Considering a reduced acoustic impedance and high coupling factor, 1-3 random fiber composites have superior properties for ultrasound transduction. 1-3 fiber Piezo composites are prepared by epoxy infiltration of fiber bundles and dicing of the cube-shaped blocks perpendicular to the direction of the fibers. This patented method is also called Arrange & Fill. A random distribution of the fibers shows excellent suppression of lateral frequency modes. Using Piezo ceramic fibers with sizes 105µm, 250µm and 800µm yields fill factors of 35%, 65% and 80%.
Due to the production methods used, raw blocks of regular fiber Composite can be up to 10cm in length. These blocks can then be sliced into plates of a desired frequency or machined in to various specified shapes, including precise concave or convex contours.
| Fiber Size/Fill | Dimensions (mm) | Frequency |
| 105µm/35% | 30 x 30 | 3 to 10 MHz |
| 40 x 40 | 3 to 10 MHz | |
| 50 x 50 | 3 to 6 MHz | |
| 60 x 60 | 3 to 5 MHz | |
| 250µm/65% | 40 x 40 |
200KHz to 5 MHz
|
| 50 x 50 |
200KHz to 5 MHz
|
|
| 60 x 60 |
200KHz to 5 MHz
|
|
| 800µm/80% | 50 x 50 |
200KHz to 5 MHz
|
| Fiber Size/Fill | Dimensions (mm) | Frequency |
| 105µm/35% | 50 x 50 | 3 to 6 MHz |
| 60 x 60 | 3 to 5 MHz | |
| 250µm/65% | 50 x 50 |
200KHz to 5 MHz
|
| 60 x 60 |
200KHz to 5 MHz
|
|
| 800µm/80% | 50 x 50 |
200KHz to 5 MHz
|
