Abstract: The high-pressure synthesis of lead zirconate titanate (PbZr_0.52Ti_0.48O₃ or PZT) ceramics was investigated with two kinds of precursors as raw materials. The XRD and Raman measurements show that with a mixture of PbO and ZrO₂ and TiO₂(in molar ratio of 1∶0.52∶0.48) as precursor, the three-phase mixture of PbTiO₃, ZrO₂and Pb can be obtained under 1.5 GPa and 3.6 GPa at 880~1 061 ℃. A few solid solutions of PZT are formed only at 880 ℃. The single phase PbZr_0.52Ti_0.48O₃ can be synthesized from a mixture of PbO and B-state precursor Zr_0.52Ti_0.48O₂ (in molar ratio of 1∶1) in a temperature range of 710~812 ℃ under 1.5 GPa without intermediate phase PbTiO₃. The various temperature Raman spectra of the sample synthesized

Key words: PbZr_0.52Ti_0.48O₃,