Thermodynamic properties of titanium-manganite LaСаTiMnO6
By the method of dynamic calorimetry in the range of 298.15-673 K, the heat capacity of titanium-manganite LaСаTiMnO6, obtained by solid-phase interaction at 800-1200oC from lanthanum, titanium (II), manganese (III) and calcium carbonate oxides was studied. On the dependence curve Ср°~¦(T) in the s...
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| Format: | Article |
| Language: | English |
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Academician Ye.A. Buketov Karaganda University
2023-09-01
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| Series: | Қарағанды университетінің хабаршысы. Физика сериясы |
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| Online Access: | https://phs.buketov.edu.kz/index.php/physics-vestnik/article/view/542 |
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| author | B.K. Kasenov Sh.B. Kasenova Zh.I. Sagintayeva C.O. Baisanov N.Yu. Lu Zh.S. Bekturganov A.K. Zeinidenov E.E. Kuanyshbekov |
| author_facet | B.K. Kasenov Sh.B. Kasenova Zh.I. Sagintayeva C.O. Baisanov N.Yu. Lu Zh.S. Bekturganov A.K. Zeinidenov E.E. Kuanyshbekov |
| author_sort | B.K. Kasenov |
| collection | DOAJ |
| description |
By the method of dynamic calorimetry in the range of 298.15-673 K, the heat capacity of titanium-manganite LaСаTiMnO6, obtained by solid-phase interaction at 800-1200oC from lanthanum, titanium (II), manganese (III) and calcium carbonate oxides was studied. On the dependence curve Ср°~¦(T) in the specified temperature range, a λ-shaped effect was detected at 598 K, probably related to the phase transition of the second kind. A fundamental constant is determined — the standard heat capacity of LaСаTiMnO6, equal to 221±14 J /(mol×K). Its standard entropy, equal to 206±6 J/(mol×K), was estimated by the approximate method of ion increments. Based on experimental data, taking into account the temperature of the phase transition, the equations describing the temperature dependences of Ср°~¦(T) and the thermodynamic functions So (T), Ho (T) — Ho (298.15) and Фхх(Т) of the investigated titanium-manganite lanthanum and calcium are calculated. The standard heat capacity of LaСаTiMnO6 is also calculated using the Debye method, the value of which is in good agreement with experimental data. According to the developed methodology, the standard enthalpy of titanium-manganite formation was calculated, equal to — 3867.5 kJ/mol.
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| format | Article |
| id | doaj-art-07d391645eb741b28cc17b8bbbf2e079 |
| institution | OA Journals |
| issn | 2518-7198 2663-5089 |
| language | English |
| publishDate | 2023-09-01 |
| publisher | Academician Ye.A. Buketov Karaganda University |
| record_format | Article |
| series | Қарағанды университетінің хабаршысы. Физика сериясы |
| spelling | doaj-art-07d391645eb741b28cc17b8bbbf2e0792025-08-20T02:13:06ZengAcademician Ye.A. Buketov Karaganda UniversityҚарағанды университетінің хабаршысы. Физика сериясы2518-71982663-50892023-09-01111310.31489/2023ph3/171-177Thermodynamic properties of titanium-manganite LaСаTiMnO6B.K. KasenovSh.B. KasenovaZh.I. SagintayevaC.O. BaisanovN.Yu. LuZh.S. BekturganovA.K. ZeinidenovE.E. Kuanyshbekov By the method of dynamic calorimetry in the range of 298.15-673 K, the heat capacity of titanium-manganite LaСаTiMnO6, obtained by solid-phase interaction at 800-1200oC from lanthanum, titanium (II), manganese (III) and calcium carbonate oxides was studied. On the dependence curve Ср°~¦(T) in the specified temperature range, a λ-shaped effect was detected at 598 K, probably related to the phase transition of the second kind. A fundamental constant is determined — the standard heat capacity of LaСаTiMnO6, equal to 221±14 J /(mol×K). Its standard entropy, equal to 206±6 J/(mol×K), was estimated by the approximate method of ion increments. Based on experimental data, taking into account the temperature of the phase transition, the equations describing the temperature dependences of Ср°~¦(T) and the thermodynamic functions So (T), Ho (T) — Ho (298.15) and Фхх(Т) of the investigated titanium-manganite lanthanum and calcium are calculated. The standard heat capacity of LaСаTiMnO6 is also calculated using the Debye method, the value of which is in good agreement with experimental data. According to the developed methodology, the standard enthalpy of titanium-manganite formation was calculated, equal to — 3867.5 kJ/mol. https://phs.buketov.edu.kz/index.php/physics-vestnik/article/view/542Titanium-manganitelanthanumcalciumheat capacityphase transitionenthalpy of formation |
| spellingShingle | B.K. Kasenov Sh.B. Kasenova Zh.I. Sagintayeva C.O. Baisanov N.Yu. Lu Zh.S. Bekturganov A.K. Zeinidenov E.E. Kuanyshbekov Thermodynamic properties of titanium-manganite LaСаTiMnO6 Қарағанды университетінің хабаршысы. Физика сериясы Titanium-manganite lanthanum calcium heat capacity phase transition enthalpy of formation |
| title | Thermodynamic properties of titanium-manganite LaСаTiMnO6 |
| title_full | Thermodynamic properties of titanium-manganite LaСаTiMnO6 |
| title_fullStr | Thermodynamic properties of titanium-manganite LaСаTiMnO6 |
| title_full_unstemmed | Thermodynamic properties of titanium-manganite LaСаTiMnO6 |
| title_short | Thermodynamic properties of titanium-manganite LaСаTiMnO6 |
| title_sort | thermodynamic properties of titanium manganite laсаtimno6 |
| topic | Titanium-manganite lanthanum calcium heat capacity phase transition enthalpy of formation |
| url | https://phs.buketov.edu.kz/index.php/physics-vestnik/article/view/542 |
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