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Effect of cobalt content on the properties of quintuple perovskites Sm₂Ba₃Fe₅-xCoxO₁₅-δ
- Source :
- Journal of solid state chemistry
- Publication Year :
- 2021
-
Abstract
- Quintuple perovskites Sm2Ba3Fe5-xCoxO15-delta = 0.5, 1.0 and 1.5) have been prepared by glycerin-nitrate tech- nique in air. The phase purity was confirmed by XRD. Partial substitution of Co for Fe decreases the oxygen content and thus the mean oxidation state of 3d-metals. It also slightly decreases the thermal expansion coefficient of oxides. Positive value of the Seebeck coefficient confirmed p-type conductivity, though the thermopower decreases as the Co content increases. The temperature dependence of electrical conductivity reveals a maximum at 550-750 degrees C.
- Subjects :
- Chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 00224596
- Database :
- OpenAIRE
- Journal :
- Journal of solid state chemistry
- Accession number :
- edsair.od......2097..a17e10357caf368ae7473cf5d87dbd03