| 압출공정에 의한 수 처리용 평관형알루미나 필터의 미세구조와 특성평가 |
| 배병서, 하장훈, 송인혁 |
| 한국기계연구원 부설 재료연구소 |
| Characterization and Microstructure of an Extruded Flat-Tubular-Type Alumina Filter |
| Byung-Seo Bae, Jang-Hoon Ha, In-Hyuck Song |
| Engineering Ceramics Department, Korea Institute of Materials Science |
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| ABSTRACT |
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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. |
| Key words:
Alumina, Extrusion, Bending strength, Water permeability, Impurity collecting |
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