Fabrication of Functionally Graded SiO2-Mo Material by Centrifugation and Floc-Casting of Highly Concentrated Slurry

Authors

  • Takuya Honma,

    Corresponding authorCurrent affiliation:
    1. Research & Development Center, Toshiba Lighting & Technology Corporation, Yokohama, Kanagawa, Japan
    • Environmental Protection & Material Engineering Department, Toshiba Lighting & Technology Corporation, Yokosuka, Kanagawa, Japan
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  • Ikue Sasaki,

    1. Environmental Protection & Material Engineering Department, Toshiba Lighting & Technology Corporation, Yokosuka, Kanagawa, Japan
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  • Nobuhiro Tamura,

    1. Environmental Protection & Material Engineering Department, Toshiba Lighting & Technology Corporation, Yokosuka, Kanagawa, Japan
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  • Junichi Tatami,

    1. Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, Japan
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  • Shinichiro Fujichika,

    1. Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, Japan
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  • Katsutoshi Komeya,

    1. Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, Japan
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  • Takeshi Meguro

    1. Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Kanagawa, Japan
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takuya.honma@tlt.co.jp

Abstract

To fabricate functionally graded materials, a highly concentrated slurry of SiO2-Mo system was prepared and centrifugal force was applied in an attempt to achieve a graded composition. Subsequently, we formed a homogeneous green body with compositional gradation by floc-casting at 80°C, which was then fired at 1750°C for 10 min in Ar. The sintered body had compositional ratios of SiO2 and Mo as well as electrical conductivities that changed gradually along the direction of centrifugal force. The results demonstrate that centrifugation and control of slurry characteristics such as flocculation are effective in fabricating functionally graded SiO2-Mo materials.

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