アルミナ焼結体の透光性に及ぼす結晶粒径の影響 Effect of Grain Size on Translucency of Polycrystalline Alumina

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Translucent polycrystalline aluminas with different grain sizes were obtained by sintering the green compact, which was fabricated by using slip casting methods for high-purity α-alumina (99.99 %) powder of 0.24 μm in grain size, at 1,373 ∼ 2,073 K and by applying HIP method. Effect of average grain size on transmittance and mechanical strength of sintered bodies was investigated. For sintered bodies with average grain size of less than 2 μm, transmittance increased because of the effect by Rayleigh scattering. Non-translucent alumina with average grain size about 2 ∼ 7 μm is considered to follow Mie scattering. For average grain sizes larger than 7 μm, the transmittance was slightly increased based on the law of Fresnel. Mechanical strength of sintered body increased with decreasing the grain size, and depended on the inverse-square law of the grain size. Polycrystalline alumina with the average grain size of 0.8 μm showed the excellent properties of high transmittance and high mechanical strength, compared with that of lucalox.

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  • 資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan  

    資源と素材 : 資源・素材学会誌 : journal of the Mining and Materials Processing Institute of Japan 115(6), 471-474, 1999-06 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10002469792
  • NII書誌ID(NCID)
    AN10062646
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09161740
  • NDL 記事登録ID
    4778806
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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