한국수소및신에너지학회논문집 (Transactions of the Korean hydrogen and new energy society)

  • 제23권5호
  • /
  • Pages.455-460
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  • 2012
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  • 1738-7264(pISSN)
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  • 2288-7407(eISSN)
한국수소및신에너지학회 (The Korean Hydrogen and New Energy Society)
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수소화기상증착공정을 이용한 마그네슘하이드라이드 미세분말 합성

Synthesis of Sub-Micron MgH2 using Hydriding Thermal Chemical Vapor Synthesis

  • 강태희 (한국세라믹기술원 이천분원) ;
  • 김진호 (한국세라믹기술원 이천분원) ;
  • 한규성 (한국세라믹기술원 이천분원) ;
  • 김병관 ((주)한국에너지재료)
  • Kang, Taehee (Korea Institute of Ceramic Engineering & Techology) ;
  • Kim, Jinho (Korea Institute of Ceramic Engineering & Techology) ;
  • Han, Kyusung (Korea Institute of Ceramic Engineering & Techology) ;
  • Kim, Byunggoan (Korea Energy Materials Co.Ltd.)
  • 투고 : 2012.09.28
  • 심사 : 2012.10.26
  • 발행 : 2012.10.31
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초록

This work describes the hydriding chemical vapor synthesis (HCVS) of the $MgH_2$ in a hydrogen atmosphere and the product's hydriding-dehydridng properties. Mg powder was used as a starting material to synthesize $MgH_2$ and uniformly heated to a temperature of $600^{\circ}C$ for Mg vaporization. The effects of hydrogen pressure on the morphology and the composition of HCVS-$MgH_2$ were examined by using X-ray diffraction (XRD) and scanning electron microscopy (SEM). It is clearly seen that after the HCVS process, the particle size of synthesized $MgH_2$ was drastically reduced to the submicron or micrometer-scale and these showed different shapes (needle-like nanofibers and angulated plate) depending on the hydrogen pressure. It was found that after the HCVS process, the $H_2$ desorption temperature of HCVS-$MgH_2$ decreased from 380 to $410^{\circ}C$, and the minimum hydrogen desorption tempreature of HCVS-$MgH_2$ powder with needle-like shape can be obtained. In addition, the enhanced hydrogen storage performance for needle-like $MgH_2$ was achieved during subsequent hydriding-dehydriding cycles.

키워드

참고문헌

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