How to judge the positive and negative poles of piezoelectric ceramics?

How to judge the positive and negative poles of piezoelectric ceramics?

The positive and negative poles of piezoelectric ceramics transducer, to be precise, from a professional point of view, such a device itself is also an electronic component. and there are two copper circular pads, all of which are placed in the piezoelectric ceramic ring. From the above, this current will have different alternating piezoelectricity ceramics .

Piezoceramics transducer will vibrate comprehensively according to the frequency that occurs according to their size. According to the principle of piezoelectric ceramic transducers, electronic watches or timers can be used to fully understand the sound. piezoelectric ceramics also have positive and negative electrodes. I believe many people know this very well.

However, the judgment method about it is basically that the wires are drawn out on both sides of the positive and negative poles. The connection of the test lead is also positive, if it is negative, then it is connected to the black test lead.

Piezoelectric ceramic sheets have no piezoelectric effect or reverse piezoelectric effect because their interiors cancel each other out before being polarized. So the answer to question one is no. As for the temperature resistance of the piezoelectric ceramic sheet, it is usually about half of the curie temperature. However, the curie temperature of piezoelectric ceramic sheets of different materials is different. Specifically, the storage of piezoceramic transducer sheets is uncomplicated and can be performed simply. A certain number of piezoelectric ceramic sheets are first wrapped with a layer of wire, and then wrapped with another layer of wire to form a cylinder, which is then stored. However it can also be stored individually in a pouch, just avoid scratching and dropping the silver layer. The electromechanical conversion of piezoelectric ceramic sheets requires vibration, and the commonly used vibration modes mainly include: the movement of vibrating particles and the propagation of waves are carried out along the direction of the strip. Second, the bending vibration of the long strip thickness will glue the vibrator together, and one piece will stretch and deform, and the other will shrink and deform. Both the motion of the vibrating particles and the wave propagation in the radial diffusion of the wafer expand along the radial direction. The thickness of the wafer is bent and vibrated to laminate the vibrator, and the thickness of the wafer is bent and vibrated. Thickness shear vibration can be realized when the polarization direction and the exciting electric field are perpendicular to each other.