Raman Spectroscopy Studies of Nanocrystalline Lead Zirconate Titanate as Functions of High Pressure

As one of the most important ferroelectric ceramic materials, PbZr_0.52Ti_0.48O₃ (PZT) ceramic has been widely studied because of its extensive industrial application.We prepared the PZT ceramic using a simple water-based sol-gel method, and studied its Raman spectra as a function of high pressure.Raman spectroscopy analysis show that the phase transition pressure from rhombohedral-tetragonal (R+T) to tetragonal-cubic (T+C) phases is 2.61 GPa and the pressure for T+C to C phase is 8.5 GPa.We also measured the dielectric constant of the PZT ceramic, the result suggests that the Curie temperature of the PZT ceramic is 395 ℃.