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Preparation of Si3N4 whiskers by reaction of wheat husks with NH3

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Abstract

α-Si3N4 whiskers that are 1–10 mm long and 0.5–1.1 μm thick were obtained by the reaction of wheat husks with NH3 at 1250–1450 °C. A maximum whisker yield of about 30% was obtained at 1450 °C with the addition of an iron impurity. Whiskers with 1.3–2.2 μm thickness (average 1.6 μm) were obtained by the addition of an H2S impurity. Thin whiskers with periodic thick and thin diameters were also obtained.

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Authors and Affiliations

  1. Department of Applied Chemistry, Faculty of Engineering, Gifu University, 501-11, Gifu, Japan

    S. Motojima & Y. Hori

  2. Cotec Ltd, 1-121 Yatsuya-cho, Nakagawa-ku, 454, Nagoya, Japan

    S. Gakei

  3. Faculty of Liberal Arts, Nagasaki University, 852, Nagasaki, Japan

    H. Iwanaga

Authors
  1. S. Motojima
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  2. Y. Hori
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  3. S. Gakei
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  4. H. Iwanaga
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Motojima, S., Hori, Y., Gakei, S. et al. Preparation of Si3N4 whiskers by reaction of wheat husks with NH3 . J Mater Sci 30, 3888–3892 (1995). https://doi.org/10.1007/BF01153951

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  • DOI: https://doi.org/10.1007/BF01153951

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