what is a piezoelectric transducer made of

                what is a piezoelectric transducer made of

 

    Layered piezoelectric ceramics is also a hot topic in piezoelectric ceramics research. It has good fatigue strength, high Curie temperature, obvious anisotropy of electromechanical coupling coefficient, low aging rate, high resistivity, and low sintering temperature. Characteristics of piezo ceramic spherehave been extensively studied. They are applicable to high-temperature, high-frequency fields, ferroelectric memories, displays, etc. However, they also have the disadvantages of piezo disc element piezoelectric activity, large coercive fields, and the like. Currently, they are mainly doped with various perovskite structures. Material modification of BNT piezoelectric ceramics.

Tadashi piezo ceramic ring is doped with Bi4Ti3O12 (BIT) based on Nb5 + and V5 + , resulting in (BI4Ti3 - xNbxO12) BITN and (Bi4Ti3 - xVxO12) BITV densities of more than 95% of theory. Doping to replace Ti5+ in SBTi ceramics shows that when Ti is replaced by V, both the density and the Curie temperature of the ceramic are improved. Li Yongxiang et al [31] doped V5 + and W6 + in CaBi4Ti4O15 (CBT). The results show that doping piezoelectric tube can increase the remanent polarization of the material and reduce its coercive field. In W6 + doped CBT ceramics, although the remanent polarization is lower than that before doping, the coercive field is also reduced, so a small amount of doping can still improve the piezoelectric performance, but compared with V5 +, ultrasonic welding transducer is doping improves piezoelectric performance.