Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Generation of Nano/Submicron Particles Using an Electrically Heated Tube Furnace

전기가열 튜브로를 이용한 나노/서브마이크론 입자의 발생

  • 지준호 (연세나노과학기술연구단) ;
  • 배양일 (연세대학교 대학원 기계공학과) ;
  • 황정호 (한국과학기술연구원 지구환경연구센터) ;
  • 배귀남 (연세대학교 기계공학과)
  • Published : 2003.12.01
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Abstract

Aerosol generator using an electrically heated tube furnace is a stable apparatus to supply nanometer sized aerosols by using the evaporation and condensation processes. Using this method, we can generate highly concentrated polydisperse aerosols with relatively narrow size distribution. In this work, characteristics of particle size distribution, generated from a tube furnace, were experimentally investigated. We evaluated effects of several operation parameters on particle generation: temperature in the tube furnace, air flow rates through the tube, size of boat containing solid sodium chloride(NaCl). As the temperature increased, the geometric mean diameter increased and the total number concentration also increased. Dilution with air affected the size distribution of the particles due to coagulation. A smaller sized boat, which has small surface area to contact with air, brings smaller particles of narrow size distribution in comparison of that of a larger boat. Finally, we changed the electrical mobility diameter of aggregate sodium chloride particles by varying relative humidity of dilution air, and obtained non-aggregate sodium chloride particles, which are easy to generate exact monodisperse particles.

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References

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