Thermodynamic study of ferrites (LaM3Fe5O12)-Fe-II (M-II - Mg, Ca, Sr)

被引：0
|
作者：
Musstafin, E. S. [1 ]
Kasenov, R. Z. [1 ]
Pudov, A. M. [1 ]
Blyalev, S. A. [1 ]
Kaikenov, D. A. [1 ]
Muratbekova, A. A. [1 ]
机构：
[1] EA Buketov Karaganda State Univ, Karaganda, Kazakhstan
来源：
BULLETIN OF THE UNIVERSITY OF KARAGANDA-CHEMISTRY | 2014年 / 75期
关键词：
heat capacity; temperature dependence of the heat capacity; phase transitions; ferrites; perovskite;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
New ferrites (LaM3Fe5O12)-Fe-II (M-II - Mg, Ca, Sr) were obtained by high-temperature synthesis on ceramic technology. By powder X-ray diffraction established that compounds crystallize in the tetragonal singonia, the parameters of its crystal lattices are determined. The heat capacity of ferrites has been defined by dynamic calorimetric method at 298.15-673 K and detected the presence of phase transitions of type II. The equations describing the dependence in the range 298.15-673 K are derived taking into account the phase transitions.
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页码：21 / 25
页数：5
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