TABLE
I: Typical Uses |
Channel
Materials for Common Applications |
| CHANNEL MATERIAL |
C300 |
C600 |
C1300 |
C5400 |
C5500 |
C5600 |
C5700 |
C5804 |
| NAVY MATERIAL TYPE * |
|
|
IV |
I |
II |
V |
VI |
III |
| Low
Power Sonar |
X |
X |
X |
X |
|
|
|
X |
| High Power Sonar |
|
|
X |
X |
|
|
|
X |
| Ultrasonic
Cleaners |
|
X |
|
X |
|
|
|
X |
| Depth Sounders |
X |
|
X |
X |
|
|
|
|
| Ultrasonic
Welders |
|
|
|
X |
|
|
|
X |
| Hydrophones, Shallow |
X |
|
|
|
X |
X |
X |
|
| Hydrophones,
Deep |
|
|
|
X |
|
|
|
X |
| Vibration Pickups |
X |
|
|
|
X |
X |
X |
|
| Accelerometers |
|
|
|
|
X |
X |
X |
|
| Receiver Transducers |
X |
|
|
|
X |
X |
X |
|
| High
Static Motion Transducers |
|
|
|
|
X |
X |
X |
|
| High Dynamic Motion Transducers |
|
|
|
X |
|
|
|
X |
| Non-Destructive
Testing |
|
|
|
X |
X |
X |
X |
X |
| High-Voltage Generators |
|
|
|
X |
|
|
|
X |
| Audible
Alarms |
|
|
|
|
X |
X |
X |
|
* All Navy type materials refer to DOD-STD-1376 (ships).
Definition of Material Properties
Note: The units used to express the electrical, mechanical, and
electromechanical properties of piezoelectric ceramics are in the MKS system of units.
Dielectric (K) Constant
Values shown are for the relative dielectric constant - the ratio of
the dielectric permitivity of the material to the dielectric permitivity of a vacuum
(Îo). Example: KT3 = ÎT3 / Îo
The subscript references the direction of the electric field and
charge density. The superscript T describes the condition of constant stress - no
mechanical constraint. Supsrscript S would denote a condition of constant strain -
material completely restrained to prevent any mechanical deformation.
The values of K in the tables are for the mechanically free,
constant stress, low field, low frequency (well below the first resonance) condition and
are normally measured at 1 kHz.
Stress
Applied force per cross-sectional area.
Strain
The ratio of the change in a dimension to that dimension itself.
Curie Point
The temperature at which a ceramic becomes completely depolarized.
Dissipation Factor (tan d)
The dielectric loss factor in the material is espressed as the
tangent of the loss angle, i.e., the ratio of the effective series resistance to the
effective series reactance.
Electric Field
The ratio of the voltage applied or developed to the distance between the
electrodes.
Piezoelectric (d) Constant
This property relates the mechanical strain devleloped to the applied electric
field.
 
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