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Electrical Properties of Mn 3− x Co x O 4 (0 ≤ x ≤ 3) Ceramics: An Interesting System for Negative Temperature Coefficient Thermistors
Author(s) -
Rousset A.,
Tenailleau C.,
Dufour P.,
Bordeneuve H.,
Pasquet I.,
GuillemetFritsch S.,
Poulain V.,
Schuurman S.
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2011.02723.x
Subject(s) - spinel , electrical resistivity and conductivity , manganese , analytical chemistry (journal) , materials science , chemistry , crystallography , mineralogy , physics , metallurgy , environmental chemistry , quantum mechanics
Single‐phase spinel manganese cobalt oxides Mn 3− x Co x O 4 dense ceramics were prepared for the first time and their structural/electrical property relationships characterized. The electrical properties, that is, the resistivity at 25°C, the energetic constant, and the resistance drift at 125°C, were determined and correlated with the cation distribution. Finally, the electrical characteristics of the Mn 3− x Co x O 4 system were compare'd with other important classes of manganese‐based spinel oxides, Mn 3− x Ni x O 4 and Mn 3− x Cu x O 4 , already commercialized as negative temperature coefficient ( NTC ) thermistors. The high values of energetic constant and low resistivities observed in Mn 3− x Co x O 4 ceramics present a promising interest for such industrial applications.