Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Clay-Mineral Composition on Flexural Strength of Clay-based Membranes

점토 광물 조성이 점토기반 분리막의 곡강도에 미치는 영향

  • Lee, Young-Il (Department of Optometry and Vision Science, Dongnam Health College) ;
  • Eom, Jung-Hye (Functional Ceramics Laboratory, Department of Materials Science and Engineering, The University of Seoul) ;
  • Kim, Young-Wook (Functional Ceramics Laboratory, Department of Materials Science and Engineering, The University of Seoul) ;
  • Song, In-Hyuck (Engineering Ceramics Group, Korea Institute of Materials Science)
  • 이영일 (동남보건대학교 안경광학과) ;
  • 엄정혜 (서울시립대학교 신소재공학과 기능성세라믹스연구실) ;
  • 김영욱 (서울시립대학교 신소재공학과 기능성세라믹스연구실) ;
  • 송인혁 (재료연구소 엔지니어링세라믹연구그룹)
  • Received : 2014.07.29
  • Accepted : 2014.08.28
  • Published : 2014.09.30
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Abstract

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.

Keywords

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