
New Material Compositions that Expand the Operating Domain of Piezoelectric Single CrystalsAward last edited on: 10/29/2018
Sponsored Program
STTRAwarding Agency
DOD : NavyTotal Award Amount
$590,086Award Phase
2Solicitation Topic Code
N06-T034Principal Investigator
Pengdi HanCompany Information
Phase I
Contract Number: N00014-06-M-0227Start Date: 8/1/2006 Completed: 5/31/2007
Phase I year
2006Phase I Amount
$99,749Benefit:
The proposed work will lead to the availability of new and improved PIN-PMN-PT piezoelectric crystals, their growth, optimization and commercialization. Crystals of the new ternary composition harden EC by a factor of 3 compared with pure PMN-PT, with Ec values up to and beyond 6 kV/cm. In addition, the depoling temperature (TR/T) can be increased by ~ 20 C, with a TR/T of 120 C. Moreover, advantages for new piezoelectric crystals will be maintained (e.g., high d, high coupling k), with performance characteristics similar to PMN-PT crystals. Improvements in coercivity will obviate the need for applied bias fields currently required in Navy designs, thereby increasing simplicity, and reducing costs, and will engender more stable and reliable performance characteristics. In addition, systematic property determinations for the new and improved crystals will provide guidelines for their future use and commercial exploitation. The ability to grow large-sized crystals, with enhanced EC and thermal stability, and with detailed property information, will enable the production and use of the next generation of Navy transducers, and commercial ultrasound devices, particularly for high-drive applications.
Keywords:
melt growth, melt growth, PMN-PT Piezoelectric Crystals, transducer, Transducers, hard coercivity, high drive, Doping, coercive field, and radiation damage., thermal de-poling, PMN-PT, PIN-PMN-PT, Piezoelectric Crystal, thermal stability, Reliability
Phase II
Contract Number: N00014-07-C-0857Start Date: 9/5/2007 Completed: 3/12/2009
Phase II year
2007Phase II Amount
$490,337Keywords:
thermal stability, PIN-PMN-PT, high drive, coercive field, Piezoelectric Crystal, PMN-PT, Reliability, transducer