X-ray Diffraction and dielectric constant of lanthanum doped barium titanate ceramics

摘要

Undoped barium titanate and lanthanum (La) doped barium titanate (BaTiO_3) were studied for ferroelectric properties with the formula of Ba_(1-x)La_xTi_(1-x/4)O_3 for x=0.1 and being prepared by using conventional solid state method reaction. The pure phase of this composition which x=0 were found at final heating temperatures starting from 1300°C and x=0.1 at 1350°C for overnight in air with intermittent grinding. The changes in the crystal structure of the composition were detected by using X-ray diffraction. Impedance Spectroscopy analysis is carried out to determine the dielectric properties for undoped BaTiO_3 and La doped BaTiO_3 for x=0.1.