Synthesis and characterization of nonstoichiometric nickel manganite spinels NixMn3-x square(3 delta/4) O-4+delta

被引：52

作者：

Laberty, C ^{[1
]}

Alphonse, P ^{[1
]}

Demai, JJ ^{[1
]}

Sarda, C ^{[1
]}

Rousset, A ^{[1
]}

机构：

[1] UNIV TOULOUSE 3,LAB CHIM MAT INORGAN,F-31062 TOULOUSE,FRANCE

来源：

MATERIALS RESEARCH BULLETIN | 1997年 / 32卷 / 02期

关键词：

oxides; chemical synthesis; electron diffraction; thermogravimetric analysis; defects;

D O I：

10.1016/S0025-5408(96)00180-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nickel manganites have been prepared by thermal decomposition of mixed oxalates Nix/3Mn(3-x/3)C2O4 . nH(2)O in air at 623 K (0 less than or equal to x less than or equal to 1). These oxides are finely divided materials because their BET specific surface areas are close to 100 m(2)/g and the average diameter of their crystallites is about 10 nm. Electron diffraction studies of these compounds show that they crystallize in a spinel-like cubic structure. Thermogravimetric analyses show that these oxides are nonstoichiometric cation deficient spinels Ni(x)Mn(3-x)square(3 delta/4)O(4+delta). delta depends on nickel content and reaches a maximum of 0.9 for x = 0.4. Copyright (C) 1997 Elsevier Science Ltd.

引用

页码：249 / 261

页数：13

共 10 条

[1]

DEYRIEUX R, 1971, THEIS MARSEILLE

[2] REDOX REACTIONS IN CONDENSED OXIDE SYSTEMS .10. FORMATION OF DEFECT SPINELS AND PHASE-RELATIONS IN THE SYSTEM NIXMN3-XO4 [J].

FELTZ, A ;

TOPFER, J .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1989, 576 (09) :71-80

[3] IONIC CONFIGURATION AND CATION DISTRIBUTION IN CUBIC NICKEL MANGANITE SPINELS NIXMN3-XO4(0.57-LESS-THAN-X-LESS-THAN-1) IN RELATION WITH THERMAL HISTORIES [J].

GILLOT, B ;

BAUDOUR, JL ;

BOUREE, F ;

METZ, R ;

LEGROS, R ;

ROUSSET, A .

SOLID STATE IONICS, 1992, 58 (1-2) :155-161

[4] THEORY OF IONIC ORDERING, CRYSTAL DISTORTION, AND MAGNETIC EXCHANGE DUE TO COVALENT FORCES IN SPINELS [J].

GOODENOUGH, JB ;

LOEB, AL .

PHYSICAL REVIEW, 1955, 98 (02) :391-408

[5]

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

[6]

LAGIER JP, 1970, THESIS PARIS

[7] PREPARATION, SEMICONDUCTION AND LOW-TEMPERATURE MAGNETIZATION OF SYSTEM NI1-XMN2+XO4 [J].

LARSON, EG ;

ARNOTT, RJ ;

WICKHAM, DG .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1962, 23 (DEC) :1771-+

[8]

PASCAL P, 1960, NOUVEAU TRAITE CHIMI, V16, P794

[9] NIMN2O4 REVISITED [J].

TANG, XX ;

MANTHIRAM, A ;

GOODENOUGH, JB .

JOURNAL OF THE LESS-COMMON METALS, 1989, 156 :357-368

[10] THERMAL-DECOMPOSITION OF MIXED-CRYSTALS NIXMN3-X(C2O4)3.6H2O [J].

TOPFER, J ;

JUNG, J .

THERMOCHIMICA ACTA, 1992, 202 :281-289

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