TY - GEN
T1 - Advances in manufacturing relaxor piezoelectric single crystals
AU - Luo, J.
AU - Zhang, S. J.
AU - Shrout, T. R.
AU - Hackenberger, W. S.
PY - 2007
Y1 - 2007
N2 - Relaxor piezoelectric single crystal, lead magnesium niobate - lead titanate (PMN-PT), has potential to greatly improve both piezoelectric actuator and transducer applications. High-quality PMN-PT single crystals with the diameter over 50mm have been successfully grown along different crystallographic directions by the Bridgman technique at TRS. As a solid solution system, PMN-PT inevitably exhibits an inhomogeneous composition distribution along the boule in conventional Bridgman growth, which results in the variation of dielectric and piezoelectric properties along the growth direction and limits the useful portion in each crystal boule. Zone melting growth technique has been developed to further increase the composition uniformity in solid solution PMN-PT crystal. By using zone-melting growth technique, PMN-PT crystals with 22-25mm in diameter and 150mm long have been grown at TRS. This paper reviews the progress in Bridgman and zone-melting growth of PMN-PT with the emphasis on uniformity improvement. In addition, TRS recently developed new piezoelectric crystals with modified PMN-PT compositions, which have expanded operating temperature ranges to 120°C and coercive field to 5kV/cm. Since these new materials were grown directly from the melt by the Bridgman technique, commercialization is achievable by applying the well established crystal growth process for PMN-PT.
AB - Relaxor piezoelectric single crystal, lead magnesium niobate - lead titanate (PMN-PT), has potential to greatly improve both piezoelectric actuator and transducer applications. High-quality PMN-PT single crystals with the diameter over 50mm have been successfully grown along different crystallographic directions by the Bridgman technique at TRS. As a solid solution system, PMN-PT inevitably exhibits an inhomogeneous composition distribution along the boule in conventional Bridgman growth, which results in the variation of dielectric and piezoelectric properties along the growth direction and limits the useful portion in each crystal boule. Zone melting growth technique has been developed to further increase the composition uniformity in solid solution PMN-PT crystal. By using zone-melting growth technique, PMN-PT crystals with 22-25mm in diameter and 150mm long have been grown at TRS. This paper reviews the progress in Bridgman and zone-melting growth of PMN-PT with the emphasis on uniformity improvement. In addition, TRS recently developed new piezoelectric crystals with modified PMN-PT compositions, which have expanded operating temperature ranges to 120°C and coercive field to 5kV/cm. Since these new materials were grown directly from the melt by the Bridgman technique, commercialization is achievable by applying the well established crystal growth process for PMN-PT.
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U2 - 10.1109/ISAF.2007.4393328
DO - 10.1109/ISAF.2007.4393328
M3 - Conference contribution
AN - SCOPUS:51349122272
SN - 1424413338
SN - 9781424413331
T3 - IEEE International Symposium on Applications of Ferroelectrics
SP - 557
EP - 560
BT - 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
T2 - 2007 16th IEEE International Symposium on the Applications of Ferroelectrics, ISAF
Y2 - 27 May 2007 through 31 May 2007
ER -