| 점토 광물 조성이 점토기반 분리막의 곡강도에 미치는 영향 |
| 이영일, 엄정혜1, 김영욱1, 송인혁2 |
동남보건대학교 안경광학과
1서울시립대학교 신소재공학과 기능성세라믹스연구실
2재료연구소 엔지니어링세라믹연구그룹 |
| Effect of Clay-Mineral Composition on Flexural Strength of Clay-based Membranes |
| Young-Il Lee, Jung-Hye Eom1, Young-Wook Kim1, In-Hyuck Song2 |
Department of Optometry and Vision Science, Dongnam Health College
1Functional Ceramics Laboratory, Department of Materials Science and Engineering, The University of Seoul
2Engineering Ceramics Group, Korea Institute of Materials Science |
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| ABSTRACT |
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Clay-based membranes with submicron pore size were successfully prepared by a simple pressing process using low-cost starting materials(e.g., kaolin (K), bentonite (B), talc (T), and sodium borate). The green bodies were sintered at $1000^{circ}C$ for 2 h in air. The effect of clay-mineral composition on the flexural strength of clay-based membranes was investigated. The porosity of the clay-based membranes could be controlled within the range of 34 - 42% by adjusting the starting composition. The flexural strength of the low-cost membranes depended on both the porosity and the ${alpha}$-quartz content. In turn, the porosity and ${alpha}$-quartz content were affected by the (B+T) /(K+B+T) ratio. The plot of strength relative to this ratio, showed a maximum when the ratio was 0.4. The typical flexural strength of these clay-based membranes (with ratio 0.4) was 28 MPa at 34% porosity. |
| Key words:
Clay, Membranes, Porosity, Strength, Additive |
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