Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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The Experimental Assessment of Influence Factors on KLS-1 Microwave Sintering

한국형 인공월면토(KLS-1) 마이크로파 소결에 미치는 영향인자에 관한 실험적 연구

  • Jin, Hyunwoo (Extreme Engrg. Research Center, Korea Institute of Civil Engrg. and Building Technology) ;
  • Lee, Jangguen (Extreme Engrg. Research Center, Korea Institute of Civil Engrg. and Building Technology) ;
  • Ryu, Byung Hyun (Extreme Engrg. Research Center, Korea Institute of Civil Engrg. and Building Technology) ;
  • Shin, Hyu-Soung (Dept., Dept. of Future Tech. & Convergence Research, Korea Institute of Civil Engrg. and Building Technology) ;
  • Kim, Young-Jae (Extreme Engrg. Research Center, Korea Institute of Civil Engrg. and Building Technology)
  • 진현우 (한국건설기술연구원 극한환경연구센터) ;
  • 이장근 (한국건설기술연구원 극한환경연구센터) ;
  • 유병현 (한국건설기술연구원 극한환경연구센터) ;
  • 신휴성 (한국건설기술연구원 미래융합연구본부) ;
  • 김영재 (한국건설기술연구원 극한환경연구센터)
  • Received : 2021.01.28
  • Accepted : 2021.02.12
  • Published : 2021.02.28
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Abstract

The Moon has been an attractive planet as an outpost for deep space exploration since He-3 and water ice which can be used as energy resources were discovered. In-Situ Resource Utilization (ISRU) construction material fabrication method is required for sustainable space planet exploration. In this paper, the possibility of microwave sintering technology for construction material fabrication was evaluated using lunar regolith that can be easily collected from the Moon surface. Experimental assessment of the influence factors on microwave sintering was conducted using a hybrid sintering system for efficient processing. The heat distribution in the furnace was observed using thermal paper that is coated with a material formulated to change color when exposed to heat. Based on this result, sintered cylindrical KLS-1s with a diameter of 1 cm and a height of 2 cm were fabricated. Densities were measured for the sintered KLS-1s under rotating turntable conditions that have an effect of microwave dispersion. The more dielectrics were arranged, the more microwaves were dispersed reducing the heat concentration, and thus a uniformity of sintered KLS-1s was enhanced.

최근 달에서 에너지자원으로 활용할 수 있는 헬륨-3과 물 등이 발견됨에 따라 달은 심우주 탐사를 위한 전초기지로 주목받고 있다. 따라서 지속가능한 우주행성 탐사를 위해 달 현지 자원을 활용한 건설재료 생산 기술이 요구되고 있다. 본 연구에서는 마이크로파를 이용해 달 표면에서 쉽게 채취할 수 있는 월면토를 소결하여 건설재료로 생산하는 기술에 대한 가능성을 평가하였다. 효율적인 소결을 위해 하이브리드 소결 시스템을 구축하고 소결에 미치는 영향인자에 대한 실험적 연구를 수행하였다. 열에 반응하여 변색되는 감열지를 이용해 소결로 내 열 분포를 사전에 파악하고, 이를 기반으로 약 직경 1cm, 높이 2cm의 원통형 한국형 인공월면토 소결체를 제작하였다. 마이크로파를 분산시키는 효과가 있는 회전조건 하에서 제작된 소결체에 대해 밀도를 측정한 결과 마이크로파를 흡수하는 시료가 복수개로 배치될수록 마이크로파가 분산 흡수되어 높이에 따른 열 집중현상이 줄어들어 소결체의 균일도가 향상되었다.

Keywords

Acknowledgement

본 연구는 한국건설기술연구원의 주요사업인 "극한건설 환경 구현 인프라 및 TRL6 이상급 극한건설 핵심기술 개발(20210190-001)" 과제의 지원으로 수행되었으며, 이에 깊은 감사를 드립니다.

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