INVESTIGATION ON THE FORMATION OF MANGANESE ZINC FERRITES BY THERMAL-DECOMPOSITION OF SOLID-SOLUTION OXALATES

被引：33

作者：

BREMER, M ^{[1
]}

FISCHER, S ^{[1
]}

LANGBEIN, H ^{[1
]}

TOPELMANN, W ^{[1
]}

SCHELER, H ^{[1
]}

机构：

[1] DRESDEN UNIV TECHNOL,INST INORGAN CHEM,DRESDEN,GERMANY

来源：

THERMOCHIMICA ACTA | 1992年 / 209卷

关键词：

D O I：

10.1016/0040-6031(92)80210-N

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Homogeneous solid solution oxalates of Mn(II), Zn(II) and Fe(II) were prepared by coprecipitation from metal acetate solution with oxalic acid, with the partial replacement of water by acetone as solvent. During the thermal decomposition of solid solution oxalates in a nitrogen atmosphere (10 ppm O2) the oxygen partial pressure is considerably lowered by the mixture of CO-CO2 produced. Under this condition a single phase ferrite of spinel structure is formed by thermal decomposition in the range 400-600-degrees-C with a short annealing time of 3 h. With annealing for a longer time in a nitrogen atmosphere (10 ppm O2), alpha-Fe2O3 is formed as well as the spinel according to an extrapolated p(O2)-theta diagram for manganese ferrite.

引用

页码：323 / 330

页数：8

共 14 条

[1]

BARIN I, 1977, THERMOCHEMICAL PRO S

[2] INFLUENCE OF OXYGEN-PRESSURE ON OXIDATION REDUCTION PHENOMENA OBSERVED WITH SUBMICROMETER-SIZED MANGANESE-SUBSTITUTED MAGNETITES [J].

GILLOT, B ;

ELGUENDOUZI, M .

THERMOCHIMICA ACTA, 1990, 162 (02) :265-275

[3]

GRISEDSKI WW, 1987, ZH NEORG KHIM, V32, P2785

[4] AN EFFECT OF OXYGEN-PRESSURE ON THE PROCESS OF MONOCRYSTALLIZATION OF THE MNAZNBFE2O4 MANGANESE-ZINC FERRITES [J].

GUZIK, E ;

FITZNER, K .

CRYSTAL RESEARCH AND TECHNOLOGY, 1988, 23 (07) :863-870

[5]

Hausner H., 1978, Berichte der Deutschen Keramischen Gesellschaft, V55, P194

[6]

Inzenhofer A., 1975, SPRECHSAAL, V108, P484

[7]

KLEINERT P, 1961, Z CHEM, V5, P83

[8] INVESTIGATION OF THE FORMATION OF NICKEL ZINC FERRITE FROM COPRECIPITATED OXALATES [J].

LANGBEIN, H ;

FISCHER, S .

THERMOCHIMICA ACTA, 1991, 182 (01) :39-46

[9]

LUPE JJ, 1989, NACHSCHLAGEWERK ANAL

[10]

Michalk C., 1987, Hermsdorfer Technische Mitteilungen, V27, P2253

← 1 2 →