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Crystals 2014, 4(3), 331-341;

Growth and Characterization on PMN-PT-Based Single Crystals

H. C. Materials Corporation, 479 Quadrangle Dr., Suite-E, Bolingbrook, IL 60440, USA
Author to whom correspondence should be addressed.
Received: 1 May 2014 / Revised: 2 July 2014 / Accepted: 3 July 2014 / Published: 16 July 2014
(This article belongs to the Special Issue Piezoelectric Crystals)
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Lead magnesium niobate—lead titanate (PMN-PT) single crystals have been successfully commercialized in medical ultrasound imaging. The superior properties of PMN-PT crystals over the legacy piezoelectric ceramics lead zirconate titanate (PZT) enabled ultrasound transducers with enhanced imaging (broad bandwidth and improved sensitivity). To obtain high quality and relatively low cost single crystals for commercial production, PMN-PT single crystals were grown with modified Bridgman method, by which crystals were grown directly from stoichiometric melt without flux. For ultrasound imaging application, [001] crystal growth is essential to provide uniform composition and property within a crystal plate, which is critical for transducer performance. In addition, improvement in crystal growth technique is under development with the goals of improving the composition homogeneity along crystal growth direction and reducing unit cost of crystals. In recent years, PIN-PMN-PT single crystals have been developed with higher de-poling temperature and coercive field to provide improved thermal and electrical stability for transducer application. View Full-Text
Keywords: PMN-PT; PIN-PMN-PT; piezoelectric crystal; crystal growth; piezoelectric property PMN-PT; PIN-PMN-PT; piezoelectric crystal; crystal growth; piezoelectric property

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Tian, J.; Han, P. Growth and Characterization on PMN-PT-Based Single Crystals. Crystals 2014, 4, 331-341.

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