piezoelectric ceramics crystal for ultrasonic motor

                            piezoelectric ceramics crystal for ultrasonic motor

Because of its low energy consumption, fast response, high rigidity, and easy control, 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 piezoelectric ring crystal 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 batchs of piezoelectric transducer PZTmaterials are produced by the same manufacturer, their performance is different. Therefore, before use, the performance parameters should be measured through experiments. . Among many piezoelectric material parameters, the transverse piezoelectric coefficient d31 of piezoelectric sensor circuit is a key parameter of the driving element. The author starts from the analytic formula of the piezoelectric power generation 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 of radial mode piezoelectric tubes is measuring piezoelectric parameters in this paper that 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 expansion sensor. Electric ceramic is the core of the piezoelectric ultrasonic motor and has a great influence on the performance of the motor. Generally speaking, for the piezoelectric ceramic material ,it is being used in the piezoelectric ultrasonic motor, we hope it has the following properties: (1) Piezoelectric ceramic material ,it has stable piezoelectricity performance, good anti-aging performance; (2) High Curie point,piezoelectric energy harvesting can work in a wide temperature range; (3) Good mechanical strength, working is not easy to break under high power (4) high pressure Electric constant d33, achieving low voltage drive and large output torque; (5) high electromechanical coupling coefficient kp; (6) low dielectric loss tan,