Comparison of piezoelectric ceramics crystal

1) Is there a difference between a piezoelectric ceramic crystal and a quartz crystal?
The accuracy of Pzt material piezoelectric discs and quartz crystals are more or less the same if they are compared with each other. The main is focusing on the accuracy or temperature and related stability. Relatively speaking, the accuracy of piezo quartz crystals is more or less .the number will be different. Many people are very concerned about whether they can reach the last six decimal places, and their units are basically used for related calculations.

2) Can the piezoelectric ceramic crystal parameters be changed?
Relatively speaking, parameters of piezoelectric ceramic crystal will have more or less this series of changes,they do not change with the changes in conditions, but it is important to note that their thickness, more or less have a certain relationship with the diameter, Therefore, it will affect the classic coefficient of piezoelectric ceramic discs, and it will also affect the height of elasticity. Therefore, in the process of actual consideration, all these things must be taken into account.

3) Why does piezoelectric ceramics have polarity?
While the piezoelectric ceramic layer is actually working, if the force is uniform, there will be charge accumulation on the two surfaces, and this can generate a certain voltage molecule, which is also polarized, so they have positive and negative .From the macro point of view, the points are also charge accumulation. Piezoelectric ceramics will be able to generate positive and negative electrodes, and they are still polar in this regard. This can be grasped according to the situation.