Temperature dependence of heat capacity of the Eu2Zr2O7 and Y2O3 is measured in the temperature range of 298.15-1373 K by differential scanning calorimetry (DSC). Phase transformation in the Eu2Zr2O7 was experimentally studied using differential thermal analysis (DTA) up to 2173 K and temperature of pyrochlore to fluorite transition was established to be 2128 K. Eutectic reaction was determined by DTA to be 2326 K. Peritectoid reaction F+B=C was established to occur at ~1823 K based phase equilibrium studies. Phase compositions were determined by SEM/EDX. The obtained results for heat capacity of the Eu2Zr2O7, temperatures of transformations and phase compositions were used to optimize thermodynamic parameters of the Eu2O3-ZrO2 system.
Compounds
#
Formula
Name
1
Eu2O7Zr2
europium zirconate
2
O3Y2
yttrium oxide (Y2O3)
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.
Type
Compound-#
Property
Variable
Constraint
Phase
Method
#Points
POMD
1
Mass density, kg/m3 ; Crystal
Temperature, K; Crystal
Pressure, kPa; Crystal
Crystal
X-ray diffraction
1
POMD
1
Molar heat capacity at constant pressure, J/K/mol ; Crystal
Temperature, K; Crystal
Pressure, kPa; Crystal
Crystal
Large sample (1 g) DSC
73
POMD
2
Molar heat capacity at constant pressure, J/K/mol ; Crystal