한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제41권4호
  • /
  • Pages.174-179
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  • 2008
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지
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초음파분무열분해법에 의한 나노 텅스텐 분말의 형성 및 특성에 관하여

The Characteristics and Formation of Tungsten Nano-Powder by Ultrasonic Spray Pyrolysis Method

  • 이호진 (단국대학교 신소재공학과) ;
  • 윤중현 (단국대학교 신소재공학과) ;
  • 최진일 (단국대학교 신소재공학과)
  • Lee, Ho-Jin (Department of Advanced Materials Science and Engineering, Dankook University) ;
  • Yoon, Jung-Hyun (Department of Advanced Materials Science and Engineering, Dankook University) ;
  • Choe, Jean-Il (Department of Advanced Materials Science and Engineering, Dankook University)
  • 발행 : 2008.08.31
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초록

Nanosize tungsten powder was synthesized by ultrasonic spray pyrolysis method through a solution containing ammonium metatungstate hydrate $[(NH_4)_6W_{12}O_{39}{\cdot}H_2O]$ and reduction treatment. It was expected the improvement of mechanical properties due to increasing surface free energy and surface activity. Starting solutions with each concentration, reaction temperature and reduction treatment were significantly influenced on the formation of tungsten size and phase. It was found that particle size was decreased with concentration of starting solution and surface tension were decreased. The particle size was increased at thermal decomposition temperature above $600^{\circ}C$ by neck growth of interparticles. Tungsten particles were formed by reduction reaction in atmosphere of hydrogen gas at the temperature above $700^{\circ}C$.

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