Crystallization of Nanocomposite Glasses Made by the SSG Process
Abstract
The present research builds in two different directions on the major discovery made under the AFOSR support of the phenomenon of solid state epitaxy. The first goal of the current research is to explore the role of solid state epitaxy in the crystallization of a very much wider range of glass composition to make glass ceramics. The nanocomposite xerogel route is being utilized to attempt to make a universal glass-ceramic with controllable crystallization. Isostructural seeding of cordierite glass led to a lowering in crystallization temperature due to epitaxy just as in the nucleated crystallization of ceramics. Experiments with other system such as Lithium Aluminum Silicate and Lithium Aluminum Disilicate are in progress and preliminary results show that solid state epitaxy is lowering the crystallization temperatures. The second area of current research is to extend the validity of solid state epitaxy proven by the growth of alumina films of alpha AL2O3 single crystals is being extended to other oxides, metals and semiconductors. Epitaxial crystallization of silicon (oxy)carbide glasses such as Nicalon compositions is being investigated in addition to the oxide glasses and gels.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1989
- Accession Number
- ADA214572
Entities
People
- Rustum Roy
- Sridhar Komarneni
Organizations
- Pennsylvania State University