和高电致伸缩系数的多层结构电致伸缩能量采集器。在应变Sm= 7 × 10 ~（-5）（m/m）时，在1.5V/mm的直流电场下，通过450 V的小匹配电阻获得了630迈斯的峰值电流。实验结果与改进模型的理论行为进行了比较。这两组数据吻合得很好。对能量转换效率的研究表明，
消耗的功率和收获的功率之间的关系由设备呈现。结果表明，电致伸缩器件在能量收集应用于小功率电子器件的潜在前景。
Electrostrictive materials exhibit high induced strain under dc electric fields and this effect is important in generator application. This paper studied the energy-harvesting performances of La-doped PMN-PT electrostrictive ceramics that have rarely been reported. A multilayer structured electrostrictive energy harvester with high dielectric constant and electrostrictive coefficient is proposed. With a strain Sm=7x10(-5)(m/m), a peak current value of 630 mAis obtained across a small matched resistance of 450V under a dc electrical field of 1.5 V/mm. The working principle of the device is reviewed andimproved to predict the current and power generated by the harvester. Experimental results are compared to the theoretic behaviors of the improved model. A good agreement is observed by the two sets of data. The study on the efficiency of the energy conversion showed that a positive balance
between the consumed power and the harvested power was presented by the device. The result demonstrates the potential perspective of the electrostrictive device in energy harvesting applied to low-power electronics.