Matter
- Name
- Na-Al-silicate glass with Al(Al+Si)=0.25
- Family
- solid
- Database
- Experimentalists
- 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
- Title
- Melting and quenching by flowing water
- 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