Kasenova S.B.,Abishev Institute of Chemistry and Metallurgy |
Kasenov B.K.,Abishev Institute of Chemistry and Metallurgy |
Sagintaeva Zh.I.,Abishev Institute of Chemistry and Metallurgy |
Bekturganov N.S.,National Scientific and Technological Holding JSC Parasat |
And 4 more authors.
Russian Journal of Physical Chemistry A | Year: 2014
Heat capacities of nanostructured NdCa2CuMnO6 cuprate-manganite are measured by means of dynamic calorimetry on an IT-C-400 unit in the temperature interval of 298.15-673 K. It is established that a λ-shaped phase transition of the second kind is revealed at 348 K on the curve of the dependence C° p f(T) of NdCa2CuMnO 6. Equations for the temperature dependence of the heat capacity of NdCa2CuMnO6 cuprate-manganite are derived from experimental data including the temperature of phase transition. Thermodynamic functions H°(T)-H°(298.15), S°(T), and Φ(T) are calculated in the interval of 298.15-675 K. © 2014 Pleiades Publishing, Ltd. Source