High Temperature IR Glasses.
Abstract
The introduction of Ag in Si-As-Te glasses permits the incorporation of Se, otherwise volatile and, or degradable as a constituent in Si-containing chalcogenide glasses. Si-As-Ag-Te-Se glasses exhibit much higher softening ranges and glass transition temperatures than encountered in known chalcogenide systems. A glass Si(35)As(15)Ag(10)Te(20)Se(20) had the viscosity log eta=13 at about 500C, as compared to 370C for the base glass Si(35)As(25)Te(40), the viscosity of log eta=9.8 at about 560C, as compared to 442C for the base glass Si(35)As(25)Te(40). Phase separation occurs in the system Si-As-Ag-Te-Se and becomes manifest in two glass transitions indicated by changes in the slopes of the expansion curves and breaks in the softening point-composition relations. The existence and behavior of Si-As-Ag-Te-Se glasses suggests the possible development of higher Tg ir transparencies and higher Tg low band gap semiconductor glasses than described so far. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1972
- Accession Number
- AD0749958
Entities
People
- Henry E. Anthonis
- Norbert J. Kreidl
- Werner Ratzenbock
Organizations
- Missouri University of Science and Technology