Synthesis and magic-angle spinning nuclear magnetic resonance of sup 15 N-enriched silicon nitrides

Journal Article · · Chemistry of Materials; (USA)

OSTI ID:6669174

Harris, R K; Leach, M J ^[1]; Thompson, D P ^[2]

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1. Univ. of Durham (England)
2. The University, Newcastle upon Tyne (England)

The synthesis of {alpha}-Si{sub 3}{sup 15}N{sub 4} by nitridation of silicon powder using a {sup 15}N{sub 2}/H{sub 2} mix and the conversion to {beta}-Si{sub 3}{sup 15}N{sub 4} are described. The {sup 15}N NMR spectra of these two solid phases have been obtained, and they broadly correlate with the crystal structures. The {sup 15}N shift range for the {alpha}-polymorph covers nearly 25 ppm, suggesting that the sensitivity of the {sup 15}N chemical shift to structural factors may be greater than that of {sup 29}Si shifts.

• OSTI ID: 6669174
• Journal Information: Chemistry of Materials; (USA), Journal Name: Chemistry of Materials; (USA) Vol. 2:3; ISSN CMATE; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CERAMICS
CRYSTAL STRUCTURE
DATA ANALYSIS
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MEASURING METHODS
MICROSTRUCTURE
NITRIDES
NITROGEN 15
NITROGEN COMPOUNDS
NITROGEN ISOTOPES
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
PNICTIDES
SILICON COMPOUNDS
SILICON NITRIDES
SPECTRA
STABLE ISOTOPES
SYNTHESIS