Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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The Effects of Kaolin Addition on the Properties of Reticulated Porous Diatomite-kaolin Composites

고령토의 첨가가 3차원 망상 구조를 가지는 다공성 규조토-고령토 복합재의 기본 특성에 미치는 영향

  • Lee, Chae-Young (Powder and Ceramics Division, Korea Institute of Materials Science) ;
  • Lee, Sujin (Powder and Ceramics Division, Korea Institute of Materials Science) ;
  • Ha, Jang-Hoon (Powder and Ceramics Division, Korea Institute of Materials Science) ;
  • Lee, Jongman (Powder and Ceramics Division, Korea Institute of Materials Science) ;
  • Song, In-Hyuck (Powder and Ceramics Division, Korea Institute of Materials Science) ;
  • Moon, Kyoung-Seok (School of Materials Science and Engineering, Gyeongsang National University)
  • 이채영 (재료연구소 분말.세라믹 연구본부) ;
  • 이수진 (재료연구소 분말.세라믹 연구본부) ;
  • 하장훈 (재료연구소 분말.세라믹 연구본부) ;
  • 이종만 (재료연구소 분말.세라믹 연구본부) ;
  • 송인혁 (재료연구소 분말.세라믹 연구본부) ;
  • 문경석 (경상대학교 재료공학과)
  • Received : 2020.08.10
  • Accepted : 2020.08.24
  • Published : 2020.08.28
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Abstract

In this study, the effects of kaolin addition on the properties of reticulated porous diatomite-kaolin composites are investigated. A reticulated porous diatomite-kaolin composite is prepared using the replica template method. The microstructure and pore characteristics of the reticulated porous diatomite-kaolin composites are analyzed by controlling the PPI value (45, 60, and 80 PPI) of the polyurethane foam (which are used as the polymer template), the ball-milling time (8 and 24 h), and the amount of kaolin (0-50 wt. %). The average pore size decreases as the amount of kaolin increases in the reticulated porous diatomite-kaolin composite. As the amount of kaolin increases, it can be determined that the amount of inter-connected pore channels is reduced because the plate-shaped kaolin particles connect the gaps between irregular diatomite particles. Consequently, a higher kaolin percentage affects the overall mechanical properties by improving the pore channel connectivity. The effect of kaolin addition on the basic properties of the reticulated porous diatomite-kaolin composite is further discussed with characterization data such as pore size distribution, scanning electron microscopy images, and compressive strength.

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References

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