Comparative Study of Powders Based on the ZrO2-Y2O3-CeO2 System Obtained by Various Liquid Phase Methods of Synthesis

摘要

Using the liquid-phase methods of synthesis-the coprecipitation of hydroxides and the hydrothermal method-mesoporous xerogels are obtained based on the ZrO2-Y2O3-CeO2 system with 5-8-nm particles and powders (after the heat treatment of xerogels at 600 degrees C) with a coherent scattering region (CSR) size of 9 to 10 nm and S-sp = 96-156 m(2)/g. After calcination at 1400 degrees C, the powders are transformed into tetragonal solid solutions with a CSR size of 65 nm in the synthesis by the coprecipitation method, and they are transformed into solid solutions with a CSR size of 84 nm with a high degree of tetragonality of c/a = 1.438-1.431 in the synthesis by the hydrothermal method.