The laminated co-fired piezoelectric actuator is an integrated solid electronic component that is made by co-firing the cast ceramic substrate and the printed electrode layer after being alternately stacked, and has the advantages of low driving voltage, high displacement accuracy, large output force, and fast response speed. . Based on the characteristics of piezoelectric driving, this component has been widely used in high pressure common rail fuel injection systems, which greatly improves the measurement accuracy of fuel injection, reduces fuel consumption and noise, and improves engine power. Only in 2012, Continental AG has produced 50 million piezoelectric actuators for use in the automotive sector. At present, in the technical and market areas of this component, foreign companies such as Germany, Germany, Bosch, and Japan's TDK (EPCOS) occupy a monopoly position. The piezoelectric actuators used today are based on PZT piezoelectric ceramics, but PZT ceramics have a potential environmental impact during production and disposal. BNT ceramics have become the raw materials for next-generation piezoelectric actuators favored by researchers due to factors such as environmental friendliness, large deformation, high stiffness, and electrical fatigue resistance. However, BNT ceramics have problems such as high driving electric field and excessive co-firing temperature. In the recent research process, researchers at the Institute of Optics and Electronics, Chinese Academy of Sciences obtained controllable composition, phase structure, and grain size to obtain BNT ceramics with large amounts of strain under low driving electric fields. Based on this ceramic, a BNT ceramic piezoelectric driver prototype was further developed by the process of casting co-fired laminates. Compared to the best-performing BNT piezo actuators reported so far, the driving electric field/voltage is further reduced by one-third, which is an important step toward practical application and closer to the application parameters of PZT drivers. At the same time, due to the low-temperature sintering technology, the noble metal content of the inner electrode is reduced, and the manufacturing cost of the device is lower. The research results have applied for a patent and published two papers in professional journals. The project was supported by the National Natural Science Foundation of China (51402297) and the Chinese Academy of Sciences Green Promotion Association (2016334). Hand Shower,Retro Design Hand Shower,Anti-rust Hand Shower,High Quality Hand Shower KaiPing HuiPu Shower Metalwork Industrial CO,LTD , https://www.hp-shower.com
Fig. 1: Field induced strain behavior of BNT piezoelectric ceramics 
Figure 2: Prototype and Sectional Structure of BNT Piezoelectric Actuator