Electrical properties of PZT under high-pressure stress pulse: Effects of loading frequency and circuit load. Issue 2 (15th January 2022)

• Record Type: Journal Article
• Authors: Wang, Ruizhi; Tang, Enling; Yang, Guolai; Han, Yafei; Chen, Chuang; Chang, Mengzhou; Guo, Kai; He, Liping
• Is Part Of: Ceramics international. Volume 48:Issue 2(2022)
• Page Start: 2421
• Page End: 2430
• Publication Date: 2022-01-15
• Subjects: High-pressure stress pulse -- PZT -- Load impedance -- Electrical output performance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.10.023
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The research on the discharge characteristics of PZT under conventional applications has made good progress. In theory, the piezoelectric equation can be used to describe the relationship between stress and electrical output. However, existing studies have shown that the relationship becomes nonlinear under high-pressure stress pulses. To study the effect of the loading frequency and the circuit load on the electrical output performance of PZT under high-pressure stress pulse, the experiments were carried out based on the split Hopkinson pressure bar and a dynamic & static universal test machine. The effects of different circuits on the output voltage under different frequency high-pressure stress pulses are analyzed. Both theory and experiments prove that the critical open-circuit measurement resistance ( R critial ) of PZT decreases with the stress frequency. The output voltage is positively correlated with the load resistance when that is less than R critial . It is confirmed by loading different circuits (diodes are added in different positions) that reverse positive charge appears at the negative pole of the material during the stress unloading stage. PZT has the maximum dischargeable strain ε E M under the high-pressure stress pulses, and it no longer generates induced charges when the strain is greater than ε E M . When constant strain rate loading makes PZT completely release energy, its open-circuit output voltage is proportional to the strain rate.