Heat capacity and thermodynamic functions of nanostructured manganese ferrites of composition NdMe1.5MnFeO6 (Me = Mg, Ca, Sr, and Ba) in the temperature range from 298.15 to 673 K

被引：3

作者：

Kasenova, Sh B. ^{[1
]}

Sagintaeva, Zh I. ^{[1
]}

Kasenov, B. K. ^{[1
]}

Ermagambet, B. T. ^{[2
]}

Seisenova, A. A. ^{[1
]}

Kuanyshbekov, E. E. ^{[1
]}

Sherembaeva, R. T. ^{[3
]}

机构：

[1] Abishev Inst Chem Met, Karaganda 100009, Kazakhstan

[2] Inst Coal Chem & Technol, Astana 010000, Kazakhstan

[3] Karaganda State Tech Univ, Karaganda 470075, Kazakhstan

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2015年 / 89卷 / 04期

关键词：

manganese ferrite; heat capacity; thermodynamic functions;

D O I：

10.1134/S0036024415040123

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The isobaric heat capacities of nanostructured manganese ferrites NdMe1.5MnFeO6, where Me is Mg, Ca, Sr, and Ba, are investigated at Delta T ranging from 298.15 to 673 K by means of dynamic calorimetry. It is established that all of the investigated compounds exhibit lambda-shape anomalies on dependence graphs C (p) A degrees similar to (T) that could be due to second-order phase transitions. Dependence equations C (p) A degrees similar to(T) are derived with allowance for the temperatures of phase transitions and the temperature dependences of their thermodynamic functions SA degrees(T), HA degrees(T) - HA degrees(298.15), and I broken vertical bar (xx) (T) are calculated for the temperature range of 298.15 to 675 K.

引用

页码：586 / 591

页数：6

共 9 条

[1]

[Anonymous], 1986, Technical Description and Operating Instructions of the IT-S-400

[2]

Gusev A. N., 2007, METHODS PRODUCTION N

[3] Synthesis and x-ray diffraction study of new nanostructured manganite ferrites NdM 1.5 II MnFeO6 (MII = Mg, Ca, Sr, Ba) [J].

Kasenov, B. K. ;

Davrenbekov, S. Zh. ;

Mustafin, E. S. ;

Kasenova, Sh. B. ;

Sagintaeva, Zh. I. ;

Abil'daeva, A. Zh. ;

Ermagambet, B. T. ;

Bekturganov, Zh. S. .

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY, 2013, 58 (05) :570-573

[4]

Kasenova Sh. B, 2014, ZH FIZ KHIM, V88, P836, DOI 10.7868/s0044453714050112

[5]

Kumok V.N, 1987, DIRECT INVERSE PROBL, P108

[6]

Platunov E. S., 1986, THERMOPHYSICAL MEASU

[7]

Robie RichardA., 1978, THERMODYNAMIC PROPER

[8]

Smirnov I. A., 1991, ZH VSES KHIM OVA+, V36, P95

[9]

Spiridonov V. P., 1970, MATH PROCESSING PHYS

← 1 →