The piezoelectric layers comprise a plurality of piezoelectric crystal grains.

The piezoelectric telescopic directions of the two piezoelectric tubes are the same, which are axial.

The plurality of piezoelectric bodies are formed of a plurality of piezoelectric single crystal bodies (61).

The actuator assembly includes one or more piezo elements, which may be in the form of piezo stacks.

Piezoelectric switches and methods of forming piezoelectric switches.

The material, even when in the form of a thin layer, has excellent piezoelectric properties.

The emitting surfaces of the transducer elements contained in the first to nth transducer element sub-groups are disposed oriented in different directions for each transducer element sub-group.

Each of the multiple transducer element groups has first to nth transducer element sub-groups.

The plurality of minute piezoelectric element units are disposed so that, in the short axis direction, the number of the piezoelectric units, or the size of the piezoelectric elements, are changed.

Piezoelectric compositions are provided wherein mechanical and piezoelectric properties can be separately modulated.

The plurality of piezoelectric elements comprise at least two types of piezoelectric elements (1, 2) of different thickness.

The piezoelectric elements are in the form of discrete particles, piezoelectric fibers, filaments, transducers, and actuators.

Specifically, the invention is directed to a method for fabricating lead-free piezoelectric free standing films having enhanced piezoelectric properties.

The invention relates to an implant with piezoelectric properties.

As a result, there is obtained a piezoelectric device having good initial piezoelectric characteristics, which is reduced in change in the piezoelectric characteristics over time.