Preparation and properties of yttrium-silicon-aluminum oxynitride glasses
Glasses containing up to 7 at. % nitrogen were prepared in the system Y-Si-Al-O-N. The glass transition temperature, hardness, and relative fracture toughness increase and the thermal expansion coefficient decreases with increasing nitrogen content. Weight losses after 350 h in 95/sup 0/C distilled water are not simply related to nitrogen content, but for some compositions they are half that reported for fused silica. The electrical conductivity at 548/sup 0/C and 10 kHz is 7.8 x 10/sup -10/ (..cap omega...cm)/sup -1/ for one composition. Fourier transform ir spectroscopic analysis indicates the presence of Si-N bonds in the glasses. The data suggest that nitrogen substitutes for oxygen in the glass network to produce a more highly cross-linked structure.
- Research Organization:
- Sandia Labs., Albuquerque, NM
- DOE Contract Number:
- AT(29-1)-789
- OSTI ID:
- 5582592
- Journal Information:
- J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 62:9-10; ISSN JACTA
- Country of Publication:
- United States
- Language:
- English
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360204 -- Ceramics
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ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BONDING
CHALCOGENIDES
CHEMICAL PREPARATION
CRYOGENIC FLUIDS
ELECTRICAL PROPERTIES
ELEMENTS
EXPANSION
FABRICATION
FLUIDS
GLASS
HARDNESS
JOINING
MECHANICAL PROPERTIES
MELTING
NITROGEN
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SEMIMETALS
SILICON
SILICON COMPOUNDS
SILICON OXIDES
SYNTHESIS
THERMAL EXPANSION
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES