Combustion synthesis and properties of fine particle spinel manganites

Journal Article · Mon Feb 01 00:00:00 EST 1993 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1006/jssc.1993.1056· OSTI ID:6481822

Arul Dhas, N; Patil, K C ^[1]

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1. Indian Inst. of Science, Bangalore (India)

Fine particle spinel manganites have been prepared by thermal decomposition of the precursors N[sub 2]H[sub 5]M[sub 1/3]Mn[sub 2/3](N[sub 2]H[sub 3]COO)[sub 3][center dot]H[sub 2]O (M = Co and Ni) and M[sub 1/3]Mn[sub 2/3](N[sub 2]H[sub 3]COO)[sub 2][center dot]2H[sub 2]O (M = Mg and Zn), as well as by the combustion of redox mixtures containing M(II) nitrate (M = Mg, Co, Ni, Cu, and Zn), Mn(II) nitrate, and maleic hydrazide (MH) in the required molar ratio. Both the precursor and redox mixtures undergo self-propagating, gas-producing, exothermic reactions once ignited at 250-375[degrees]C to yield corresponding manganites in less than 5 min. Formation of single phase products was confirmed by X-ray powder diffraction patterns. The manganites are of submicrometer size and have surface area in the range 20-76 m[sup 2]/g. 25 refs., 3 figs., 3 tabs.

• OSTI ID: 6481822
• Journal Information: Journal of Solid State Chemistry; (United States), Vol. 102:2; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COBALT OXIDES
CHEMICAL PREPARATION
COPPER OXIDES
MAGNESIUM OXIDES
MANGANESE OXIDES
NICKEL OXIDES
ZINC OXIDES
COMBUSTION
PARTICLES
PYROLYSIS
SURFACE AREA
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT COMPOUNDS
COHERENT SCATTERING
COPPER COMPOUNDS
DECOMPOSITION
DIFFRACTION
MAGNESIUM COMPOUNDS
MANGANESE COMPOUNDS
NICKEL COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
SCATTERING
SURFACE PROPERTIES
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
ZINC COMPOUNDS
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry