Matter
Name
CO2 frost
Family
Family
solid
Database
Experimentalists
Level
from laboratory repository
Origins
laboratory
Provider
Space Research and Planetary Sciences Division, University of Bern
Provider reference code
CO2_frost
Image
Optical microscope image of a fresh CO2 frost sample following its production
Preparation
raw
Method
Adiabatic expansion and cooling of pressurized CO2 using a FrigimatTM JR Dry Ice Maker (Bel-ArtTM SP Scienceware TM)
Storage condition
liquid nitrogen
Phase type
solid
Shape
fluffy 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 10.0 ${\mu}m$ 100.0 ${\mu}m$ 100.0 $\pm$ 10.0 spherical
Size method
Optical inspection with microscope
Number
1
Mode of mixing
single material
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
CO2 frost 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
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