sup 29 Si NMR characterization of. alpha. - and. beta. -silicon nitride

Journal Article · Wed Jun 06 04:00:00 EDT 1990 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00168a008· OSTI ID:6883407

Carduner, K R ^[1]; Blackwell, C S ^[2]; Hammond, W B; Reidinger, F; Hatfield, G R ^[3]

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1. Ford Motor Company, Dearborn, MI (USA)
2. Union Carbide Corporation, Tarrytown, NJ (USA)
3. Allied-Signal, Inc., Morristown, NJ (USA)

Fine structure in the {sup 29}Si MAS NMR spectra of Si{sub 3}N{sub 4} has been observed, prompting a reevaluation of the current interpretation of Si{sub 3}N{sub 4} spectra. On the basis of variable field studies, this fine structure indicates the presence of quadrupole-perturbed residual dipolar coupling to {sup 14}N. This is apparently the first such observation in {sup 29}Si NMR. The peaks in the spectra of {alpha}- and {beta}-Si{sub 3}N{sub 4} are shown to arise from differences in the non-nearest-neighbor environments. Arguments based on a sphere of influence approach appear to be an attractive interpretive tool for these and similar ceramic materials. Some speculation is also presented concerning the relationship between the {sup 29}Si-{sup 14}N splitting and the structure of Si{sub 3}N{sub 4}.

• OSTI ID: 6883407
• Journal Information: Journal of the American Chemical Society; (USA), Journal Name: Journal of the American Chemical Society; (USA) Vol. 112:12; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CERAMICS
DATA
DATA ANALYSIS
EXPERIMENTAL DATA
FINE STRUCTURE
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
NITRIDES
NITROGEN COMPOUNDS
NMR SPECTRA
NUMERICAL DATA
PNICTIDES
SILICON COMPOUNDS
SILICON NITRIDES
SPECTRA