NDLI: Preparation and characterization of thermistors with negative temperature coefficient, NixMn3–xO4(1x0.56), from formate precursors

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Front cover

Contents pages

Structure of the mixed-valence lithium cuprate Li₃Cu₂O₄ by powder neutron diffraction

Structure of new perovskite-related compounds, LiCuM₃O₉(M = Nb, Ta)

Influence of oxygen pressure on the structure of reactively deposited indium oxide films

Effect of backbone flexibility and the position of the lateral group on the mesophase stability of laterally attached, side-chain polymers

Optical properties of cresyl violet–polymer composites for quantification of humidity and ammonia gas in ambient air

Crystal structure, magnetic susceptibility and electrical conductivity of the uranium silicide carbides U₃Si₂C₂ and U₂₀Si₁₆C₃

Unusual electromagnetic shielding characteristics of inherently conducting polymer-coated metal powder/polymer composites

Morphology of electrochemically prepared polyaniline. Influence of polymerization parameters

Preparation and characterization of thermistors with negative temperature coefficient, Ni_xMn_3–xO₄(1x0.56), from formate precursors

Comparative sintering study on non-conventional and commercial silicon nitride powders

Synthesis and characterization of pure and yttrium-containing alumina aerogels

Rapid analysis of occluded Pr₂NH in the AlPO₄-11 and VPI-5 molecular sieves by direct mass spectrometry

Spin–glass behaviour of the system CoFe_2–xGa_xO₄

Layered basic copper anion exchangers: chemical characterisation and X-ray absorption study

Structural refinement using high-resolution powder X-ray diffraction data of Ca_0.5Ti₂P₃O₁₂, a low-thermal-expansion material

Materials chemistry communications. Synthesis, X-ray structure and conductivity of a new molecular conductor derived from a platinum complex: (NHMe₃)[Pt(dmit)₂]₃·CH₃CN

Photoisomerization of indolinespirobenzopyran in layered double hydroxides

1,3,5-Tris[4-(diphenylamino)phenyl]benzene and its methyl-substituted derivatives as a novel class of amorphous molecular materials

Synthesis and characterization of Group 6 metal silicide–silicon carbide composites via solid-state displacement reactions of nanosize grains of M₂C and silicon

Photobactericidal materials based on porphyrins and phthalocyanines

Lithium intercalation of LiCuTa₃O₉ and its structural change

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Back matter

Journal of Materials Chemistry Vol - 3 Issue - 2

Preparation and characterization of thermistors with negative temperature coefficient, Ni_xMn_3–xO₄(1x0.56), from formate precursors

Content Provider	Royal Society of Chemistry (RSC)
Author	Sarrión, M. L. Martínez Sánchez, M. Morales
Copyright Year	1993
Abstract	Single-phase nickel manganite spinets, NixMn3–xO4 with 1x0.56, have been prepared by mild heating of solid solutions of nickel–manganese formate obtained by coprecipitation. A dilatometric and X-ray diffraction study was conducted at different temperatures, showing the different stages (788, 1033 and 1083 K) of the sintering process of highly densified nickel manganite ceramics (density, 96–98%). A granulometric and scanning electron microscopy (SEM) study showed that the oxide particles formed agglomerates of 2 µm, with a narrow size distribution. The oxide particles obtained in air were larger than those obtained in a controlled atmosphere.The resistivity showed a minimum of 1580 Ω cm and the sensitivity index was at ca. 4000 K. This value corresponds to x= 0.72; this implies that the nickel is almost entirely in octahedral holes. This minimum is independent of the oxide synthesis process.
Starting Page	273
Ending Page	277
Page Count	5
File Format	PDF
ISSN	09599428
Volume Number	3
Issue Number	3
Journal	Journal of Materials Chemistry
DOI	10.1039/JM9930300273
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Nickel Manganite Formic acid Coprecipitation X-ray crystallography Sintering Scanning electron microscope Micrometre Electrical resistivity and conductivity
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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Preparation and characterization of thermistors with negative temperature coefficient, Ni_xMn_3–xO₄(1x0.56), from formate precursors

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