• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Variation of Piezoelectric properties and mechanisms across the relaxor-like/Ferroelectric continuum in BiFeO3??? (K0.5Bi0.5)TiO3???PbTiO3 ceramics
【24h】

Variation of Piezoelectric properties and mechanisms across the relaxor-like/Ferroelectric continuum in BiFeO3??? (K0.5Bi0.5)TiO3???PbTiO3 ceramics

机译：BiFeO 3 中弛豫样/铁电连续体的压电特性及其机制的变化（K0.5Bi0.5）TiO3 ??? PbTiO3陶瓷

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

摘要

1??? x ??? y)BiFeO???x(KBi0.5)TiO???yPbTiO (BFKBT- PT) piezoelectric ceramics were investigated across the compositional space and contrasted against the xBiFeO??? (1???x)(KBi)TiO (BF-KBT) system, whereby a range of relaxor-like/ferroelectric behavior was observed. Structural and piezoelectric properties were closely related to the PbTiO concentration; below a critical concentration, relaxor-like behavior was identified. The mechanisms governing the piezoelectric behavior were investigated with structural, electrical, and imaging techniques. X-ray diffraction established that longrange non-centrosymmetric crystallographic order was evident above a critical PbTiO concentration, y > 0.1125. Commensurate with the structural analysis, electric-field-induced strain responses showed electrostrictive behavior in the PbTiO-reduced compositions, with increased piezoelectric switching in PbTiO-rich compositions. Positive-up???negative-down (PUND) analysis was used to confirm electric-field-induced polarization measurements, elucidating that the addition of PbTiO increased the switchable polarization and ferroelectric ordering. Piezoresponse force microscopy (PFM) of the BF-KBT-PT system exhibited typical domain patterns above a critical PbTiO threshold, with no ferroelectric domains observed in the BF-KBT system in the pseudocubic region. Doping of BiFeO???PbTiO has been unsuccessful in the search for hightemperature materials that offer satisfactory piezoelectric properties; however, this system demonstrates that the partial substitution of alternative end-members can be an effective method. The partial substitution of PbTiO into BF-KBT enables long-range non-centrosymmetric crystallographic order, resulting in increased polar order and TC, compared with the pseudocub- c region. The search for novel high-temperature piezoelectric ceramics can therefore exploit the accommodating nature of the perovskite family, which allows significant variance in chemical and physical characters in the exploration of new solid-solutions.
机译：1 ？？？ X ？？？ y）BiFeO 3 x（KBi0.5）TiO 2 yPbTiO（BFKBT-PT）压电陶瓷在整个组成空间上进行了研究，并与xBiFeO 2进行了对比。 （1×x）（KBi）TiO（BF-KBT）体系，由此观察到一定范围的弛豫样/铁电行为。结构和压电性能与PbTiO浓度密切相关。低于临界浓度，可识别出类似松弛子的行为。利用结构，电学和成像技术研究了控制压电行为的机制。 X射线衍射确定，在临界PbTiO浓度（y> 0.1125）以上，远距离非中心对称晶体学顺序明显。与结构分析相称，电场诱导的应变响应在PbTiO还原的组合物中表现出电致伸缩行为，而在PbTiO富组合物中的压电开关增加。使用正-负-负（PUND）分析来确认电场引起的极化测量，这说明添加PbTiO会增加可切换的极化和铁电有序性。 BF-KBT-PT系统的压电响应显微镜（PFM）在临界PbTiO阈值以上显示出典型的畴图，在伪立方区域的BF-KBT系统中未观察到铁电畴。在寻找能提供令人满意的压电性能的高温材料方面，BiFeO-PbTiO的掺杂一直没有成功。但是，该系统表明，替代性末端成员的部分替代可能是一种有效的方法。将PbTiO部分替换为BF-KBT可以实现远距离非中心对称的晶体学顺序，与伪立方区域相比，导致极性顺序和TC增大。因此，寻找新型高温压电陶瓷可以利用钙钛矿家族的可容纳性，这在探索新的固溶体时允许化学和物理特性发生显着变化。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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