Piezo Ceramics

Oscillation mode and the deformation are defined by the geometry of the ceramic body, orientations of the electric field and polarization as well as the mechano-elastic properties

As the tensile strength is low for piezoceramics it is recommeneded to apply a preload onto the piezo actuator. It is important to optimize the preload on the piezo actuator to accommodate the [...]

As it is hard to define the maximum velocity of a piezo actuator, which is mostly dependant of the application, more common is to define the time it takes for an actuator to expand from resting [...]

The coupling factor k is a measure of the magnitude of the piezoelectric effect (not an efficiency factor!). It describes the ability of a piezoelectric material to convert electrical energy into [...]

A strong electric field of several kV/mm is applied to create an asymmetry in the previously unorganized ceramic compound. The electric field causes a reorientation of the spontaneous [...]

Soft piezo ceramic materials can be polarized fairly easily even at relatively low field strengths. The advantages of soft PZT materials are their large piezoelectric charge coefficient, moderate [...]

At temperatures below the Curie temperature TC , the lattice structure of the PZT crystallites becomes distorted and asymmetric. This brings about the formation of dipoles and the rhombohedral [...]

The piezoelectric effect of natural monocrystalline materials such as quartz, tourmaline and Rochelle salt is relatively small. Polycrystalline ferroelectric ceramics such as lead zirconate [...]

Pressure generates charges on the surface of piezoelectric materials. This direct piezoelectric effect, also called generator or sensor effect, converts mechanical energy into electrical [...]

In 1880, the French physicists brothers of Jacques & Pierre Curie discovered that pressure generates electrical charges in a number of ceramics and crystals; they called this phenomenon the [...]