Phase Transition and Morphology of NaCl Aerosol Particles

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Other Title
  • ＮａＣｌエアロゾル粒子の相変化とモルフォロジー

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Description

The effects of relative humidity on the water content and the morphology of NaCl aerosol were investigated by infrared spectroscopy. NaCl droplets with the median diameter 0.35μm were prepared by atomizing 26.69g/l of aqueous NaCl solution at ambient condition. Two types of experiment under controlled relative humidity were carried out. One is humidification of dried aerosols containing dry NaCl particles, and the other is dehumidification of wet aerosols containing saline droplets. At a humidity above the deliquescence point during humidification of dry aerosols as well as above the crystallization point during the dehumidification of wet aerosols, NaCl aerosols containing aqueous droplets followed the hygroscopic growth curve. At a humidity below these phase transition points, NaCl aerosols were composed of the polycrystalline particles together with saline water. These results suggest that the morphology of salt aerosols may vary with the history of their surrounding conditions.

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Details 詳細情報について

  • CRID
    1390001204512527616
  • NII Article ID
    130003778008
  • DOI
    10.4164/sptj.45.305
  • ISSN
    18837239
    03866157
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
    • OpenAIRE
  • Abstract License Flag
    Disallowed

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