NickelMaghrebV1, Maroc, Analysis, bibRecord, 000233

Fundamental and technological aspects of the surface properties and reactivity of some metal oxides

Identifieur interne : 000233 ( Maroc/Analysis ); précédent : 000232; suivant : 000234

Fundamental and technological aspects of the surface properties and reactivity of some metal oxides

Auteurs : L.-C. Dufour [France] ; G. L. Bertrand [France] ; G. Caboche [France] ; P. Decorse [France] ; A. El Anssari [Maroc] ; A. Poirson [France] ; M. Vareille [France]

Source :

Solid State Ionics [ 0167-2738 ] ; 1997.

RBID : ISTEX:E3F85C11CF82BCA67A398471D2EACED558ABE99D

Descripteurs français

Pascal (Inist)
- 6835D, Addition chrome, Application, Article synthèse, Ba O Ti, BaTiO3, Baryum titanate, Composition chimique, Composé quaternaire, La Mn O Sr, La1-xSrxMnO3, Lanthane Manganite, Matériau dopé, NiO:Cr, Nickel oxyde, Rayon X, Réactivité, Réduction chimique, Spectrométrie photoélectron, Strontium Manganite, Surface, Ségrégation surface, Traitement surface.

English descriptors

KwdEn :
- Application, Barium titanates, Chemical composition, Chemical reduction, Chromium additions, Doped materials, Lanthanum Manganites, Nickel oxides, Photoelectron spectroscopy, Quaternary compounds, Reactivity, Reviews, Strontium Manganites, Surface segregation, Surface treatments, Surfaces, X radiation.

Abstract

As is usually accepted for many inorganic compounds, the surface properties often play a fundamental role in the overall properties of metal oxides, in particular when the oxide materials are used in the form of fine grains. One difficulty in characterizing these surface properties is to apply the results of studies performed on ideal surfaces to the actual materials in use. A way to accept this challenge can be to successively consider initial powders, polycrystalline pellets formed after thermal or mechanical treatment of these powders and, finally, monocrystalline surfaces prepared from these powders or pellets. This principle can be applied to the study of the surface properties and reactivity of various metal oxides either used as models or having a technological interest in catalysis, electronics or energetics: doped nickel oxide, barium titanate, lanthanum-strontium manganites, etc. Some selected examples of experimental results for three kinds of investigations are presented: (i) mechanism and kinetics of nucleation and growth of ultrathin, metallic films by surface reduction of NiO and influence of the chromium segregation on the surface reactivity of Cr2O3NiO solid solutions, (ii) effect of a high temperature treatment on the chemical surface composition of industrial BaTiO3 samples, (iii) compared properties of bulk and surface layers in lanthanum-strontium manganites as a function of strontium content and biography of the materials. These analyses were performed by electron spectroscopies and diffraction associated with electron microscopy and ultrathermogravimetry.

Url:

https://api.istex.fr/document/E3F85C11CF82BCA67A398471D2EACED558ABE99D/fulltext/pdf

DOI: 10.1016/S0167-2738(97)00176-8

Affiliations:

Links to Exploration step

ISTEX:E3F85C11CF82BCA67A398471D2EACED558ABE99D

Le document en format XML

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Serveur d'exploration sur le nickel au Maghreb

Fundamental and technological aspects of the surface properties and reactivity of some metal oxides

Fundamental and technological aspects of the surface properties and reactivity of some metal oxides

Source :

Descripteurs français

English descriptors

Abstract

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