Lead-free piezoelectric ceramics are widely used in many fields, such as sensors, transducers, ultrasonic motors, electronic musical instruments, etc. With the continuous development of technology and the continuous expansion of applications, the market demand for lead-free piezoelectric ceramics will continue to increase. At the same time, the research and development of lead-free piezoelectric ceramics will also promote the development of related industries, such as new energy, medical care, environmental protection and other fields. In this context, research and development of high-performance environmentally friendly lead-free piezoelectric ceramics is of great scientific significance and urgent market demand.