THERMAL-DECOMPOSITION OF IRON(III) OXALATE-MAGNESIUM OXALATE MIXTURES

被引：11

作者：

BASAHEL, SN

ELBELLIHI, AA

GABAL, M

DIEFALLAH, EHM

机构：

[1] KING ABDULAZIZ UNIV,FAC SCI,DEPT CHEM,JEDDAH,SAUDI ARABIA

[2] FAC SCI BENHA,DEPT CHEM,BENHA,EGYPT

来源：

THERMOCHIMICA ACTA | 1995年 / 256卷 / 02期

关键词：

DECOMPOSITION; DTA; IRON OXALATE; MAGNESIUM OXALATE; OXALATE; TG; XRD;

D O I：

10.1016/0040-6031(94)02158-K

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The differential thermal analysis-thermogravimetry (DTA-TG) behaviour of chemically coprecipitated iron(III) oxalate-magnesium oxalate (1: 1 mole ratio) was investigated. X-ray diffractometry (XRD) of samples calcined at different temperatures showed that magnesium ferrite is formed in samples heated at higher temperatures. Integral composite analyses of dynamic TG data of the decomposition reactions in the coprecipitated mixture were carried out using various solid state reaction model equations, and the results showed that the decomposition reactions are best described by the two- and three-phase boundary, R(2) and R(3) models. Kinetic analyses of dynamic data were also carried out in accordance with the integral methods of Ozawa and Coats-Redfern and the results are discussed in comparison with the integral composite analysis of data.

引用

页码：339 / 346

页数：8

共 20 条

[1] GAMMA-RADIATION EFFECTS ON THE REDUCTION OF HEMATITE TO IRON IN THE GRAPHITE-IRON(III) OXIDE SYSTEM [J].