ABSTRACT

Temperature dependence of heat capacity of the La2Zr2O7, Nd2Zr2O7, Sm2Zr2O7 and LaYO3 are measured in the temperature range of 298.15-1373 K by differential scanning calorimetry (DSC) and micro-calorimetry. The enthalpy of formation from oxides of LaYO3 was measured by hightemperature lead borate solution calorimery. Transformations in the LaYO3 were experimentally studied using DTA. The obtained results for heat capacity and enthalpy of formation of LaYO3 and temperatures of transformations were used to re-optimize thermodynamic parameters of the La2O3- Y2O3 system.

Compounds

#	Formula	Name
1	La2O7Zr2	lanthanum zirconium oxide
2	Nd2O7Zr2	dineodymium(III) dizirconium(IV) oxide
3	O7Sm2Zr2	samarium zirconium oxide (Sm2Zr2O7)
4	LaO3Y	lanthanum yttrium oxide (LaYO3)
5	La2O3	lanthanum oxide
6	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 enthalpy, kJ/mol ; Crystal	Lower temperature, K; Crystal Pressure, kPa; Crystal Upper temperature, K; Crystal		Crystal	Drop calorimetry	1
POMD	1	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	20
POMD	2	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	X-ray diffraction	1
POMD	2	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	20
POMD	3	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	X-ray diffraction	1
POMD	3	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	20
POMD	4	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal		Crystal	X-ray diffraction	1
POMD	4	Molar enthalpy, kJ/mol ; Crystal	Lower temperature, K; Crystal Pressure, kPa; Crystal Upper temperature, K; Crystal		Crystal	Drop calorimetry	1
POMD	4	Molar heat capacity at constant pressure, J/K/mol ; Crystal	Temperature, K; Crystal	Pressure, kPa; Crystal	Crystal	Small sample (50 mg) DSC	20
RXND	5 6 4	Molar enthalpy of reaction, kJ/mol				Solution calorimetry	1

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Calorimetric investigation of the La2Zr2O7, Nd2Zr2O7, Sm2Zr2O7 and LaYO3 compounds and CALPHAD assessment of the La2O3-Y2O3 system

Fabrichnaya, O., Kriegel, M. J., Seidel, J., Savinykh, G., Ogorodova, L. P., Kiseleva, I. A., Seifert, H. J.

ABSTRACT