Admittance and Transient Properties of Piezoelectric Ceramic Composite
Yu Xiaodong (Shanghai Institute of Ceramics,Academia Sinica,200050)
The dielectric and piezoelectric properties of two phase composites are studied in thispaper.By means of admittance circle and pulse transient response methods,the measuredrelationship between admittance and frequency for type 3-3 porous PZT,sandwich PZT,type1-3 soft polymer-PZT rod,and hard polymer-PZT rod composites is shown.Their dielectricand piezoelectric performances and parameters are also given out as following,such as type 3-3porous PZT k_t~-≥0.425,((?)_m)_t=9.4;type 3-3 sandwich PZT (?)_t≥0.61,((?)_m)_t=12;type 1-3 softpolymer-PZT k_t~-=0.46,((?)_m)_t=12 and type 1-3 hard polymer-PZT rod (?)t=0.56,((?)_m)_t=7.7.