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Fabrication and Analysis of the Oriented LiCoO2 by Slip Casting in a Strong Magnetic Field

Authors

  • Hideto Yamada,

    1. Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
    2. Materials Processing Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    3. NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility, Tsukuba, Ibaraki, Japan
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  • Tohru S. Suzuki,

    1. Materials Processing Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    2. NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility, Tsukuba, Ibaraki, Japan
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    • Member, The American Ceramic Society
  • Tetsuo Uchikoshi,

    1. Materials Processing Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    2. NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility, Tsukuba, Ibaraki, Japan
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  • Masato Hozumi,

    1. Higashifuji Technical Center, Toyota Motor Corporation, Susono, Shizuoka, Japan
    2. NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility, Tsukuba, Ibaraki, Japan
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  • Keiichi Kohama,

    1. Higashifuji Technical Center, Toyota Motor Corporation, Susono, Shizuoka, Japan
    2. NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility, Tsukuba, Ibaraki, Japan
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  • Yoshio Sakka

    Corresponding author
    1. Materials Processing Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
    2. NIMS-TOYOTA Materials Center of Excellence for Sustainable Mobility, Tsukuba, Ibaraki, Japan
    • Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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    • Member, The American Ceramic Society

Author to whom correspondence should be addressed. e-mail: SAKKA.Yoshio@nims.go.jp

Abstract

We attempted to fabricate the oriented bulk LiCoO2 using slip casting in a strong magnetic field. The shrinkage of the oriented green compact was measured using a dilatometer. It was confirmed that the oriented green compact undergoes anisotropic shrinkage. The shrinkage in the c-plane direction of the oriented LiCoO2 was greater than that in the c-axis direction. The degree of orientation in the bulk LiCoO2 was analyzed using XRD and electron backscatter diffraction; the c-axis of LiCoO2 was oriented parallel to the magnetic field. Moreover, the orientation parameter, r, was 0.234, indicating that 92% of the grains was aligned with a tilt angle less than 10° between the c-axis and the magnetic field direction. The texturing led LiCoO2 to anisotropy in the electric conductivity between the c-plane and c-axis directions. It was concluded that the magneto-scientific technique is a powerful method to fabricate highly oriented bulk LiCoO2.

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