PZT ceramics;
piezoelectric coefficients;
hydrostatic piezoelectric coefficients;
bias electric field;
D O I:
10.1080/00150190802365681
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
The paper deals with the non-linear properties of the piezoelectric ceramics Pb(ZrxTi1 - x)O3 (PZT) at room temperature. The influence of DC electric field on the material parameters, such as piezoelectric coefficients d31 and d33 of PZT ceramics, was studied using the resonance method. The dependence of the resonance and antiresonance frequencies of PZT resonators on DC electric field was measured. Hydrostatic piezoelectric coefficients dh, calculated from d33 and d31 piezoelectric coefficients, were compared with dh coefficients, that were measured directly by dynamic hydrostatic method. Electric field limits for application on PZT ceramics were determined. A remarkable influence of the DC electric field on d31 and d33 piezoelectric coefficients values was exhibited for soft PZT ceramics (APC 850 and APC 856).