Materials and design of piezoelectric ceramic transformers Materials for piezoelectric ceramic transformers: It has a high electromechanical coupling coefficient, especially the transverse electromechanical coupling coefficient k31 and the longitudinal electromechanical coupling coefficient k33 o

The polarization direction and vibration direction of the piezoelectric ceramics are along the thickness direction. Therefore, the input and output part of the piezoelectric ceramic resonator of the thickness vibration mode piezoelectric ceramics are longitudinal vibration modes, and the thickness

If two thick PZT5 material piezo disks sheets having the same thickness and polarized electrodes are bonded together, when an externally applied exciting electric field can elongate one of the sheets and the other piece is shortened, bending vibration can be generated. For the sheets bonded in the o

Different parameters of piezoelectric ceramics can be selected according to the needs of the therapeutic dose at the time of treatment to achieve the best effect. Highly vascularized tumors although clinical exposure times often take more than 3s, early studies have shown that short-term exposure is