Heat capacity and thermodynamic functions of new cobalt manganites NdM2I CoMnO5 (MI = Li, Na, and K) in the range of 298.15–673 K
- Авторы: Kasenov B.K.1, Turtubaeva M.O.2, Amerkhanova S.K.2, Nikolov R.N.3, Kasenova S.B.1, Sagintaeva Z.I.1
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Учреждения:
- Abishev Chemical–Metallurgical Institute
- Buketov Karaganda State University
- Chemical Technological Metallurgical University
- Выпуск: Том 91, № 2 (2017)
- Страницы: 282-286
- Раздел: Chemical Thermodynamics and Thermochemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/169256
- DOI: https://doi.org/10.1134/S0036024417020157
- ID: 169256
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Аннотация
Temperature dependences of the heat capacity of cobalt manganites NdM2I CoMnO5 (MI = Li, Na, and K) are studied by means of dynamic calorimetry in the range of 298.15−673 K. It is found that λ-shaped effects are observed on the Cp° ~ f (T) curve of cobalt manganites, due probably to second order phase transitions. Based on the experimental data, equations for the temperature dependences of the heat capacity of cobalt manganite are derived with allowance for the temperatures of phase transitions. The values of thermodynamic functions Н°(T)–Н°(298.15), S°(T), and Фхх(T) are calculated.
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B. Kasenov
Abishev Chemical–Metallurgical Institute
Автор, ответственный за переписку.
Email: kasenov1946@mail.ru
Казахстан, Karaganda, 100009
M. Turtubaeva
Buketov Karaganda State University
Email: kasenov1946@mail.ru
Казахстан, Karaganda, 100028
Sh. Amerkhanova
Buketov Karaganda State University
Email: kasenov1946@mail.ru
Казахстан, Karaganda, 100028
R. Nikolov
Chemical Technological Metallurgical University
Email: kasenov1946@mail.ru
Болгария, Sofia, 1756
Sh. Kasenova
Abishev Chemical–Metallurgical Institute
Email: kasenov1946@mail.ru
Казахстан, Karaganda, 100009
Zh. Sagintaeva
Abishev Chemical–Metallurgical Institute
Email: kasenov1946@mail.ru
Казахстан, Karaganda, 100009
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