Development of Porous Silicon Nitride with Tailor-Made Pore Structure for Bio-Filter: I. Search of Sintering Aids

DOI Web Site 3 Citations 16 References
  • ANAN Tsutomu
    Department of Functional Materials Engineering, Fukuoka Institute of Technology
  • KITAYAMA Mikito
    Department of Functional Materials Engineering, Fukuoka Institute of Technology
  • OHTA Yoshio
    Department of Functional Materials Engineering, Fukuoka Institute of Technology

Bibliographic Information

Other Title
  • 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
  • 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(1)焼給助剤の探索
  • バイオフィルターヨウ テーラーメイドサイコウ コウゾウ オ ユウスル チッカ ケイソ タコウタイ ノ カイハツ 1 ショウキュウジョザイ ノ タンサク

Search this article

Abstract

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-Si3N4 crystals that would be essential for high toughness. The conventional technique for developing porous Si3N4 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 BaCO3 met the necessary conditions, probably because the decomposition temperature was as high as the liquidus temperature, and the internal CO2 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-Si3N4 crystals with sub-micrometer pore sizes.

Journal

  • Journal of MMIJ

    Journal of MMIJ 124 (4/5), 245-248, 2008

    The Mining and Materials Processing Institute of Japan

Citations (3)*help

See more

References(16)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top