The piezoelectric transducer can achieve interconversion between electric and sound energy by using the piezoelectric effects which consists of prestressed bolt, electrode ,cap,.piezoelectric ceramic,a radiation and insulation pipe. The features: 1.Low resonance impedance. 2.High mechanical parameter Q 3.High electroacoustic transformation efficiency 4.Good thermal stability 5.Heat productivity. 6.High amplitude, high vibration speed. Application: Piezoelectric ceramic is widely used in all kinds of ultrasonic cleaning machine,. Big power industry cleaning equipment and so on. Carton