Structure and properties of Bi(Zn_0.5Ti_0.5)O_3??? Pb(Zr_1???ξTi_ξ)O₃ ferroelectric single crystals grown by a top-seeded solution growth technique

摘要

Bi(ZnTi)O (BZT)-modified Pb(ZrTi)O (PZT) single crystals have been grown using a top-seeded solution growth technique and characterized by various methods. The crystal structure is found to be rhombohedral by means of X-ray powder diffraction. The composition and homogeneity of the as-grown single crystals are studied by laser ablation inductively coupled plasma mass spectrometry and X-ray photoelectron spectroscopy. The domain structure of a (001) platelet is investigated by polarized light microscopy (PLM), which confirms the rhombohedral symmetry. The paraelectric-to-ferroelectric phase transition temperature T is found to be 313°C with the absence of rhombohedral???tetragonal phase transition. The ferroelectric properties of the ternary crystals are enhanced by the BZT substitution with a remanent polarization of 28 μC/cm and a coercive field E of 22.1 kV/cm.