In this study, Sr²⁺ modified porous PMN‐PZT ceramics with one‐dimensional pore channels were produced by the ionotropic gelation process of alginate/PMN‐PZT suspensions. The ion‐exchange method was employed during the fabrication procedure to adjust the content of SrO addition. With the SrO addition increasing from 1.653 wt.% to 2.957 wt.%, the structural phase of porous PMN‐PZT ceramics transformed from rhombohedral (R) to tetragonal (T) perovskite phase. Accordingly, the electromechanical coupling coefficient (k_t) value of porous PMN‐PZT ceramics decreased from 64.7% to 58.7%, while the hydrostatic figure of merit (HFOM) value increased from 1510 to 5547 × 10⁻¹⁵ m²/N, and acoustic impedance Z value ranged from 4.59 to 7.55 MRayls, which helped for applications in underwater transducers or hydrophones.

中文翻译：

---

Sr2 +取代的多孔PMN-PZT陶瓷的结构相变和电性能

在这项研究中，通过藻酸盐/ PMN-PZT悬浮液的离子凝胶化工艺生产了具有一维孔道的Sr ²⁺改性多孔PMN-PZT陶瓷。在制造过程中采用了离子交换法来调节SrO的添加量。随着SrO的添加从1.653 wt。％增加到2.957 wt。％，多孔PMN-PZT陶瓷的结构相从菱形（R）转变为四方（T）钙钛矿相。因此，多孔PMN-PZT陶瓷的机电耦合系数（k _t）值从64.7％降低到58.7％，而流体静力学品质因数（HFOM）值从1510增加到5547×10 ^-15  m ² / N，并且声阻抗Z 值范围从4.59到7.55 MRayls，这有助于在水下换能器或水听器中的应用。