• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of mechanics and materials in design >Design of spatially varying electrical poling for enhanced piezoelectricity in Pb(Mg_(1/3)Nb_(2/3))O_3-0.35PbTiO_3
【24h】

Design of spatially varying electrical poling for enhanced piezoelectricity in Pb(Mg_(1/3)Nb_(2/3))O_3-0.35PbTiO_3

机译：Pb中增强压电性的空间变化的电压设计（Mg_（1/3）Nb_（2/3））O_3-0.35PBTIO_3

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Improvement in operating characteristics of piezoelectric materials, one of the most extensively used dielectric materials, is a major focus of research among materials scientists. Present work puts forward, a novel approach for achieving enhanced piezoelectricity in ferroelectric materials by manipulating electrode placement during poling. Three unique poling configurations, abbreviated as PC1, PC2, and PC3 are developed for exploiting the dependence of effective piezoelectric properties on spatially varying poling direction. Finite element method based numerical simulations are performed to evaluate the electric field distribution, poling direction, and their effect on effective piezoelectric coupling coefficients of PMN-0.35PT (Pb(Mg1/3Nb2/3)O-3-0.35PbTiO(3)) piezoelectric ceramic. A two-phase solution process is developed to evaluate the local orientation of dipoles for each poling configuration and subsequently computing effective piezoelectric properties of the material in an average sense. Parametric studies are carried out to analyze the effect of aspect ratioRof sample and electrode to sample length ratio,ron effective piezoelectric properties. PC1 yields an increase of up to 135% in the magnitude of the transverse coupling coefficient (e(31)(eff)) and an 8% increase in effective longitudinal coupling coefficient (e(33)(ff))while PC2 is observed to exhibit a maximum enhancement of 164% in the magnitude of e(33)(ff) and 11.2% in the magnitude of e(33)(ff). PC3, presented as a special case, yields zero values of piezoelectric coefficients in an average sense but can result in a highly elevated net output for bending applications, owing to favorable spatial variation in stresses and associated piezoelectric coefficients.
机译：压电材料的操作特性的改进是最广泛使用的介电材料之一，是材料科学家研究的主要重点。目前的工作提出了一种通过操纵电极放置在铁电材料中实现增强的压电性的新方法。开发了三种独特的极化配置，缩写为PC1，PC2和PC3，用于利用有效压电性质对空间变化的极化方向的依赖性。基于有限元方法的数值模拟来评估电场分布，极化方向及其对PMN-0.35pt的有效压电耦合系数的影响（PB（MG1 / 3NB2 / 3）O-3-0.35PBTIO（3））压电陶瓷。开发了一种两相解决方法，以评估每个极化配置的偶极子的局部取向，随后以平均意义计算材料的有效压电性能。进行参数研究以分析样品和电极对样品长度比，RON有效压电性能的效果。 PC1在横向耦合系数（E（31）（EFF））的幅度中产生高达135％的增加，并且在PC2观察到有效纵向耦合系数（E（33）（FF））的8％增加在e（33）（FF）的大小和11.2％的e（33）（ff）的大小，最大增强164％。 PC3作为特殊情况呈现，在平均意义上产生压电系数的零值，但是由于应力和相关的压电系数的有利空间变化，可以导致用于弯曲应用的高度升高的净输出。

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号