Si sub 3 N sub 4 by the carbothermal ammonolysis of silica

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Advanced Ceramic Materials; (USA)

DOI:https://doi.org/10.1111/j.1551-2916.1988.tb00167.x· OSTI ID:5998527

Durham, B G; Murtha, M J; Burnet, G ^[1]

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1. Ames Lab., IA (USA)

Si{sub 3}N{sub 4} powder was produced by the carbothermal ammonolysis of fumed SiO{sub 2} at 1,300{degree} to 1,400{degree}C for 6 h in a flow reactor. Powders consisting of 95% Si{sub 3}N{sub 4} with only 46% O{sub 2} were obtained and were primarily {alpha}-phase and uniform in particle shape and size (2 {mu}m). A comparison of the systems SiO{sub 2}-C-NH{sub 3} and the SiO-{sub 2}-C-N{sub 2} showed higher reaction rates when NH{sub 3} was used because of its dissociation to form active forms of hydrogen and nitrogen.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5998527
• Journal Information: Advanced Ceramic Materials; (USA), Journal Name: Advanced Ceramic Materials; (USA) Vol. 3:1; ISSN 0883-5551; ISSN ACEME
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
AMMONOLYSIS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
DECOMPOSITION
EXPERIMENTAL DATA
INFORMATION
MEASURING METHODS
MINERALS
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PNICTIDES
POWDERS
SILICA
SILICON COMPOUNDS
SILICON NITRIDES
SILICON OXIDES
SOLVOLYSIS
SYNTHESIS
VERY HIGH TEMPERATURE