|
|
| What is New |
- Large-sized and <001>-seeded PMN-PT crystals are available
Recently, <001> seeded large-sized (3 inch diameter 6 inch long) PMN-PT single
crystals have been manufactured routinely using a modified Bridgman technique. The
melt growth method has led to the availability of PMN-PT single crystals for the
commercial applications. The PMN-PT crystals with compositions near the MPB exhibit
anomalously high dielectric and piezoelectric properties making them candidates for
a broad range of applications in acoustic transduction devices such as actuators,
sensors, ultrasonic imaging transducers, underwater acoustics, active vibration
control, transformers, optics, and bulk acoustic wave devices for telecommunications.
- Three new vibration modes of PMN-PT crystal products commercially available now:
- Re-pole able High longitudinal share d36 mode
A discovery, released on July 2004, is the d36 mode that gives the
large value of longitudinal share piezoelectric coefficient d36 as high
as 2500 pC/N for a <110> poled macroscopic orthorhombic symmetry. The maximum
d36 occurs at the xzt +45o cut. It is unique that the
re-pole able capability for the d36 configuration is much preferred
to the application due to the same poling electrodes as the working electrodes.
- Super-High Transverse Shear d15 mode
This product is <111> poled PMN-PT single crystal that works on Transverse
Shear (TS) mode. The highest d15 up to 6000 pC/N at room temperature
were measured on PMN-PT single crystals. The extraordinary high transverse shear
piezoelectric d15 up to 6000 pC/N in rhombohedral single crystal (3m)
occurs at the zxt -22.5o cut or zxt 157.5o cut. It is
highly desirable that cross-talk from d16 can be eliminated completely.
- High Transverse extension d31 mode
This product is a<011> poled PMN-PT crystal that works on transverse Extension
(TE) mode. The highest d31 up to 1800 pC/N at room temperature were
measured on PMN-PT single crystals. the maximum transverse extension
piezoelectric coefficient d31 exits in the multi-domain with
macroscopic orthorhombic symmetry (mm2) and zxt 0o cut.
Home |
About Us |
What's New |
PMN-PT Products |
PMN-PT Properties |
New Aplications |
Synthetic Mica |
Rare Earth |
Contact Us
479 Quadrangle Drive, Suite E, IL 60440, USA
Phone: (630) 226-9080 Fax: (630) 226-9010 Toll free (866) 909-8061
For more information: info@hcmat.com
For sales: sales@hcmat.com
|
|
