Calorimetric investigation of heat capacity of the ErMFe2O5.5 (M = Mg, Ca, Sr, Ba) ferrites in the temperature range of 298.15-73 K and calculation of their thermodynamic functions

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• 作者：B. K. Kasenov ; Zh. I. Sagintaeva ; Sh. B. Kasenova ; E. E. Kuanyshbekov…
• 刊名：High Temperature
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：53
• 期：3
• 页码：358-362
• 全文大小：181 KB
• 参考文献：1.Chikazumi, S., Physics of Ferromagnetism, Tokyo: Syokabo, 1980.<br>2.Kasenov, B.K., Mustafin, E.S., Akubaeva, M.A., Edil’baeva, S.T., Sergazina, S.M., Erkasov, R.Sh., and Zhumadilov, E.K., Russ. J. Inorg. Chem., 2010, vol. 55, no. 3, p. 438.View Article <br>3.Platunov, E.S., Buravoi, S.E., Kurepin, V.V., and Petrov, G.S., Teplofizicheskie izmereniya i pribory (Thermal and Physical Measurements and Devices), Leningrad: Mashinostroenie, 1986.<br>4. Tekhnicheskoe opisanie i instruktsii po ekspluatatsii IT-S-400 (Technical Description and Operating Instructions for IT-400) Aktyubinsk: Etalon, 1986.<br>5.Kasenov, B.K., Davrenbekov, S.Zh., Kasenova, Sh.B., Sagintaeva, Zh.I., Abildaeva, A.Zh., Ermagambet, B.T., Isabaeva, M.A., Turtubaeva, M.O., and Zhumadilov, E.Zh., High Temp., 2012, vol. 50, no. 6, p. 736.View Article <br>6.Robie, R.A., Hewingway, B.S., and Fisher, J.K., Thermodynamic Properties of Minerals and Related Substances at 298.15 and (105 Pascals) Pressure and at Higher Temperatures, Washington: United States Government Printing Office, 1978.<br>7.Spiridonov, V.P. and Lopatkin, L.V., Matematicheskaya obrabotka eksperimental’nykh dannykh (Mathematical Treatment of Experimental Data), Moscow: Moscow State University, 1970.<br>8.Reznitskii, L.A., Khimicheskaya svyaz-i prevrashcheniya oksidov (Chemical Bonding and Transformations of Oxides), Moscow: Moscow State University, 1991.<br>9.Sagintaeva, Zh.I., Akisheva, Zh.N., Kasenova, Sh.B., Tolokonnikov, E.G., Mustafin, E.S., and Kasenov, B.K., High Temp., 2004, vol. 42, no. 3, p. 409.View Article <br>10.Kasenov, B.K., Mustafin, E.S., Kasenova, Sh.B., Edil’baeva, S.T., and Tolokonnikov, E.G., Russ. J. Inorg. Chem., 2004, vol. 49, no. 1, p. 102.<br>11.Tolokonnikov, E.G., Mustafin, E.S., Kasenova, Sh.B., Kasenov, B.K., Sagintaeva, Zh.I., Zhumadilov, E.K., and Akubaeva, M.A., Russ. J. Inorg. Chem., 2005, vol. 50, no. 2, p. 148.<br>12.Kasenov, B.K., Tolokonnikov, E.G., Mustafin, E.S., Kasenova, Sh.B., Davrenbekov, S.Zh., Sagintaeva, Zh.I., and Zhumadilov, E.K., Russ. J. Inorg. Chem., 2006, vol. 51, no. 3, p. 368.View Article <br>13.Kasenov, B.K., Mustafin, E.S., Akubaeva, M.A., Sagintaeva, Zh.I., Edil’baeva, S.T., Kasenova, Sh.B., Davrenbekov, S.Zh., and Zharkeshov, O.I., Russ. J. Inorg. Chem., 2008, vol. 53, no. 9, p. 1455.View Article <br>14.Kumok, V.N., in Pryamye i obratnye zadachi khimicheskoi termodinamiki (Direct and Inverse Problems of Chemical Thermodynamics), Novosibirsk: Nauka, 1987, p. 108.<br>
• 作者单位：B. K. Kasenov (1) <br> Zh. I. Sagintaeva (1) <br> Sh. B. Kasenova (1) <br> E. E. Kuanyshbekov (1) <br> A. A. Seisenova (1) <br><br>1. Abyshev Chemicometallurgical Institute, Karaganda, 100009, Republic of Kazakhstan <br>
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics<br>Atoms and Molecules in Strong Fields and Plasma Physics<br>Materials Science<br>Mechanics, Fluids and Thermodynamics<br>Physical Chemistry<br>Industrial Chemistry and Chemical Engineering<br>Russian Library of Science<br>
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3156

文摘

We present the data of the calorimetric investigations of the ErMFe2O5.5 (M = Mg, Ca, Sr, Ba) ferrites and calculation of their thermodynamic functions. As a result of calorimetric studies of the heat capacity, within the temperature range of 298.15-73 K, we discover, at the curves of the C p t f(T) dependence, the second kind λ-shaped phase transitions at the following temperatures: 373 K -ErMgFe2O5.5, 398 K -ErCaFe2O5.5; 423 K -ErBaFe2O5.5, 398 K -ErSrFe2O5.5. We derived the equations of the temperature dependence of the heat capacity for the ferrites with account for these phase transformations.