Crystal phase and phonon densities of states of {beta}{prime}-SiAlON ceramics, Si{sub 6{minus}z}Al{sub z}O{sub z}N{sub 8{minus}z} (0 {le} z {le} 4)

Journal Article · Sun Dec 01 04:00:00 EST 1996 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1996.tb08102.x· OSTI ID:422733

Loong, C K; Richardson, Jr, J W ^[1]; Sukuzi, Sugura; Ozawa, Masakuni ^[2]

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1. Argonne National Lab., IL (United States). Intense Pulsed Neutron Source Div.
2. Nagoya Inst. of Tech., Gifu (Japan). Ceramics Research Lab.

The crystal structure and phonon densities of states (DOS) of {beta}{prime}-SiAlON ceramics, Si{sub 6{minus}z}Al{sub z}O{sup z}N{sub 8{minus}z} (0 {le} z {le} 4), prepared by a novel slipcast method, are studied by neutron-scattering techniques. The samples with z < 4 form a single-phase solid solution of Si-Al-O-N isostructural to {beta}-Si{sub 3}N{sub 4} (space group P6{sub 3}/m). A consistent preferential occupation of the 2c sites by oxygen atoms and the 6h sites by nitrogen atoms exists within this structure. The phonon DOS of {beta}{prime}-SiAlON displays phonon bands at {approximately}50 and 115 meV. These features are considerably broader than the corresponding ones in {beta}-Si{sub 3}N{sub 4} powder.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 422733
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 12 Vol. 79; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
CRYSTAL STRUCTURE
EXPERIMENTAL DATA
IPNS-I SYNCHROTRON
LATTICE VIBRATIONS
NEUTRON SPECTROSCOPY
PHONONS
POWDERS
SAMPLE PREPARATION
SILICON NITRIDES
SINTERING
SLIP CASTING
SLURRIES
SOLID SOLUTIONS
THERMODYNAMIC PROPERTIES
YTTRIUM OXIDES