The densification behavior of a sol-gel processed silica was studied. Thermogravimetric weight loss analysis was used to study dehydration. Gas (He) pycnometry was used to measure skeletal density and to estimate an apparent fictive temperature. Isothermal shrinkage data were used to calculate apparent viscosities. Isothermal changes in apparent viscosity are due to dehydration and skeletal relaxation. Shrinkage data from step heat treatments were used to separate the effects of relaxation from those of dehydration.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry