High-homogeneity high-performance flux-grown Pb(Zn1/3Nb 2/3)O3-(6-7)%PbTiO3 single crystals

Abstract

Large-size, with > 35 mm edge length, high-quality PZN-PT single crystals of a range of compositions have been reproducibly grown from PbO flux with local point cooling and by engineering the isotherms of the solution to promote controlled (001) layer growth of the crystals. Twenty-four plate samples, 22L × 16W × 0.4Tmm 3 in dimensions, were cut parallel to the prevalent (001) layer growth plane from two grown PZN-(6-7)%PT single crystals. The measurements have revealed high homogeneity in composition and poled properties both within individual plates and in between plates, with the Curie temperature T c = 162-165 (≤2°C within plates), free dielectric constant KT = 7200 ± 6% (≤10% within plates), dielectric loss (tan δ)