Oxynitride glass formation from gels

Journal Article · Mon Oct 31 23:00:00 EST 1983 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1983.tb10558.x· OSTI ID:6323232

Brinker, C J; Haaland, D M

Porous, multicomponent silicate gels were heated in flowing and pressurized ammonia. These treatments resulted in dense, homogeneous oxynitride (O-N) glasses which were synthesized at low temperature (less than or equal to1000/sup 0/C) without melting. The O-N glasses exhibited increased microhardness and glass-transition temperature and altered thermal expansion characteristics compared to the respective oxide glasses prepared by densifying gels in air or by conventional melting of oxide powders. Spectroscopic evidence indicates that ammonia reacts with all of the network-formers investigated, Si, Al, and B, but from nitrogen content measurements, it appears that B and/or Al are required for significant nitridation below 1000/sup 0/C.

• Research Organization: Sandia National Laboratories, Albuquerque, New Mexico
• OSTI ID: 6323232
• Journal Information: J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 66:11; ISSN JACTA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
ADSORBENTS
ALUMINIUM
AMMONIA
BORON
CHEMICAL REACTIONS
ELEMENTS
GLASS
HARDNESS
HEAT TREATMENTS
HYDRIDES
HYDROGEN COMPOUNDS
MECHANICAL PROPERTIES
METALS
MICROHARDNESS
NITRIDATION
NITRIDES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
SEMIMETALS
SILICA GEL
SILICON
SYNTHESIS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE