Piezoceramic Components

Piezoelectric Elements in Different Shapes

Piezoceramic components, such as plates, disks or rings, convert mechanical signals, such as force, pressure, strain or acceleration, into electrical voltage, or, vice versa, an electrical voltage into mechanical motion or oscillations. The typical resonant frequencies are between 200 kHz and 10 MHz. The piezo elements are frequently used for generating ultrasonic oscillations, for example, in sensors or for high-power ultrasonic applications.

The shapes and dimensions of the piezo components can be selected within the limits determined by the tools, although the dimensions depend on each other. The minimum dimensions are determined by physical and technological limits. The thickness or wall thickness, for example, is limited by the mechanical strength of the ceramic during machining. In the polarization direction, the dimension is at most 30 mm.  

PI Ceramic integrates piezo ceramics into the customer’s product. This includes both the electrical contacting of the elements according to customer requirements and the mounting of components provided by the customer, and the gluing or the casting of the piezo ceramics. Piezo elements and components can also be delivered in large quantities at very short notice.

Customization

Piezo components are produced in different shapes. Depending on the application, they can be additionally assembled with electrical connections, position sensors, variable contours, etc. On request, we gladly offer you customized products. Contact us!

Labeling of the Polarity

The surface of the electrode which is at the positive potential during polarization is marked with a dot or a cross.

Alternatively and particularly for thin-film electrodes, the direction of polarization is marked by coloring the electrode material: A reddish color indicates the electrode which was at the positive potential during the polarization.

Tolerances

Without further processing ("as fired") the tolerance is ±3 %, or ±3 mm, min.

With post-processing the following tolerances apply:

Length L, Width W

Dimension [mm]Tolerance [mm]  
<15±0.15
<20±0.2
<40±0.25
<80±0.3

 

 

 

 

Diameter OD, ID

Dimension [mm]Tolerance [mm]  
<15±0.15
<20±0.2
<40±0.25
<80±0.3

 

 

Thickness TH

Dimension [mm]Tolerance [mm]  
<10±0.05
<20±0.1
<40±0.15
<80±0.2

 

 

 

DimensionTolerance

Deviation from flatness (slight bending of thin disks
or plates is not taken into account)

<0.02 mm
Deviation from parallelism<0.02 mm
Deviation from concentricity<0.4 mm
Frequency tolerance±5 % (<2MHz) /
±10 % (≥2MHz)
Tolerance of electrical capacitance±20 %

Soldering Instructions for Users

All our metallizations can be soldered in conformance with >> RoHS. We recommend the use of a solder with the composition Sn 95.5, Ag 3.8, Cu 0.7. If the piezoceramic element is heated throughout above the Curie temperature, the material is depolarized, and there is thus a loss of, or reduction in, the piezoelectric parameters.

This can be prevented by adhering to the following conditions under all circumstances when soldering: 

  • All soldered contacts must be point contacts.
  • The soldering times must be as short as possible (≤3 sec).
  • The specific soldering temperature must not be exceeded.

Downloads

pdf
pdf

Catalog: PI Piezoelectric Ceramic Products

Fundamentals, Characteristics and Applications
CAT125
pdf - 10 MB
pdf - 10 MB
pdf
pdf

Technical Note A000T0047

Handling and Electrical Contacting of Piezo Components
pdf - 179 KB
pdf - 182 KB