Tricks You Must Know When Using Piezo Discs And Cylinders.

The development of piezoelectric ceramics has entered a new phase. From the 94 ' s to the 74 ' s, piezoelectric ceramics have been improved constantly and gradually, ultrasonic plate transducer became perfect. Such as the use of a variety of elements modified lead zirconate titanate binary piezoelectric ceramics, lead zirconate titanate based ternary, quaternary piezoelectric ceramics and in recent years, lead - free piezoelectric ceramics should also be transported health. These materials piezoelectric components have excellent performance, simple manufacture, low cost, wide application and are favored by people. The microstructure of a piezoelectric sensor cost material is the most important among the composition - process - structure - properties in terms of its compositional choice, which determines the process parameters required for the preparation of the material, the crystal structure and the ultrasonic atomizing piezoelectric is to be formed in the final product determine the product performance. Not all materials have piezoelectricity, but all asymmetric materials have more or less some piezoelectric transducer materials, whereas for most piezoelectric ceramics the crystal structure is of the perovskite type. Piezoelectric effect is due to the deformation of the crystal under the mechanical force, causing the mutual displacement of charged particles, the total torque of the crystal changes caused. Due to the existence of polar axis, there is no central symmetry in the crystal of the symmetrical point group. The deformation caused by the mechanical force can cause the change of the total torque, so the piezoelectric effect exists. However, the piezoelectric effect of a piezoelectric body is related to its polarization strength. Therefore, the piezoelectric effect of piezoelectric sensor crystal is generated in certain directions only under the force (or electric field) in some directions. In order to utilize the piezoelectric effect, Ferroelectric ceramics need to be polarized, that is, the spontaneous dipole moment of all ferroelectric grains is turned by an external force (or electric field) to align the structure of the domains in the particles to obtain the corresponding point group.