畴尺寸对Pb(Mg1/3Nb2/3)O3-PbTiO3铁电晶体中尺度效应的影响
Influence of Domain Size on the Scaling Effects in Pb(Mg1/3Nb2/3)O3-PbTiO3 Ferroelectric Crystals.
作者信息
Lin Dabin, Lee Hyeong Jae, Zhang Shujun, Li Fei, Li Zhenrong, Xu Zhuo, Shrout Thomas R
机构信息
Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
出版信息
Scr Mater. 2011 Jun 1;64(12):1149-1151. doi: 10.1016/j.scriptamat.2011.03.018.
The property degradation observed in thin Pb(Mg(1/3)Nb(2/3))O(3)-PbTiO(3) (PMN-PT) crystals is believed to relate to large domains and subsequent clamping induced by surface-boundary. In this work, the properties were investigated as function of domain size, using controlled poling. The degraded piezoelectric and dielectric properties of thin PMN-PT were found to increase significantly, by decreasing domain size. Furthermore, the fine domain structure was found to be stable at 3kV/cm after 7.0×10(5) negative-pulse cycles, hence, enabling PMN-PT crystals for high-frequency (>20 MHz) ultrasound-transducers.
在薄的铌镁酸铅-钛酸铅（PMN-PT）晶体中观察到的性能退化被认为与大尺寸畴以及随后由表面边界引起的钳制有关。在这项工作中，通过控制极化，研究了这些性能与畴尺寸的关系。发现通过减小畴尺寸，薄PMN-PT退化的压电和介电性能显著提高。此外，发现精细畴结构在7.0×10⁵个负脉冲循环后在3kV/cm下是稳定的，因此，使PMN-PT晶体可用于高频（>20MHz）超声换能器。
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