IEEE Trans Ultrason Ferroelectr Freq Control. 2017 Oct;64(10):1599-1607. doi: 10.1109/TUFFC.2017.2720420. Epub 2017 Jun 27.
This paper provides a detailed study of the structure-piezoelectric property relationships and the hydrostatic response of 2-2-Type composites based on relaxor-ferroelectric 0.72 Pb (MgNb)O-0.28PbTiO single crystal (SC) material. Type I layers in the composite system are represented by a single-domain [111]-poled SC. Changes in the orientation of the crystallographic axes in the Type I layer are undertaken to determine the maximum values of the hydrostatic piezoelectric coefficients d , g , and e , and squared figure of merit d g of the composite. The Type II layers are a 0-3 composite whereby inclusions of modified PbTiO ceramic are distributed in a polymer matrix. A new effect is described for the first time due to the impact of anisotropic elastic properties of the Type II layers on the hydrostatic piezoelectric response that is coupled with the polarization orientation effect in the Type I layers. Large hydrostatic parameters g ≈ 300 -400 mV · m/N, e ≈ 40 -45 C/ [Formula: see text], and d g ∼ 10 Pa are achieved in the composite based on the 0.72 Pb(MgNb)O-0.28PbTiO SC. Examples of the large piezoelectric anisotropy ( |d /d | ≥ 5 or | g /g | ≥ 5 ) are discussed. The hydrostatic parameters of this novel compositesystem are compared to those of conventional 2-2 piezocomposites.
本文详细研究了基于弛豫铁电 0.72Pb(MgNb)O-0.28PbTiO 单晶材料的 2-2 型复合材料的结构-压电性能关系和静压响应。复合体系中的 I 型层由单畴[111]极化 SC 表示。通过改变 I 型层中晶轴的方向来确定复合材料的静水压电系数 d、g 和 e 的最大值，以及复合体系的平方品质因数 d g。II 型层是一种 0-3 复合材料，其中改性 PbTiO 陶瓷的夹杂物分布在聚合物基质中。首次描述了一种新效应，由于 II 型层各向异性弹性性能对静压响应的影响与 I 型层中极化方向的影响相耦合。在基于 0.72Pb(MgNb)O-0.28PbTiO SC 的复合材料中实现了大的静压参数 g ≈ 300-400 mV·m/N、e ≈ 40-45 C/[公式：见正文]和 d g ∼ 10 Pa。讨论了大压电各向异性的例子（|d/d|≥5 或|g/g|≥5）。将该新型复合材料系统的静压参数与传统的 2-2 压电器件进行了比较。
