Matter
Name
Water ice spherical particles 4.5±2.5 μm
Family
Family
solid
Database
Experimentalists
Origins
laboratory
Provider
Space Research and Planetary Sciences Division, University of Bern
Provider reference code
SPIPA-A
Image
Scanning-electron-microscope micrographs of water ice particles. Fresh sample produced by direct spraying on a cold plate. The particles of the uppermost layer show some frost condensation (white chips on the surface of the spherical ice particles). The shape of the particles is almost perfectly spherical.
Preparation
raw
Method
Nebulization of liquid water and freezing by deposition of cold substrate
Phase type
solid
Shape
fluffy powder
Texture
pulverulent
Type of porosity
porous
Texture
compact
Grain sizes
Grains Size min Size max Size median Size width Size mass fraction Grain shape
#1 0.0 μm 1.0 μm 0.01 spherical
#2 1.0 μm 2.0 μm 0.1 spherical
#3 2.0 μm 3.0 μm 0.14 spherical
#4 3.0 μm 4.0 μm 0.23 spherical
#5 4.0 μm 5.0 μm 0.22 spherical
#6 5.0 μm 6.0 μm 0.08 spherical
#7 6.0 μm 7.0 μm 0.08 spherical
#8 7.0 μm 8.0 μm 0.04 spherical
#9 8.0 μm 9.0 μm 0.03 spherical
#10 9.0 μm 10.0 μm 0.01 spherical
#11 10.0 μm 11.0 μm 0.02 spherical
#12 11.0 μm 12.0 μm 0.02 spherical
#13 12.0 μm 20.0 μm 0.03 spherical
Size method
Manual counting on cryo-Scanning Electron Microscopy images of fresh ice particles
Number
1
Mode of mixing
single material
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
Water ice spherical particles 4.5±2.5 μm 1.0
Title
Nebulization of liquid water droplets and freezing on a cold plate

Produced matter

Matter
Water ice spherical particles 4.5±2.5 μm (this matter)
Processing steps
Step Date Type Process Changes
#1 mechanical Liquid water droplets are produced using an ultrasonic nebulizer (Hippomed AIR ONE).
#2 thermal The droplets of deionized/ultra-pure water, initially liquid, undergo solidification as they enter the freezer and sediment onto the cold substrate.
Publications