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Characterization and Microstructure of an Extruded Flat-Tubular-Type Alumina Filter

압출공정에 의한 수 처리용 평관형알루미나 필터의 미세구조와 특성평가

  • Bae, Byung-Seo (Engineering Ceramics Department, Korea Institute of Materials Science) ;
  • Ha, Jang-Hoon (Engineering Ceramics Department, Korea Institute of Materials Science) ;
  • Song, In-Hyuck (Engineering Ceramics Department, Korea Institute of Materials Science)
  • 배병서 (한국기계연구원 부설 재료연구소) ;
  • 하장훈 (한국기계연구원 부설 재료연구소) ;
  • 송인혁 (한국기계연구원 부설 재료연구소)
  • Received : 2014.08.18
  • Accepted : 2014.09.06
  • Published : 2014.09.30

Abstract

In this study, flat-tubular-type alumina filters were manufactured using alumina powder of two sizes ($2.4{\mu}m$ ALM-44 and $0.4{\mu}m$ AP 400) by an extrusion process. The manufactured alumina filter was sintered at $1200-1600^{\circ}C$ for 1 h. As particle size increased, the largest pore size, average pore size and porosity increased; but density and linear shrinkage decreased. The alumina filter fabricated using ALM-44 powder sintered at $1500^{\circ}C$ was confirmed as the best water treatment filter after investigation of the bending strength, water permeability and impurity-removal efficiency of the experimental filters. This flat-tubular-type alumina filter is expected to be useful not only for direct water treatment, but also for use as a support filter during coating processes, to control pore size.

Acknowledgement

Supported by : 한국기계연구원

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