Progress in Superconductivity and Cryogenics (한국초전도ㆍ저온공학회논문지)

The Korean Society of Superconductivity and Cryogenics (한국초전도저온학회)
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Synthesis of $MgB_2$ powders by ultrasonic spray pyrolysis

초음파 분무열분해를 이용한 $MgB_2$ 분말 합성

  • 박성창 (경상대 대학원 세라믹공학과) ;
  • 임영진 (경상대 대학원 세라믹공학과) ;
  • 강성구 (경상대 대학원 세라믹공학과) ;
  • 정준기 (창원대학교 산업기술 연구원) ;
  • 김찬중 (한국원자력연구원) ;
  • 김철진 (경상대 대학원 세라믹공학과)
  • Published : 2008.03.31
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Abstract

Spherical $MgB_2$ powders was synthesized with the ultrasonic spray pyrolysis(USP) process using aqueous solutions of boron and magnesium ion. The properties of synthesized $MgB_2$ powder were characterized by XRD, SEM and EDS. A small amount of MgO was detected as the secondary phase out of the synthesized powder and the ratios of $MgB_2$ to MgO increased with increasing furnace temperature. The particle size and morphology of $MgB_2$ powder were investigated with varying molar concentration of the boron and magnesium solution and furnace temperature between $600^{\circ}C$ and $1000^{\circ}C$ in $Ar/H_2$. The average particle size of $MgB_2$ showed narrow distribution ranging from 300nm to 400nm. The morphology of particles exhibited mostly spherical shapes and uniform distribution.

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References

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