Anzeige
Erschienen in:
01.07.2007
Preparation and electrical properties of sintered oxides composed of Mn1.5Co(0.25+X)Ni(1.25-X)O4 ( \(0 \leqq X \leqq 0.75\)) with a cubic spinel structure
Erschienen in: Journal of Materials Science | Ausgabe 14/2007
EinloggenAktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
Monophase cubic spinel-type oxides of Mn1.5Co(0.25+X)Ni(1.25-X)O4 (
\(0 \leqq X \leqq 1\)) were prepared through the oxidation of specimens sintered at 1400 °C. The oxides with \( 0 \leqq X \leqq 0.75 \) composition are focused on in this study, as the oxides with \( 0.75 < X \leqq 1 \) composition did not convert into a monophase cubic spinel structure. The electrical conductivity of the sintered bodies was confirmed to increase exponentially with increasing temperature. In the composition range of \(0 \leqq X \leqq 0.75\), both the electrical conductivity and the Seebeck coefficient increased with increasing X. The oxides with composition between \(0 \leqq X < 0.57\) were n-type semiconductors, whereas those with \( 0.57 < X \leqq 0.75 \) were p-type. It was concluded that electrical conduction in the specimens is controlled by small polaron hopping.