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http://dx.doi.org/10.4191/kcers.2014.51.5.380

Effect of Clay-Mineral Composition on Flexural Strength of Clay-based Membranes  

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)
Publication Information
Journal of the Korean Ceramic Society / v.51, no.5, 2014 , pp. 380-385 More about this Journal
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
Clay; Membranes; Porosity; Strength; Additive;
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Times Cited By KSCI : 8  (Citation Analysis)
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