バイオフィルター用テーラーメイド細孔構造を有する窒化ケイ素多孔体の開発 : I. 焼結助剤の探索 Development of Porous Silicon Nitride with Tailor-Made Pore Structure for Bio-Filter : I. Search of Sintering Aids

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著者

    • 阿南 努 ANAN Tsutomu
    • 福岡工業大学大学院 Department of Functional Materials Engineering, Fukuoka Institute of Technology
    • 北山 幹人 KITAYAMA Mikito
    • 福岡工業大学大学院 工学研究科 機能材料工学専攻 Department of Functional Materials Engineering, Fukuoka Institute of Technology
    • 太田 能生 OHTA Yoshio
    • 福岡工業大学大学院 工学研究科 機能材料工学専攻 Department of Functional Materials Engineering, Fukuoka Institute of Technology

抄録

In order to develop porous silicon nitride ceramics with tailor-made pore structure for "Bio-filter", suitable sintering aids were investigated. They must inhibit densification while promoting the α-β transformation to develop the fibrous β-Si<SUB>3</SUB>N<SUB>4</SUB> crystals that would be essential for high toughness. The conventional technique for developing porous Si<SUB>3</SUB>N<SUB>4</SUB> using a removable substance such as starch gave much lower porosity than the volume fraction of starch when MgO was used as a sintering aid. It was found that BaCO<SUB>3</SUB> met the necessary conditions, probably because the decomposition temperature was as high as the liquidus temperature, and the internal CO<SUB>2</SUB> pressure effectively inhibited the densification while promoting the phase transformation. The addition of 7 mol% as BaO gave about 44% of porosity at a sintering temperature as high as 1850°C. It was observed that the porous body consisted of interlocked fibrous β-Si<SUB>3</SUB>N<SUB>4</SUB> crystals with sub-micrometer pore sizes.

収録刊行物

  • Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan  

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan 124(4), 245-248, 2008-05-25 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10021121513
  • NII書誌ID(NCID)
    AA12188381
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    18816118
  • NDL 記事登録ID
    9533578
  • 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  NDL  J-STAGE 
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