Phase Stability Control of Interstitial Oxide Ion Conductivity in the La1+xSr1-xGa3O7+x/2 Melilite Family.

Chris I. Thomas; Xiaojun Kuang; Zengqiang Deng; Hongjun Niu; John B. Claridge; Matthew J. Rosseinsky

doi:10.1021/cm903132w

Phase Stability Control of Interstitial Oxide Ion Conductivity in the La1+xSr1-xGa3O7+x/2 Melilite Family.

Chris I. Thomas, Xiaojun Kuang, Zengqiang Deng, Hongjun Niu, John B. Claridge, Matthew J. Rosseinsky

Not published at Aalto University

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

Abstract

The two-dimensional polyhedral anion network melilites La1+xSr1-xGa3O7+0.5x exhibit interstitial oxide ion cond. The solid soln. is shown to extend to x = 0.64, and the variation of the cond. with x is investigated. At high temps., all of these compds. adopt the typical tetragonal melilite structure. When x > 0.6, cooling below 600° results in a reversible phase transition to an orthorhombic structure which reduces the ionic cond. Quenching expts. have shown the tetragonal structure has a higher cond. compared to the orthorhombic structure of the same compn. Short-range order effects assocd. with this transition exercise an important influence on the compn.- and temp.-dependence of the cond. [on SciFinder(R)]

Original language	English
Pages (from-to)	2510-2516
Number of pages	7
Journal	Chemistry of Materials
Volume	22
Issue number	8
DOIs	https://doi.org/10.1021/cm903132w
Publication status	Published - 30 Mar 2010
MoE publication type	A1 Journal article-refereed

Keywords

lanthanum strontium gallate ceramic compn ionic cond

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10.1021/cm903132w

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title = "Phase Stability Control of Interstitial Oxide Ion Conductivity in the La1+xSr1-xGa3O7+x/2 Melilite Family.",

abstract = "The two-dimensional polyhedral anion network melilites La1+xSr1-xGa3O7+0.5x exhibit interstitial oxide ion cond. The solid soln. is shown to extend to x = 0.64, and the variation of the cond. with x is investigated. At high temps., all of these compds. adopt the typical tetragonal melilite structure. When x > 0.6, cooling below 600° results in a reversible phase transition to an orthorhombic structure which reduces the ionic cond. Quenching expts. have shown the tetragonal structure has a higher cond. compared to the orthorhombic structure of the same compn. Short-range order effects assocd. with this transition exercise an important influence on the compn.- and temp.-dependence of the cond. [on SciFinder(R)]",

keywords = "lanthanum strontium gallate ceramic compn ionic cond",

author = "Thomas, {Chris I.} and Xiaojun Kuang and Zengqiang Deng and Hongjun Niu and Claridge, {John B.} and Rosseinsky, {Matthew J.}",

year = "2010",

month = mar,

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doi = "10.1021/cm903132w",

language = "English",

volume = "22",

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journal = "Chemistry of Materials",

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T1 - Phase Stability Control of Interstitial Oxide Ion Conductivity in the La1+xSr1-xGa3O7+x/2 Melilite Family.

AU - Thomas, Chris I.

AU - Kuang, Xiaojun

AU - Deng, Zengqiang

AU - Niu, Hongjun

AU - Claridge, John B.

AU - Rosseinsky, Matthew J.

PY - 2010/3/30

Y1 - 2010/3/30

N2 - The two-dimensional polyhedral anion network melilites La1+xSr1-xGa3O7+0.5x exhibit interstitial oxide ion cond. The solid soln. is shown to extend to x = 0.64, and the variation of the cond. with x is investigated. At high temps., all of these compds. adopt the typical tetragonal melilite structure. When x > 0.6, cooling below 600° results in a reversible phase transition to an orthorhombic structure which reduces the ionic cond. Quenching expts. have shown the tetragonal structure has a higher cond. compared to the orthorhombic structure of the same compn. Short-range order effects assocd. with this transition exercise an important influence on the compn.- and temp.-dependence of the cond. [on SciFinder(R)]

AB - The two-dimensional polyhedral anion network melilites La1+xSr1-xGa3O7+0.5x exhibit interstitial oxide ion cond. The solid soln. is shown to extend to x = 0.64, and the variation of the cond. with x is investigated. At high temps., all of these compds. adopt the typical tetragonal melilite structure. When x > 0.6, cooling below 600° results in a reversible phase transition to an orthorhombic structure which reduces the ionic cond. Quenching expts. have shown the tetragonal structure has a higher cond. compared to the orthorhombic structure of the same compn. Short-range order effects assocd. with this transition exercise an important influence on the compn.- and temp.-dependence of the cond. [on SciFinder(R)]

KW - lanthanum strontium gallate ceramic compn ionic cond

U2 - 10.1021/cm903132w

DO - 10.1021/cm903132w

M3 - Article

VL - 22

SP - 2510

EP - 2516

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 8

ER -

Phase Stability Control of Interstitial Oxide Ion Conductivity in the La1+xSr1-xGa3O7+x/2 Melilite Family.

Abstract

Keywords

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