Matter
- Name
- Spherical particles (67±31 μm diameter) of salty water ice produced by freezing droplets of a 15 wt.% Na2SO4 solution in liquid nitrogen
- Family
- solid
- Database
- Experimentalists
- Origins
- laboratory
- Provider
- Space Research and Planetary Sciences Division, University of Bern
- Preparation
- raw
- Method
- Nebulization of the salt solution and freezing by deposition in liquid nitrogen
- Phase type
- solid
- Shape
- granular powder
- Texture
- loose granular
- Type of porosity
- particulate
- Texture
- compact
- Grain sizes
-
Grains Size min Size max Size median Size width Size mass fraction Grain shape #1 30.0 ${\mu}m$ 40.0 ${\mu}m$ 0.03 spherical #2 40.0 ${\mu}m$ 50.0 ${\mu}m$ 0.21 spherical #3 50.0 ${\mu}m$ 60.0 ${\mu}m$ 0.31 spherical #4 60.0 ${\mu}m$ 70.0 ${\mu}m$ 0.13 spherical #5 70.0 ${\mu}m$ 80.0 ${\mu}m$ 0.11 spherical #6 80.0 ${\mu}m$ 90.0 ${\mu}m$ 0.06 spherical #7 90.0 ${\mu}m$ 100.0 ${\mu}m$ 0.02 spherical #8 100.0 ${\mu}m$ 110.0 ${\mu}m$ 0.02 spherical #9 110.0 ${\mu}m$ 120.0 ${\mu}m$ 0.05 spherical #10 120.0 ${\mu}m$ 130.0 ${\mu}m$ 0.01 spherical #11 130.0 ${\mu}m$ 140.0 ${\mu}m$ 0.0 spherical #12 140.0 ${\mu}m$ 150.0 ${\mu}m$ 0.01 spherical #13 150.0 ${\mu}m$ 160.0 ${\mu}m$ 0.01 spherical #14 160.0 ${\mu}m$ 170.0 ${\mu}m$ 0.01 spherical - Size method
- Manual counting on cryo-Scanning Electron Microscopy images of fresh ice particles
- Title
- Preparation procedure
- Matter
- Spherical particles (67±31 μm diameter) of salty water ice produced by freezing droplets of a 15 wt.% Na2SO4 solution in liquid nitrogen (this matter)
- Processing steps
-
Step Date Type Process Changes #1 fluid physical The salt solution is prepared by dissolving at ambient temperature the required amount of salt in deionized water. Spherical liquid water droplets are formed. #2 mechanical The liquid solution is injected into a sonotrode and spread out as a thin film on the conical shaped nozzle surface at the output of the sonotrode. Ultrasonic vibrations delivered to the sonotrode nozzle disintegrate the liquid into micro-droplets. Spherical liquid water droplets are formed. #3 thermal The droplets of deionized/ultra-pure water, initially liquid, undergo solidification as they contact the liquid nitrogen Spherical water ice particles are formed.