Journal Published Online: 13 March 2019
Volume 8, Issue 1

Structural Study and Electrical Properties of Bi Ca Sb CuO Pyrochlore-Type Solid Solution Series

CODEN: MPCACD

Abstract

Pyrochlore solid solution Bi1.5xCaxSb1.5CuO7 has been prepared by conventional ceramic solid state reaction with 0 ≤ x ≤ 0.4. The samples were characterized by X-ray powder diffraction (XRPD), scanning electron microscopy, and electrical conductivity measurements. The pyrochlore single phase formation was confirmed for all of the x-fractions. The variation of the electrical resistivity versus x of all samples measured by means of a four-probe device at room temperature indicates that these still remain insulators. High-temperature electrical conductivity measurements at various frequencies using a device with two electrodes allow us to note the maximum electrical conductivity of 4.7 × 10−3 S.cm−1, which has been reached at x = 0.2, generating an activation energy of 0.14 eV. For this fraction, Rietveld refinement of the corresponding XRPD pattern confirmed the typical cubic Fd-3m space group with a cell parameter of a = 10.4089(1) Å.

Author Information

Dra, Rafik El Arslene
Laboratoire de Chimie des Matériaux Inorganiques et Applications, Université des Sciences et de la Technologie d’Oran, Faculté de Chimie, Département chimie physique, Oran El-Mnaouer, Algeria
Bekka, Ahmed
Laboratoire de Chimie des Matériaux Inorganiques et Applications, Université des Sciences et de la Technologie d’Oran, Faculté de Chimie, Département chimie physique, Oran El-Mnaouer, Algeria
Dinnebier, Robert E.
Max Planck Institute for Solid State Research, Heisenbergstrasse 1, Stuttgart, Germany
Boukerma, Bounekref
Institut Algérien du Pétrole, Oran (Arzew), Algeria
Pages: 12
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Stock #: MPC20180057
ISSN: 2379-1365
DOI: 10.1520/MPC20180057