| Numéro |
J. Phys. IV France
Volume 03, Numéro C7, Novembre 1993
The 3rd European Conference on Advanced Materials and ProcessesTroisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés |
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|---|---|---|
| Page(s) | C7-1429 - C7-1434 | |
| DOI | https://doi.org/10.1051/jp4:19937221 | |
The 3rd European Conference on Advanced Materials and Processes
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-1429-C7-1434
DOI: 10.1051/jp4:19937221
Research Centre Jülich, Institute for Reactor Materials, P.O. Box 1913, 5170 Jülich, Germany
© EDP Sciences 1993
Troisiéme Conférence Européenne sur les Matériaux et les Procédés Avancés
J. Phys. IV France 03 (1993) C7-1429-C7-1434
DOI: 10.1051/jp4:19937221
Structural and high temperature electrical properties of Lay-xSrxMnO3 perovskite materials
E. SYSKAKIS, B. ROBENS and A. NAOUMIDISResearch Centre Jülich, Institute for Reactor Materials, P.O. Box 1913, 5170 Jülich, Germany
Abstract
The phase constitution of Lay-xSrxMnO3 perovskite materials with [MATH] and [MATH] prepared by wet chemical techniques has been determined. Single phase La-deficient materials have been obtained at y=0.95 and [MATH] as well as for [MATH] and [MATH]. The observed variation of the lattice parameters leads to shrinking unit cell volume with Sr-content and with La-deficiency. Small polaron conduction has been observed for [MATH], while for [MATH] metallic-like behaviour is observed for La-deficient materials. The electrical conductivity of Sr-free materials at 950 °C approaches 100 S/cm. The activation energy for conduction changes strongly with sintering temperature and composition of the specimen.
© EDP Sciences 1993