| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1484888 | Journal of Non-Crystalline Solids | 2008 | 5 Pages |
Abstract
Heat treatment of sodium silicate water glass of the nominal composition Na2O/SiO2 = 1:3 was carried out from 100 °C up to 800 °C and the advancement of the resulting phases was followed up by powder X-ray diffraction, scanning electron microscopy and thermogravimetry along with differential thermal analysis. The water glass, initially being an amorphous solid, starts to form crystals of β-Na2Si2O5 at about 400 °C and crystallizes the SiO2 modification cristobalite at about 600 °C that coexists along with β-Na2Si2O5 up to 700 °C. At 750 °C Na6Si8O19 appears as a separate phase and beyond 800 °C, the system turns into a liquid.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Raghavan Subasri, Helfried Näfe,