Studies on the perovskite-based La4Srn-4Ti nO3n+2

Jesús Canales-Vázquez; Shawen Tao; Mikhail Patrakeev; John T.S. Irvine; Wuzong Zhou; Jorge Frade

Studies on the perovskite-based La₄Sr_n-4Ti _nO_3n+2

Jesús Canales-Vázquez^*, Shawen Tao, Mikhail Patrakeev, John T.S. Irvine, Wuzong Zhou, Jorge Frade

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

Abstract

Perovskite titanates with nominal stoichiometry ABO_3+δ are frequently reported in SOFC literature as having O₃ stoichiometry. Such phases often exhibit quite interesting properties, but are not stoichiometric and the structural characterisation is usually not rigorous. Here we demonstrate how oxygen excess can be incorporated in a titanate perovskite-based lattice as crystallographic oxygen shears giving rise to the homologous series La₄Sr_n-4Ti_nO_3n+2. The layered structure is lost for the n=12 member (La₄Sr ₆Ti₁₂O_38-δ), although the oxygen excess is accommodated within the perovskite framework in randomly distributed short-range linear defects. This compound was studied as potential fuel electrode due to its high total conductivity and stability in the most reducing conditions.

Original language	English
Pages	211-216
Number of pages	6
Publication status	Published - 1 Dec 2003
Event	Materials and Technology for Hydrogen Economy - Boston, MA., United States Duration: 1 Dec 2003 → 3 Dec 2003

Conference

Conference	Materials and Technology for Hydrogen Economy
Country/Territory	United States
City	Boston, MA.
Period	1/12/03 → 3/12/03

Cite this

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title = "Studies on the perovskite-based La4Srn-4Ti nO3n+2",

abstract = "Perovskite titanates with nominal stoichiometry ABO3+δ are frequently reported in SOFC literature as having O3 stoichiometry. Such phases often exhibit quite interesting properties, but are not stoichiometric and the structural characterisation is usually not rigorous. Here we demonstrate how oxygen excess can be incorporated in a titanate perovskite-based lattice as crystallographic oxygen shears giving rise to the homologous series La4Srn-4TinO3n+2. The layered structure is lost for the n=12 member (La4Sr 6Ti12O38-δ), although the oxygen excess is accommodated within the perovskite framework in randomly distributed short-range linear defects. This compound was studied as potential fuel electrode due to its high total conductivity and stability in the most reducing conditions.",

author = "Jes{\'u}s Canales-V{\'a}zquez and Shawen Tao and Mikhail Patrakeev and Irvine, {John T.S.} and Wuzong Zhou and Jorge Frade",

year = "2003",

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language = "English",

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T1 - Studies on the perovskite-based La4Srn-4Ti nO3n+2

AU - Canales-Vázquez, Jesús

AU - Tao, Shawen

AU - Patrakeev, Mikhail

AU - Irvine, John T.S.

AU - Zhou, Wuzong

AU - Frade, Jorge

PY - 2003/12/1

Y1 - 2003/12/1

N2 - Perovskite titanates with nominal stoichiometry ABO3+δ are frequently reported in SOFC literature as having O3 stoichiometry. Such phases often exhibit quite interesting properties, but are not stoichiometric and the structural characterisation is usually not rigorous. Here we demonstrate how oxygen excess can be incorporated in a titanate perovskite-based lattice as crystallographic oxygen shears giving rise to the homologous series La4Srn-4TinO3n+2. The layered structure is lost for the n=12 member (La4Sr 6Ti12O38-δ), although the oxygen excess is accommodated within the perovskite framework in randomly distributed short-range linear defects. This compound was studied as potential fuel electrode due to its high total conductivity and stability in the most reducing conditions.

AB - Perovskite titanates with nominal stoichiometry ABO3+δ are frequently reported in SOFC literature as having O3 stoichiometry. Such phases often exhibit quite interesting properties, but are not stoichiometric and the structural characterisation is usually not rigorous. Here we demonstrate how oxygen excess can be incorporated in a titanate perovskite-based lattice as crystallographic oxygen shears giving rise to the homologous series La4Srn-4TinO3n+2. The layered structure is lost for the n=12 member (La4Sr 6Ti12O38-δ), although the oxygen excess is accommodated within the perovskite framework in randomly distributed short-range linear defects. This compound was studied as potential fuel electrode due to its high total conductivity and stability in the most reducing conditions.

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M3 - Paper

AN - SCOPUS:2442674355

SP - 211

EP - 216

T2 - Materials and Technology for Hydrogen Economy

Y2 - 1 December 2003 through 3 December 2003

ER -

Studies on the perovskite-based La₄Sr_n-4Ti _nO_3n+2

Abstract

Conference

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