High Temperature IR Glasses.
Abstract
Glasses in the system Si-As-Ag-Te-Se were found to have much higher softening temperatures than any chalcogenide glasses previously investigated. One heat treated glass had a softening temperature of 670C, which is 220 degrees higher than that of the Si-As-Se base glass. Ir transmission in relevant ranges was essentially maintained. Ag is instrumental in allowing the introduction of Se otherwise rejected in silicon chalcogenide glasses. The development of microstructure is more important than the intended increase in average bonding by the substitution of Se for Te. The microstructure involves glass-glass phase separation, with one of the phases having a much higher Tg, and, possibly, some microcrystallinity. (Modified author abstract)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1973
- Accession Number
- AD0767783
Entities
People
- Norbert J. Kreidl
Organizations
- Missouri University of Science and Technology