Solid-liquid equilibria in the ThO2 –ZrO2 system: an experimental study
In this work, solid-liquid equilibria of the pseudo-binary system ThO2-ZrO2 are investigated. A series of different molar ratios (80:20, 60:40, 40:60, and 20:80 ThO2:ZrO2)of ThO2 and ZrO2 were synthesised at JRC-Karlsruhe using an external sol-gel method. The XRD data of samples sintered at 1650 °C show two-phase behaviour throughout the range of compositions with small solubility (<5%)of ZrO2 in ThO2 and limited solubility of ThO2 in ZrO2.