Piezoelectric ceramics is a kind of information ceramic material that can convert mechanical energy and electrical energy to the piezoelectric effect. Piezoelectric ceramics have piezoelectricity and dielectricity, elasticity, etc., and have been widely used in medical imaging, acoustic sensors, acoustic transducers, ultrasonic motors, etc. Piezoelectric ceramics are made by polarizing the internal positive and negative charge centers under mechanical stress, resulting in a piezoelectric effect of the opposite sign of the bound charge on the surface of both ends of the material which has sensitive properties.