Characterization and thermal expansion of Sr2Fe x Mo2−x O6 double perovskites

Markandeya, Y.; Reddy, Y. S.; Bale, Shashidhar; Reddy, C. Vishnuvardhan; Bhikshamaiah, G.

doi:10.1007/s12034-015-0972-2

Cited by 13 publications

(3 citation statements)

References 27 publications

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“…Therefore, it is expected that there will be possible differences between the theoretical results presented in Figure 8b and the real experimental response that could be measured in the laboratory. The very low value of the coefficient of thermal expansion for this material suggests that it can be applied at low temperatures as material for fuel cell anodes [33].…”

Section: Resultsmentioning

confidence: 99%

Half-metallic electronic feature and thermophysicalproperties of the Ba2CoMoO6perovskite-like cobalt molybdate

Deluque-Toro

Gil-Rebaza²,

Hernández³

et al. 2020

revuin

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Perovskite-like materials which include magnetic elements have relevance due to the technological perspectives in the spintronics industry. In this work, the magnetic, structural and electronic properties of the Ba2CoMoO6double perovskite are investigated. Calculations are carried out through the Full-Potential Linear Augmented Plane Wave method within the framework of the Density Functional Theory with exchange and correlation effects in the Generalized Gradient and Local Density approximations, including spin polarization. From the minimization of energy as a function of volume using the Murnaghan’s state equation the equilibrium lattice parameter and cohesive properties of this compound were obtained. The study of the electronic structure was based in the analysis of the electronic density of states, and the band structure, showing that this compoundevidences a conductive character for a spin channel and insulation for the other, and presents an integer value for the effective magnetic moment (3.0 μB), which allows it to be classified as a half-metallic material. The effects of pressure and temperature on thermophysical properties such as specific heat, Debye temperature, coefficient of thermal expansion and the Grüneisen parameter were calculated and analyzed from the state equation of the system. The obtained results reveal that, in the low temperature regime, the specific heat at constant volume and pressure presents an analogous behavior to each other, with a tendency to the limit of Dulong-Petit typical of the structures of cubic perovskite type, showing a value of 246.3 J/mol.Kat constant volumeand slightly higher values at constant pressure. The dependence of the coefficient of thermal expansion, the temperature of Debye and the Grüneisen parameter with the increase in temperature is discussed in relation to other perovskite-like materials.

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Section: Resultsmentioning

confidence: 99%

Half-metallic electronic feature and thermophysicalproperties of the Ba2CoMoO6perovskite-like cobalt molybdate

Deluque-Toro

Gil-Rebaza²,

Hernández³

et al. 2020

revuin

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“…The temperature dependence of the total conductivity of Sr2-xLaxFeCo0.5Mo0.5O6-δ, x = 0.0; 0.2; 0.4 ceramic samples in air and in the reducing atmosphere Ar/H2 (8%) is presented in Table 2 [71]. It is observed that the conductivity in air decreases with increasing La 3+ content.…”

Section: Modifying the A-sublattice In Sr2fe15mo05o6-δmentioning

confidence: 99%

“…According to the results of photoelectron spectroscopy, the major oxidation states are of Sr 2+ , Fe 2+ , and Mo 6+ . However, there should be an accompanying small portion of Fe 3+ /Mo 5+ [70,71]. Therefore, the calculated oxygen atoms in the Sr2Fe1.5Mo0.5O6-δ lattice should be between 5 and 5.75.…”

Section: Complex Oxide Sr2fe15mo05o6-δmentioning

confidence: 99%

Recent advances in heteroatom substitution Sr2Fe1.5Mo0.5O6–δ oxide as a more promising electrode material for symmetrical solid-state electrochemical devices: A review

Поротникова

Осинкин

2022

EM&T

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In recent years, the interest in solid state electrochemical devices has significantly increased due to the various cases of their use in the energy field. The first case is the solid oxide fuel cells with both oxygen-ion and proton-conducting membranes. The second case is the electrolysis cells for hydrogen production. As a rule, in both cases, electrochemical cells consist of an ion-conducting membrane and two different electrodes. The present review is focused on structural, physicochemical, and electrochemical properties of a complex oxide based on strontium ferrite with partial replacement of iron by molybdenum. This complex oxide has a number of unique characteristics: in particular, it is able to function effectively as an electrode in oxidizing and strongly reducing atmospheres, which makes it a promising material for electrochemical devices based on solid electrolytes with symmetrical electrodes. Doping with elements in A-, B- and O-sublattices and surface modification increases electro-catalytic activity of Sr2Fe1.5Mo0.5O6−δ porous oxide material, which increases competitiveness of the electrode material for application in solid oxide electrochemical devices. Mechanisms for improving electro-catalytic activity are outlined stepwise by doping of different sublattices of double perovskite, by level of doping, and by different types of dopants. In conclusion, the data on material conductivity, power densities of both symmetric and fuel cells are systematized, and the remaining problems and prospects for future developments and upgrades of Sr2Fe1.5Mo0.5O6−δ oxide electrode material are described.

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Structural, dielectric, thermal and electrical characteristics of lead-free double perovskite: BiHoZnCeO6

Padhy

Dehury²,

Choudhary

et al. 2020

Appl. Phys. A

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Characterization and thermal expansion of Sr2Fe x Mo2−x O6 double perovskites

Cited by 13 publications

References 27 publications

Half-metallic electronic feature and thermophysicalproperties of the Ba2CoMoO6perovskite-like cobalt molybdate

Half-metallic electronic feature and thermophysicalproperties of the Ba2CoMoO6perovskite-like cobalt molybdate

Recent advances in heteroatom substitution Sr2Fe1.5Mo0.5O6–δ oxide as a more promising electrode material for symmetrical solid-state electrochemical devices: A review

Structural, dielectric, thermal and electrical characteristics of lead-free double perovskite: BiHoZnCeO6

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