Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Fabrication of Humidity Control Ceramics from Drinking-Water Treatment Sludge and Onggi Soil

  • Lee, Min-Jin (Department of Materials Science and Engineering, Inha University) ;
  • Lee, Hyeon-Jun (Department of Materials Science and Engineering, Inha University) ;
  • Kim, Kyungsun (Division of Pottery, KSP) ;
  • Hwang, Hae-Jin (Department of Materials Science and Engineering, Inha University)
  • Received : 2016.02.19
  • Accepted : 2016.02.25
  • Published : 2016.05.31
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Abstract

In this study, humidity control ceramics with good adsorption/desorption capabilities and high strength were fabricated from drinking-water treatment sludge (DWTS) and Onggi soil. The DWTS powder heat-treated at $800^{\circ}C$ and Onggi soil were mixed at weight ratios of 40:60, 50:50, 60:40, and 70:30 and fired at $800-1000^{\circ}C$. With increasing DWTS content, density and flexural strength increased. For the sample with a DWTS:Onggi soil weight ratio of 70:30, porosity and specific surface area decreased with increasing firing temperature, attributed to densification and grain growth at high firing temperatures. From the results obtained, a firing temperature of $800^{\circ}C$ is the optimum condition for fabricating humidity control ceramics with good adsorption/desorption capabilities and strength. The maximum adsorbed amount for the sample fired at $800^{\circ}C$ was $439g/m^2$.

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