Preparation of lead-zirconiate-titanate using lead hydroxide by sol-gel process

Abstract

Lead zirconate titanate (PZT) powder was prepared by the sol-gel method. Lead hydroxide, Zr butoxide, and Ti butoxide were used as starting materials. PZT powders were crystallized at about 773K with through out the precursors. Thermo gravimetric and differential thermal analysis (TG-DTA) were used to measure the weight changes of the dried gels to determine the annealing temperature. TG-DTA curve of the dried gels indicated that the thermal decomposition of organics occurred below 873K. The results of X-ray diffraction analyses showed that the pylochlore phase formed below 873K, and the perovskite phase was formed between 873K and 973K. The powder calcinated at 873K was pressed into pellet at 30MPa and additionally pressed by CIP at 100MPa. This sample was sintered at 1273K. The dielectric constant of the pellet was also measured.