Abstract
In this work, thin films (~1000 nm) of a pure MnCo2O4 spinel together with its partially substituted derivatives (MnCo1.6Cu0.2Fe0.2O4, MnCo1.6Cu0.4O4, MnCo1.6Fe0.4O4)
were prepared by spray pyrolysis and were evaluated for electrical
conductivity. Doping by Cu increases the electrical conductivity,
whereas doping by Fe decreases the conductivity. For Cu containing
samples, rapid grain growth occurs and these samples develop cracks due
to a potentially too high thermal expansion coefficient mismatch to the
support. Samples doped with both Cu and Fe show high electrical
conductivity, normal grain growth and no cracks. By co-doping the Mn, Co
spinel with both Cu and Fe, its properties can be tailored to reach a
desired thermal expansion coefficient/electrical conductivity value.
Original language | English |
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Article number | 185 |
Journal | Crystals |
Volume | 7 |
Issue number | 7 |
Number of pages | 12 |
ISSN | 2073-4352 |
DOIs | |
Publication status | Published - 2017 |
Keywords
- Manganese cobalt spinel
- High temperature protective coatings
- Thin films
- Electrical conductivity