Synthesis and thermochemistry of new phase BaCe0.7Nd0.2In0.1O2.85

• Published in: Journal of alloys and compounds Vol. 577; pp. 148 - 151
• Main Authors: Matskevich, Nata I., Matskevich, Mariya Yu, Wolf, Thomas, Bryzgalova, Anna N., Chupakhina, Tatyana I., Anyfrieva, Olga I.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15-11-2013
• Subjects: Alloys; Barium cerate doped by neodymium and indium; Calorimetry; Enthalpy; Formation enthalpy; Oxides; Synthesis; Thermochemistry; Thermodynamic stability; X-rays; Thermodynamic stability; Synthesis; Formation enthalpy; Barium cerate doped by neodymium and indium
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.04.194

•We synthesized new phase BaCe0.7Nd0.2In0.1O2.85.•We measured formation enthalpy of BaCe0.7Nd0.2In0.1O2.85.•The phase is thermodynamically stable with respect to decomposition into binary oxides.
The BaCe0.7Nd0.2In0.1O2.85 phase has been prepared from BaCO3, CeO2, Nd2O3 and In2O3. X-ray measurements have showed that BaCe0.7Nd0.2In0.1O2.85 has an orthorhombic structure (Pmcn space group). The standard formation enthalpy of BaCe0.7Nd0.2In0.1O2.85 has been determined by solution calorimetry combining solution enthalpies of BaCe0.7Nd0.2In0.1O2.85, BaCl2+0.7CeCl3+0.2NdCl3+0.1InCl3 mixture in 1M HCl with KI and literature data. We determined the thermodynamic stability of Nd(In)-doped barium cerate with respect to mixtures of binary oxides. On the basis of the data we established that above-mentioned mixed oxide is thermodynamically stable with respect to their decomposition into binary oxides at room temperatures. We also established that BaCe0.7Nd0.2In0.1O2.85 is thermodynamically favored than BaCe0.8Nd0.2O2.9.