Publication Date:
2012-04-15
Description:
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.
Print ISSN:
1546-542X
Electronic ISSN:
1744-7402
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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