CobaltMaghrebV1, France, Analysis, bibRecord, 000019

Structure, sintering and electrical properties of new ionic conductor Ag4Co7(AsO4)6

Identifieur interne : 000019 ( France/Analysis ); précédent : 000018; suivant : 000020

Structure, sintering and electrical properties of new ionic conductor Ag4Co7(AsO4)6

Auteurs : R. Marzouki [Tunisie] ; Abderrahmen Guesmi [Tunisie] ; S. Georges [France] ; M. F. Zid [Tunisie] ; A. Driss [Tunisie]

Source :

Journal of alloys and compounds [ 0925-8388 ] ; 2014.

RBID : Pascal:14-0159434

Descripteurs français

Pascal (Inist)
- Frittage, Conductivité ionique, Réaction état solide, Diffraction RX, Effet tunnel, Broyeur boulet, Dimension particule, Microstructure, Energie activation, Argent Cobalt Arséniate Mixte, Conducteur ionique.

English descriptors

KwdEn :
- Activation energy, Ball mill, Ionic conductivity, Ionic conductors, Microstructure, Particle size, Silver Cobalt Arsenates Mixed, Sintering, Solid state reaction, Tunnel effect, XRD.

Abstract

A new silver-cobalt arsenate, Ag₄Co₇(AsO₄)₆, is synthesized by solid state reaction method and characterized by X-ray diffraction and impedance spectroscopy. The phase crystallizes in the monoclinic space group C2/m with a = 10.755(2) Å, b = 14.937(2) Å, c = 6.731(2) Å, and β = 106.17(3)°. The structure is described as a three-dimensional anionic framework having interconnecting tunnels running along [100] and [010]. The former contains the silver cations. Ball milling is used as mechanical means to reduce the particles sizes of the as synthesized powder. At the optimal sintering temperature of 1173 K, dense ceramics (96% of the relative density) are obtained. Their microstructure is characterized by scanning electron microscopy. The conductivity of the ceramics is studied at different relative densities over a temperature interval from 437 to 773 K. The high conductivity at 210 °C (3.3 × 10^-5 S cm^-1) and the activation energy (Ea = 0.45 eV) show that Ag₄Co₇(AsO₄)₆ is a fast ionic conductor.

Affiliations:

Links toward previous steps (curation, corpus...)

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to stream PascalFrancis, to step Curation: 000286
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to stream Main, to step Merge: 000188
to stream Main, to step Curation: 000188
to stream Main, to step Exploration: 000188
to stream France, to step Extraction: 000019

Links to Exploration step

Pascal:14-0159434

Le document en format XML

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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Structure, sintering and electrical properties of new ionic conductor Ag<sub>4</sub>
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<series><title level="j" type="main">Journal of alloys and compounds</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term>
<term>Ball mill</term>
<term>Ionic conductivity</term>
<term>Ionic conductors</term>
<term>Microstructure</term>
<term>Particle size</term>
<term>Silver Cobalt Arsenates Mixed</term>
<term>Sintering</term>
<term>Solid state reaction</term>
<term>Tunnel effect</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Frittage</term>
<term>Conductivité ionique</term>
<term>Réaction état solide</term>
<term>Diffraction RX</term>
<term>Effet tunnel</term>
<term>Broyeur boulet</term>
<term>Dimension particule</term>
<term>Microstructure</term>
<term>Energie activation</term>
<term>Argent Cobalt Arséniate Mixte</term>
<term>Conducteur ionique</term>
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<front><div type="abstract" xml:lang="en">A new silver-cobalt arsenate, Ag<sub>4</sub>
Co<sub>7</sub>
(AsO<sub>4</sub>
)<sub>6</sub>
, is synthesized by solid state reaction method and characterized by X-ray diffraction and impedance spectroscopy. The phase crystallizes in the monoclinic space group C2/m with a = 10.755(2) Å, b = 14.937(2) Å, c = 6.731(2) Å, and β = 106.17(3)°. The structure is described as a three-dimensional anionic framework having interconnecting tunnels running along [100] and [010]. The former contains the silver cations. Ball milling is used as mechanical means to reduce the particles sizes of the as synthesized powder. At the optimal sintering temperature of 1173 K, dense ceramics (96% of the relative density) are obtained. Their microstructure is characterized by scanning electron microscopy. The conductivity of the ceramics is studied at different relative densities over a temperature interval from 437 to 773 K. The high conductivity at 210 °C (3.3 × 10<sup>-5</sup>
 S cm<sup>-1</sup>
) and the activation energy (Ea = 0.45 eV) show that Ag<sub>4</sub>
Co<sub>7</sub>
(AsO<sub>4</sub>
)<sub>6</sub>
 is a fast ionic conductor.</div>
</front>
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<name sortKey="Driss, A" sort="Driss, A" uniqKey="Driss A" first="A." last="Driss">A. Driss</name>
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Structure, sintering and electrical properties of new ionic conductor Ag4Co7(AsO4)6

Structure, sintering and electrical properties of new ionic conductor Ag4Co7(AsO4)6

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri