Abstract A novel 3–0-type composite, that contains ferroelectric (PZT-type) and corundum ceramics, is studied to show features of the piezoelectric response and anisotropy of electromechanical coupling factors. The corundum ceramic is applied as a component with a large elastic stiffness. Almost equal volume fractions of corundum mc and air pores mp are detected at 0.05 < mc < 0.18, and this has no analogies among the studied piezo-active 3–0-type composites. Experimental results on the piezoelectric coefficients , thickness electromechanical coupling factor , planar electromechanical coupling factor , and anisotropy (and ) are interpreted in terms of a model that takes into account features of the composite microgeometry and an interaction between the 3–0 ferroelectric ceramic/corundum and 3–0 ferroelectric ceramic/air regions. The studied 3–0-type composite can be of interest as an active element of piezoelectric transducers, sensors, and other piezotechnical devices.

中文翻译：

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新型含刚玉3-0型复合材料的压电灵敏度和机电耦合

摘要 研究了一种包含铁电体（PZT 型）和刚玉陶瓷的新型 3-0 型复合材料，以显示其压电响应和机电耦合因子的各向异性特征。刚玉陶瓷作为具有较大弹性刚度的部件而应用。在 0.05 < mc < 0.18 时检测到几乎相等的刚玉 mc 和气孔 mp 的体积分数，这与所研究的压电活性 3-0 型复合材料没有相似之处。压电系数、厚度机电耦合因子、平面机电耦合因子和各向异性 (和 ) 的实验结果被解释为一个模型，该模型考虑了复合微观几何形状的特征以及 3-0 铁电陶瓷/刚玉之间的相互作用和 3-0 铁电陶瓷/空气区域。