Heat capacity on data of DSC calorimetry and thermodynamic functions of barium cerate doped by holmium and indium oxides in the temperature range of 200–700 K
| Autor: | Peter Adelmann, E. N. Tkachev, Th. Wolf, D. A. Samoshkin, Nata I. Matskevich, M. Le Tacon, S. V. Stankus |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Enthalpy chemistry.chemical_element Thermodynamics Barium 02 engineering and technology Calorimetry Atmospheric temperature range 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Heat capacity 010406 physical chemistry 0104 chemical sciences Differential scanning calorimetry chemistry Physical and Theoretical Chemistry 0210 nano-technology Holmium Indium |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 130:1125-1131 |
| ISSN: | 1588-2926 1388-6150 |
| Popis: | For the first time the heat capacity of BaCe0.7Ho0.2In0.1O2.85 was measured in the temperature range of 200–700 K. Calorimetric experiments were performed using differential scanning calorimetry (DSC). We identified three areas where heat capacity was smoothly varying: 200–500, 500–573, and 573–700 K. The heat capacity in all these areas has been described by polynomials. Heat capacity of BaCe0.7In0.1Ho0.2O2.85 in the temperature range 200–500 K is well described by a polynomial: C p,m ° = 55.606 + 0.23556 T − 1.9546 × 10−4 T 2 − 1.2072 × 10−8 T 3. The heat capacity in the range of 500–573 K is well described by a polynomial of the form: C p,m ° = 429.55 − 0.66985 T + 4.0801 × 10−4 T 2 − 1.8387 × 107/T2. The heat capacity in the temperature range 573–700 K is well described by the equation: C p,m ° = 135.72 − 0.060195 T + 6.7994 × 10−5 T 2. The enthalpy increments (H m ° (T) − H m ° (298.15)) and entropy (S m ° (T)) were evaluated from heat capacity data (T = 200–700 K). |
| Databáze: | OpenAIRE |
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