INFLUENCE OF DIVISION STATE ON THE OXIDATION MECHANISM OF NIMN2O4

被引：10

作者：

GILLOT, B ^{[1
]}

KHARROUBI, M ^{[1
]}

METZ, R ^{[1
]}

ROUSSET, A ^{[1
]}

机构：

[1] CHIM MAT INORGAN LAB,CNRS,JE 5186,F-31055 TOULOUSE,FRANCE

来源：

MATERIALS CHEMISTRY AND PHYSICS | 1990年 / 26卷 / 3-4期

关键词：

D O I：

10.1016/0254-0584(90)90026-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present paper is concerned with the effect of preparation temperature of NiMn2O4 spinel on the oxidation mechanism. For NiMn2O4 prepared at 430-degrees-C (25 m2g-1 specific surface area), the oxidation proceeds through two steps showing single-phase cation deficient spinel for the first step of oxidation at low temperature with a kinetic controlled by a diffusion. During the second step this metastable spinel phase decomposes into NiMnO3 and alpha-Mn2O3 with sigmoidal kinetic curves. When NiMn2O4 is obtained by sintering at 1200-degrees-C and then ground (2 m2g-1 specific surface area), the increase of particle size causes the spinel phase to decompose directly according to the nucleation-growth mechanism.

引用

页码：395 / 404

页数：10

共 20 条

[1] CRYSTALLOGRAPHIC AND MAGNETIC STUDIES OF THE SYSTEM (NIFE2O4)1-X+(NIMN2O4)X [J].

BALTZER, PK ;

WHITE, JG .

JOURNAL OF APPLIED PHYSICS, 1958, 29 (03) :445-447

[2]

BOUCHER B, 1971, J PHYS CHEM SOLIDS, V31, P363

[3] ELECTRICAL-CONDUCTIVITY AND CATION VALENCIES IN NICKEL MANGANITE [J].

BRABERS, VAM ;

TERHELL, JCJM .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1982, 69 (01) :325-332

[4] STUDY OF PHYSICOCHEMICAL BEHAVIOR AND ELECTROCHEMICAL REACTIVITY OF NICKEL MANGANESE SPINEL OXIDES AND THEIR POSSIBLE INTERRELATION [J].

BRENET, JP ;

MEHROTRA, AK ;

TRAORE, K .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1975, 65 (01) :245-261

[5]

CAFFIN JP, 1987, HIGH TECH CERAMICS, P1743

[6] OXIDATION MECHANISM OF MANGANESE-SUBSTITUTED MAGNETITE [J].

GILLOT, B ;

ELGUENDOUZI, M ;

TAILHADES, P ;

ROUSSET, A .

REACTIVITY OF SOLIDS, 1986, 1 (02) :139-152

[7] PHASE TRANSFORMATION-RELATED KINETIC IN THE OXIDATION OF A MANGANESE MIXED-OXIDE WITH A SPINEL STRUCTURE [J].

GILLOT, B ;

ELGUENDOUZI, M ;

KHARROUBI, M ;

TAILHADES, P ;

METZ, R ;

ROUSSET, A .

MATERIALS CHEMISTRY AND PHYSICS, 1989, 24 (1-2) :199-208

[8] ELECTRICAL-CONDUCTIVITY STUDY OF OXIDATION PROCESS IN MANGANESE-SUBSTITUTED MAGNETITES [J].

GILLOT, B ;

ELGUENDOUZI, M ;

ROUSSET, A ;

TAILHADES, P .

JOURNAL OF MATERIALS SCIENCE, 1986, 21 (08) :2926-2932

[9]

HATA T, 1982, 28 MATS EL IND CO NA, P1123

[10]

JABRY E, 1986, J PHYS-PARIS, V47, P843, DOI 10.1051/jphyscol:19861129

← 1 2 →