Dynamic Behavior of PZT-5 Piezoelectric Ceramics under Impact Loading
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摘要: 压电陶瓷是压电冲击传感器的核心元件。采用分离式霍普金森压杆（SHPB）实验技术研究PZT-5压电陶瓷在冲击载荷作用下的力电特性，进行了4～14 m/s不同速度的实验。实验中为保证试件与压杆绝缘，采用了对试件影响较小的表面溅射Al2N3的工艺，溅射厚度为1～3
${{\text{μ}}{\rm{m}}}$ 。实验结果表明：在冲击加载过程中，PZT-5压电陶瓷的应变变化表现出黏性性质，其产生的电荷与加载过程中试件的应力、应变均相关；当加载速度超过一定值时，加载过程中压电陶瓷可能产生损伤，不同的损伤程度也影响电荷的产生；PZT-5压电陶瓷的力学和电学性能具有明显的率相关性。Abstract: Piezoelectric ceramics are the core components of piezoelectric impact sensors. The mechanical and electrical behaviors of PZT-5 piezoelectric ceramics were studied by split Hopkinson pressure bar (SHPB) experimental technique. The tests were carried out at speeds of 4–14 m/s. In order to ensure the insulation between specimen and pressure bar, a process of sputtering Al2N3 on the surface that with less influence on the test piece was used, and the sputtering thickness was 1–3${{\text{μ}}{\rm{m}}}$ . The experimental results of SHPB were analyzed and discussed. The results show that the strain change of PZT-5 piezoelectric ceramics exhibits viscous properties during impact loading, and the charge generated is related to the stress and strain of the specimen during loading. When the loading speed exceeds a certain level, the piezoelectric ceramic may be damaged during the loading process, and the degree of damage also affects the generation of charge. The mechanical and electrical properties of PZT-5 piezoelectric ceramics have obvious rate correlation. -
图 2 典型的SHPB实验测试数据（加载速度：4.5 m/s）
Figure 2. Typical SHPB experimental test data (Loading speed: 4.5 m/s)
图 3 典型的应力、应变和电荷的时程曲线（加载速度：4.5 m/s）
Figure 3. Typical stress-time, strain-time and charge-time curves (Loading speed: 4.5 m/s)
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