The research of low temperature sintering piezoelectric ceramics has been further developed for bolt-clamped ultrasonic transducer , mainly in the research and application of new low-temperature sintering piezoelectric materials.In general, improperly reducing the sintering temperature of ceramic materials, PZT piezo ceramiclead to performance degradation. While is greatly reducing the temperature, but also to ensure the density of porcelain body and good performance of piezoelectric ceramic material is the key to low-temperature sintering of piezoelectric sensor circuit .Currently, low-temperature sintered piezoelectric ceramic materials are mainly used for the production of laminated ceramic devices, domestic and foreign research.The emphasis is on the development of high-performance, low-sintering temperature piezoelectric ceramic materials and electrode piezoceramic disc crystal for laminated structures, design of new laminated structures, improvement of device production processes, etc. The new functional piezo ceramic devices are adaptable to miniaturization of electronic devices, High-performance and multi-functional piezoelectric sensor datasheetis conducive to integration, its application is very broad, which aroused people's attention.Currently,mechanical cleaning, high-pressure recoil, chemical cleaning, ultrasonic cleaning and other means of cleaning the membrane,which is to restore the membrane flux common method. Ultrasound is an effective cleaning technology, ultrasonic cavitation can not only ultrasonic atomizing piezoelectric , dispersed in the membrane surface of the formation of pollution, but also to many other traditional methods can not be cleaned to the dead ends, voids. the ultrasonic field with the membrane separation process can enhance the mass transfer in the process of membrane separation and play the role of effectively controlling membrane fouling.