Abstract Two ferroelectric single crystals Pb0.37Ba0.63 Nb2O6 and Pb0.30Ba0.533Na0.306Li0.028 Nb2O6,pulled from melt by Czochralski technique, have been studied. By X-ray diffraction, it has been determined that both of two crystals belong to the tetragonal system with lattice parameters a = 12.493 ?, c = 3.984 ? for PBN, and a = 12.493 ?, c=3.970 ? for Li, Na-doped PBN. All of the dielectric, elastic, and piezoelectric coefficients of the two crystals have been measured. The results show that PBN crystal possesses good piezoelectric character with d15≈108×10-12C/N. This crystal could be a promising material for piezoelectric transducers operating in the shear mode. The dielectric constants are reduced, while the Tc is enhanced obviously in PBN doped by Li and Na Ions.
XU YU-HUAN,WANG HONG,CHEN HUAN-CHU. DETERMINATION OF STRUCTURE AND DIELETRIC, ELASTIC AND PIEZOELECTRIC COEFFICIENTS IN FERROELECTRIC SINGLE CRYSTALS PbxBa1-xNb2O6 AND Li, Na-DOPED PbxBa1-xBb2O6. Acta Phys. Sin., 1988, 37(8): 1350-1356.