The performances of PZT piezoelectric ceramic materials

Because of its low energy consumption, fast response, high rigidity easy control and piezoelectric ceramic materials can be affixed to the surface of the body structure or can be embedded inside the body structure, and the production process of ultrasonic distance sensor is more mature. It has been widely used in smart structures. Different manufacturers use different processes or different raw material ratios to make piezoelectric ceramic materials. Even if the same batch of piezoelectric materials are produced by the same manufacturer, their performance is different. Therefore, before use, the performance parameters of piezoelectric plate crystalshould be measured through experiments. . Among many piezoelectric material parameters, the transverse coefficient d31 of piezoelectric vibration transduceris a key parameter of the driving element. The author starts from the analytic formula of the displacement response and electric field of the double-layer piezoelectric beam under the electric field, and inversely deduces the electrical performance parameters of the piezoelectric ceramic material. The static method, the dynamic line transmission method and the dynamic capacitance method is measuring piezoelectric parameters of pickup piezo transducer in this paper.which reduce the number of intermediate measurement steps and equivalent processing methods, and are easy to implement. Compared with the dynamic displacement method, they have better accuracy. Piezo sounder PZT materials is the core of the piezoelectric ultrasonic motor and has a great influence on the performance of the motor. Generally speaking, for piezoelectric ceramic materials.it is used in piezoelectric ultrasonic motors, we hope that it has the following properties: (1) Piezoelectric ceramic material offer pressure stable electrical performance, good anti-aging properties.(2) The curie point of piezo ceramic ring crystal is high and can work in a wide temperature range; (3) The mechanical strength is good, and the work is not easy to break under the high power(4)it is the higher piezoelectric constant, it has low voltage drive and large output torque; (5)it is high electromechanical coupling coefficient kp; (6) Low dielectric loss of piezoelectric transducer datasheet is accounted for, high mechanical quality factor Q can improve the piezoelectric transducer (vibrator) Efficiency and reduced losses; (7) it is wide operating band. In fact, it is difficult at present to have a piezoelectric ceramic material that satisfies all the above requirements at the same time.