Sulfide and Phosphide Analogs of Oxynitride Ceramics
Abstract
A survey of compositions in the GeGaPS system, initially based on the Beta-Sialon system (Si4A12O2N6) was carried out. Most of the samples were prepared by sealed tube melting (using a fused quartz tube) of mixtures of the elements in a rocking furnace. When it was found that these materials are sensitive to oxygen contamination a pressure melting system was constructed in which melts were prepared in vitreous carbon crucibles under an inert gas overpressure. There is a requirement for new materials which are transparent in the 8-14 micro meter wavelength range and have superior thermal shock resistance, toughness, mechanical strength, and abrasion resistance compared to existing materials. The purpose of this work was to evaluate the possibility of preparing sulfide-phosphide analogs of oxynitride glasses and glass ceramics in the GeGaPS system. If the silicon nitride structure could be prepared in this system, large improvements in mechanical properties are expected.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 17, 1989
- Accession Number
- ADA203805
Entities
People
- Peter J. Melling
Organizations
- Battelle Memorial Institute