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Lu Q, Long X, Hu Y. Top-seeded solution growth and characterization of PMN–0.31PT piezoelectric single crystals[J]. Crystengcomm, 2010, 12(12):4317-4320.
2015-04-10 15:46     (浏览次数)

Abstract

Piezoelectric single crystals of 0.69Pb(Mg 1 / 3 Nb 2 /3)O3–0.31PbTiO3were grown by a top-seeded solution growth method that prevented phase segregation and promoted the (001)-growth. The morphotropic phase boundary ( MPB ) structure was confirmed by X-ray diffraction and the dielectric, piezo- and ferro-electric properties were characterized. A dispersive maximum of dielectric permittivity appears around T C = 135 °C, which slightly shifts towards higher temperatures with increasing frequency, indicating weak relaxor behaviour. The rhombohedral–tetragonal phase transition was detected at 108 °C. The piezoelectric coefficient (d33) was found to be 2080 pC N −1 , with a strain level reaching 0.17% at an electric field of 10 kV cm−1. The longitudinal electromechanical coupling factor k 33 reaches 92%.

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