You Will Never Believe These Bizarre Truth Behind Piezo Plates And Blocks
Piezoelectric ceramic filter has many advantages both at home and abroad, such as small size, high stability and no need to adjust, compared with LC filter, and its researching work is very active.Japanese scholars use stack Layer ceramic capacitor (MLC) fabrication technology, a laminated ceramic filter for surface mounting has been developed energy harvesting plate , which uses piezoelectric bulk waves, plates piezoelectric sensor is laminated piezoelectric ceramic sheets, and input / output of electrode group is formed with a certain distance between the electrode groups, the input and output electrode groups are respectively connected with the electrodes of the laminated layers at both ends, and the adjacent ceramic layers are alternately polarized along the thickness direction. When a voltage of piezo ceramic generators is applied to the input electrode group, The thickness-expanding vibration of piezo block crystal is generated by the reverse piezoelectric effect of ceramics propagates to the output electrode group, and then the output piezoelectric signal is generated by the positive piezoelectric effect of the piezoelectric ceramic in the output electrode group.In large-scale production, the frequency change of the filter can be achieved by controlling the thickness of the laminate without changing the ceramic material. This laminated piezoelectric ceramic filter has a high degree of directional propagation, high frequency and small spurious output of crystal piezoelectric sensor has been used frequency control and selection in headsets, compact VTRs, video cameras, military radiocommunications equipment, etc. In addition, low-temperature sintered piezoelectric ceramic materials can also be applied to laminated piezoelectric ceramic resonators, laminated piezoelectric couplers,piezoelectric accelerometer sensor, laminated piezoelectric piezoelectric ultrasonic motor and so on.