Investigations of Secondary Contribution to Electrocaloric Effect in Relaxor PMN-PT Ceramic
Investigations of Secondary Contribution to Electrocaloric Effect in Relaxor PMN-PT Ceramic
复制标题
DOI：
10.1080/00150193.2015.1011560
复制
发表时间：
2015-04
期刊：
影响因子：
0.8
通讯作者：
T. Correia;M. Rokosz
中科院分区：
文献类型：
--
作者：
T. Correia;M. Rokosz
在这项工作中，主要和次要的电热效应的贡献进行了研究，在弛豫PMN-PT陶瓷，结合极化和应变滞后测量。我们的研究结果表明，虽然陶瓷显示出较大的机电响应，但在30-200°C温度范围内，场致尺寸变化（二次效应）占陶瓷电热响应的不到19%。我们相信，本文提出的用于表征电热材料的方法可以通过定制主要和次要贡献来为新型和优化的材料和异质结构的开发提供有价值的见解。
In this work, primary and secondary contributions to electrocaloric effect were investigated in a relaxor PMN-PT ceramic, by combining polarization and strain hysteretic measurements. Our results indicate that, although the ceramic shows a large electromechanical response, field-induced dimensional change (secondary effect) accounts for less than 19 % of the ceramic electrocaloric response over the 30-200°C temperature range. We believe that the method for the characterization of electrocaloric materials presented herein can provide valuable insights into the development of novel and optimized materials and heterostructures by tailoring primary and secondary contributions.