Matter
Name
Na-Al-silicate glass with Al(Al+Si)=0.25
Family
solid
Level
local matter
Origins
laboratory
Provider
Astrophysical Institute and University Observatory Jena
Preparation
selected components
Method
selection of homogeneous glassy parts under microscope inspection
Phase type
solid
Texture
compact glassy
Type of porosity
closed pores
Density
2.36 $\pm$ 0.03 $g.cm^{-3}$
Grain density
2.36 $\pm$ 0.03 $g.cm^{-3}$
Oxides
Formula $Na_{2}O$ $Al_{2}O_{3}$ $SiO_{2}$
Mass fraction (%) 0.108 0.191 0.681
Number
1
Mode of mixing
single material
Materials
  Name Arrangement Mass (g) Mass fraction Abundance comments
Na-Al-silicate glass with Al(Al+Si)=0.25 1.0
Title
Melting and quenching by flowing water

Produced matter

Matter
Na-Al-silicate glass with Al(Al+Si)=0.25 (this matter)
Processing steps
Step Date Type Process Changes
#1 mixing sodium carbonate, aluminium oxide, and silicon dioxide are mixed in appropriate portions
#2 thermal filled in platinum crucible, slowly heated by a resistance furnace to 1823-1923 K, maintained for 1 hour
#3 thermal quenched to room temperature by contact with flowing water
#4 thermal melting and quenching was repeated to reduce the number of bubbles
#5 mechanical pieces of glass up to 1 cm in diameter were broken out of the crucible content