Abstract: Samples BaZr_1-xYxO₃(x=0,0.05,0.10,0.15,0.20) were prepared by solid-state reaction method under high-pressure and high-temperature. XRD and Raman measurements show that the products obtained by solid state reaction method at 1 300 ℃ belonged to cubic perovskite structure, but part of high degree diffract peaks split slightly. The samples （x=0,0.05） were in pure cubic perovskite structure under high pressure (3.6 GPa) and temperature (500 ℃), which shows that press can accelerate the reaction. But some BaCO₃ and m-ZrO₂ appeared in other samples （x≥0.1）, which shows that press baffled the reaction. Under 3.6 GPa at1 000 ℃, the peaks of BaO appeared clearly and increased with the content of Y³⁺. Therefore, to synthesis cubic perovskite structure BaZr_1-xYxO₃ under high-pressure and high-temperature, the temperature should be below 500 ℃.

Key words: high-pressure and high-temperature synthesis, cubic perovskite, Raman spectrum, structure