Complete set of material constants of 0.95(Na0.5Bi 0.5)TiO3-0.05BaTiO3 lead-free piezoelectric single crystal and the delineation of extrinsic contributions

Limei Zheng, Xiujie Yi, Shantao Zhang, Wenhua Jiang, Bin Yang, Rui Zhang, Wenwu Cao

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Lead-free piezoelectric single crystal 0.95(Na0.5Bi 0.5)TiO3 (NBT)-0.05BaTiO3 was grown by top-seeded solution growth method, which has rhombohedral symmetry with composition near morphotropic phase boundary. Full set of dielectric, piezoelectric, and elastic constants for [001]c poled domain-engineered single crystal was determined. Excellent electromechanical properties and low dielectric loss (d33 = 360 pC/N, d31 = -113 pC/N, d15 = 162 pC/N, k33 = 0.720, kt = 0.540, and tan δ = 1.1%) make it a good candidate to replace lead-based piezoelectric materials. The depolarization temperature (Td = 135 °C) is the highest among all NBT-based materials and its electromechanical coupling properties are very stable below Td. Extrinsic contributions to piezoelectric properties were investigated by Rayleigh analysis.

Original languageEnglish (US)
Article number122905
JournalApplied Physics Letters
Issue number12
StatePublished - Sep 16 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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