Synthesis and thermochemistry of new phase BaCe(0.7)Nd(0.2)In(0.1)O(2.85)

The BaCe(0.7)Nd(0.2)In(0.1)O(2.85) phase has been prepared from BaCO(3), CeO(2), Nd(2)O(3) and In2O(3). X-ray measurements have showed that BaCe(0.7)Nd(0.2)In(0.1)O(2.85) has an orthorhombic structure (Pmcn space group). The standard formation enthalpy of BaCe(0.7)Nd(0.2)In(0.1)O(2.85) has been dete...

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Bibliographic Details
Published in:Journal of alloys and compounds 2013-11, Vol.577, p.148-151
Main Authors: Matskevich, Nata I, Matskevich, Mariya Yu, Wolf, Thomas, Bryzgalova, Anna N, Chupakhina, Tatyana I, Anyfrieva, Olga I
Format: Article
Language:English
Subjects:
Alloys
Calorimetry
Enthalpy
Oxides
Synthesis
Thermochemistry
X-rays
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Summary:The BaCe(0.7)Nd(0.2)In(0.1)O(2.85) phase has been prepared from BaCO(3), CeO(2), Nd(2)O(3) and In2O(3). X-ray measurements have showed that BaCe(0.7)Nd(0.2)In(0.1)O(2.85) has an orthorhombic structure (Pmcn space group). The standard formation enthalpy of BaCe(0.7)Nd(0.2)In(0.1)O(2.85) has been determined by solution calorimetry combining solution enthalpies of BaCe(0.7)Nd(0.2)In(0.1)O(2.85), BaCl(2)+ 0.7CeCl(3) + 0.2NdCl(3) + 0.1InCl(3) mixture in 1 M HCl with Kl 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 BaCe(0.7)Nd(0.2)In(0.1)O(2.85) is thermodynamically favored than BaCe(0.8)Nd(0.2)O(2.9).
ISSN:0925-8388