Effect of La content on characterization of PLZT ceramics

This work has been undertaken with a view to study the effect of lanthanum content on properties of PLZT ceramics. The polycrystalline complex compounds of PLZT with Pb 1− x La x (Zr 0.40Ti 0.60) 1− x/4 O 3, +10% PbO formula were prepared from the nano-size individual oxides powders by hot-pressed process. Transparent PLZT ( x/40/60) bulk ceramics with pure tetragonal phase was obtained. The studies of the microstructures, dielectric and ferroelectric properties of the ceramics were carried out. The experiment results showed that when La content increased from 7 to 13 mol.%, the grain size increased from 2 to 7 μm. La content also effects the dielectric property obviously, the dielectric constant increased with La content increasing. Moreover, the ferroelectric properties are sensitive to the variation of La content.