Thermochemistry of perovskites in the lanthanum-strontium-manganese-iron oxide system

Cornelia Marinescu; Leonid Vradman; Speranta Tanasescu; Alexandra Navrotsky

doi:10.1016/j.jssc.2015.07.032

Thermochemistry of perovskites in the lanthanum-strontium-manganese-iron oxide system

Cornelia Marinescu, Leonid Vradman, Speranta Tanasescu, Alexandra Navrotsky

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

The enthalpies of formation from binary oxides of perovskites (ABO₃) based on lanthanum strontium manganite La(Sr)MnO₃ (LSM) and lanthanum strontium ferrite La(Sr)FeO₃ (LSF) and mixed lanthanum strontium manganite ferrite La(Sr)Mn(Fe)O₃ (LSMF) were measured by high temperature oxide melt solution calorimetry. Using iodometric titration, the oxygen content was derived. The perovskites with A-site cation deficiency have greater oxygen deficiency than the corresponding A-site stoichiometric series. Stability of LSMF decreases with increasing iron content. Increasing oxygen deficiency clearly destabilizes the perovskites. The results suggest an enthalpy of oxygen incorporation that is approximately independent of composition.

Original language	English
Pages (from-to)	411-417
Number of pages	7
Journal	Journal of Solid State Chemistry
Volume	230
DOIs	https://doi.org/10.1016/j.jssc.2015.07.032
State	Published - 10 Aug 2015
Externally published	Yes

Keywords

Calorimetry
Perovskite
SOFC

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jssc.2015.07.032

Cite this

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title = "Thermochemistry of perovskites in the lanthanum-strontium-manganese-iron oxide system",

abstract = "The enthalpies of formation from binary oxides of perovskites (ABO3) based on lanthanum strontium manganite La(Sr)MnO3 (LSM) and lanthanum strontium ferrite La(Sr)FeO3 (LSF) and mixed lanthanum strontium manganite ferrite La(Sr)Mn(Fe)O3 (LSMF) were measured by high temperature oxide melt solution calorimetry. Using iodometric titration, the oxygen content was derived. The perovskites with A-site cation deficiency have greater oxygen deficiency than the corresponding A-site stoichiometric series. Stability of LSMF decreases with increasing iron content. Increasing oxygen deficiency clearly destabilizes the perovskites. The results suggest an enthalpy of oxygen incorporation that is approximately independent of composition.",

keywords = "Calorimetry, Perovskite, SOFC",

author = "Cornelia Marinescu and Leonid Vradman and Speranta Tanasescu and Alexandra Navrotsky",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Inc.",

year = "2015",

month = aug,

day = "10",

doi = "10.1016/j.jssc.2015.07.032",

language = "English",

volume = "230",

pages = "411--417",

journal = "Journal of Solid State Chemistry",

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publisher = "Academic Press Inc.",

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T1 - Thermochemistry of perovskites in the lanthanum-strontium-manganese-iron oxide system

AU - Marinescu, Cornelia

AU - Vradman, Leonid

AU - Tanasescu, Speranta

AU - Navrotsky, Alexandra

PY - 2015/8/10

Y1 - 2015/8/10

N2 - The enthalpies of formation from binary oxides of perovskites (ABO3) based on lanthanum strontium manganite La(Sr)MnO3 (LSM) and lanthanum strontium ferrite La(Sr)FeO3 (LSF) and mixed lanthanum strontium manganite ferrite La(Sr)Mn(Fe)O3 (LSMF) were measured by high temperature oxide melt solution calorimetry. Using iodometric titration, the oxygen content was derived. The perovskites with A-site cation deficiency have greater oxygen deficiency than the corresponding A-site stoichiometric series. Stability of LSMF decreases with increasing iron content. Increasing oxygen deficiency clearly destabilizes the perovskites. The results suggest an enthalpy of oxygen incorporation that is approximately independent of composition.

AB - The enthalpies of formation from binary oxides of perovskites (ABO3) based on lanthanum strontium manganite La(Sr)MnO3 (LSM) and lanthanum strontium ferrite La(Sr)FeO3 (LSF) and mixed lanthanum strontium manganite ferrite La(Sr)Mn(Fe)O3 (LSMF) were measured by high temperature oxide melt solution calorimetry. Using iodometric titration, the oxygen content was derived. The perovskites with A-site cation deficiency have greater oxygen deficiency than the corresponding A-site stoichiometric series. Stability of LSMF decreases with increasing iron content. Increasing oxygen deficiency clearly destabilizes the perovskites. The results suggest an enthalpy of oxygen incorporation that is approximately independent of composition.

KW - Calorimetry

KW - Perovskite

KW - SOFC

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U2 - 10.1016/j.jssc.2015.07.032

DO - 10.1016/j.jssc.2015.07.032

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AN - SCOPUS:84938771443

SN - 0022-4596

VL - 230

SP - 411

EP - 417

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

ER -

Thermochemistry of perovskites in the lanthanum-strontium-manganese-iron oxide system

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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