한국재료학회지 (Korean Journal of Materials Research)

  • 제12권5호
  • /
  • Pages.391-397
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  • 2002
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  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
권호 표지
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Sodium Flame Encapsulation 방법에 의한 초미립 Ti 분말 합성 및 공정개발

Synthesis and Process Development of Ultrafine Ti Powder by Sodium Flame Encapsulation Method

  • 맹덕영 (한국원자력연구소 원자력재료기술개발팀) ;
  • 이창규 (한국원자력연구소 원자력재료기술개발팀) ;
  • 김흥희 (한국원자력연구소 원자력재료기술개발팀)
  • Maeng, Deok-Yeong (Nuclear Fuel Technology Center, Korea Atomic Energy Research Institute) ;
  • Lee, Chang-Gyu (Nuclear Fuel Technology Center, Korea Atomic Energy Research Institute) ;
  • Kim, Heung-Hui (Nuclear Fuel Technology Center, Korea Atomic Energy Research Institute)
  • 발행 : 2002.05.01
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초록

Synthesis and process development of nano-size Ti powder by SFE(Sodium/halide Flame Encapsulation) method were investigated. Four concentric coflow burner was used and its flame configuration was $TiCl_4/Ar/Na/Ar$ in order from the center. Flame has been controlled by the various processing parameters such as temperature of burner and flow rates of both $TiCl_4$(g) precursor and Na(g). It was found that yellow-colored flame was shown in the flow rates of 70cc/min of $TiCl_4$(g) precursor and 2 $\ell$ /min of Na(g) which were regarded as optimum flame condition. The powders encapsuled by NaCl were produced having the average powder size of 250nm. The results of X-ray diffraction showed that powders from the optimized condition consisted of pure Ti and NaCl. TEM analysis confirmed that the several Ti powders of 20-100nm were encapsulated with NaCl. After removing sodium chloride by heat treatment, the spherical Ti powders with the size range of 80 to 150nm were obtained.

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