In situ neutron diffraction study on fast oxide ion conductor LaGaO 3-based perovskite compounds

Masahiro Kajitani; Motohide Matsuda; Akinori Hoshikawa; Stefanus Harjo; Takashi Kamiyama; Toru Ishigaki; Fujio Izumi; Michihiro Miyake

doi:10.1021/cm050597n

In situ neutron diffraction study on fast oxide ion conductor LaGaO ₃-based perovskite compounds

Masahiro Kajitani, Motohide Matsuda, Akinori Hoshikawa, Stefanus Harjo, Takashi Kamiyama, Toru Ishigaki, Fujio Izumi, Michihiro Miyake

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

42 Citations (Scopus)

Abstract

The crystal structures of LaGaO₃, LaGa_0.9Mg _0.1O_2.95, and La_0.9Sr_0.1Ga _0.9Mg_0.1O_2.9 have been investigated by high-temperature neutron powder diffraction in order to clarify a mechanism for high oxide ion conduction properties in LaGaO₃-based compounds. Parent phase LaGaO₃ crystallized in the orthorhombic (Pbnm) up to 150°C and the rhombohedral (R3c) at between 160 and 800 °C. LaGa _0.9Mg_0.1O_2.95 crystallized in the orthorhombic (Ibmm) up to 340°C and the rhombohedral (R3̄c) at between 350 and 800°C. On the other hand, La_0.9Sr_0.1Ga _0.9Mg_0.1O_2.9 crystallized in the monoclinic (I2/a) up to 400°C and the rhombohedral (R3̄c) at between 410 and 800°C. The correlations between the crystal structures and conduction properties of LaGaO₃-based materials were discussed on the basis of the analytical results.

Original language	English
Pages (from-to)	4235-4243
Number of pages	9
Journal	Chemistry of Materials
Volume	17
Issue number	16
DOIs	https://doi.org/10.1021/cm050597n
Publication status	Published - Aug 9 2005

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Materials Chemistry

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title = "In situ neutron diffraction study on fast oxide ion conductor LaGaO 3-based perovskite compounds",

abstract = "The crystal structures of LaGaO3, LaGa0.9Mg 0.1O2.95, and La0.9Sr0.1Ga 0.9Mg0.1O2.9 have been investigated by high-temperature neutron powder diffraction in order to clarify a mechanism for high oxide ion conduction properties in LaGaO3-based compounds. Parent phase LaGaO3 crystallized in the orthorhombic (Pbnm) up to 150°C and the rhombohedral (R3c) at between 160 and 800 °C. LaGa 0.9Mg0.1O2.95 crystallized in the orthorhombic (Ibmm) up to 340°C and the rhombohedral (R{\=3}c) at between 350 and 800°C. On the other hand, La0.9Sr0.1Ga 0.9Mg0.1O2.9 crystallized in the monoclinic (I2/a) up to 400°C and the rhombohedral (R{\=3}c) at between 410 and 800°C. The correlations between the crystal structures and conduction properties of LaGaO3-based materials were discussed on the basis of the analytical results.",

author = "Masahiro Kajitani and Motohide Matsuda and Akinori Hoshikawa and Stefanus Harjo and Takashi Kamiyama and Toru Ishigaki and Fujio Izumi and Michihiro Miyake",

year = "2005",

month = aug,

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doi = "10.1021/cm050597n",

language = "English",

volume = "17",

pages = "4235--4243",

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T1 - In situ neutron diffraction study on fast oxide ion conductor LaGaO 3-based perovskite compounds

AU - Kajitani, Masahiro

AU - Matsuda, Motohide

AU - Hoshikawa, Akinori

AU - Harjo, Stefanus

AU - Kamiyama, Takashi

AU - Ishigaki, Toru

AU - Izumi, Fujio

AU - Miyake, Michihiro

PY - 2005/8/9

Y1 - 2005/8/9

N2 - The crystal structures of LaGaO3, LaGa0.9Mg 0.1O2.95, and La0.9Sr0.1Ga 0.9Mg0.1O2.9 have been investigated by high-temperature neutron powder diffraction in order to clarify a mechanism for high oxide ion conduction properties in LaGaO3-based compounds. Parent phase LaGaO3 crystallized in the orthorhombic (Pbnm) up to 150°C and the rhombohedral (R3c) at between 160 and 800 °C. LaGa 0.9Mg0.1O2.95 crystallized in the orthorhombic (Ibmm) up to 340°C and the rhombohedral (R3̄c) at between 350 and 800°C. On the other hand, La0.9Sr0.1Ga 0.9Mg0.1O2.9 crystallized in the monoclinic (I2/a) up to 400°C and the rhombohedral (R3̄c) at between 410 and 800°C. The correlations between the crystal structures and conduction properties of LaGaO3-based materials were discussed on the basis of the analytical results.

AB - The crystal structures of LaGaO3, LaGa0.9Mg 0.1O2.95, and La0.9Sr0.1Ga 0.9Mg0.1O2.9 have been investigated by high-temperature neutron powder diffraction in order to clarify a mechanism for high oxide ion conduction properties in LaGaO3-based compounds. Parent phase LaGaO3 crystallized in the orthorhombic (Pbnm) up to 150°C and the rhombohedral (R3c) at between 160 and 800 °C. LaGa 0.9Mg0.1O2.95 crystallized in the orthorhombic (Ibmm) up to 340°C and the rhombohedral (R3̄c) at between 350 and 800°C. On the other hand, La0.9Sr0.1Ga 0.9Mg0.1O2.9 crystallized in the monoclinic (I2/a) up to 400°C and the rhombohedral (R3̄c) at between 410 and 800°C. The correlations between the crystal structures and conduction properties of LaGaO3-based materials were discussed on the basis of the analytical results.

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In situ neutron diffraction study on fast oxide ion conductor LaGaO ₃-based perovskite compounds

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