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Oxidation curing mechanism of polycarbosilane fibres by solid-state29Si high-resolution NMR

โœ Scribed by T. Taki; S. Maeda; K. Okamura; M. Sato; T. Matsuzawa

Publisher
Springer
Year
1987
Tongue
English
Weight
188 KB
Volume
6
Category
Article
ISSN
0261-8028

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High-resolution solid-state 29Si NMR of
High-resolution solid-state 29Si NMR of polymorphs of Ca2SiO4
โœ A.-R. Grimmer; F. von Lampe; M. Mรคgi; E. Lippmaa ๐Ÿ“‚ Article ๐Ÿ“… 1985 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 337 KB

High-resolution solid-state 29Si NMR spectra of four (Y, 8, e~ and e) polymorphs of Ca2SiO 4 have been measured. The isotropic silicon 29Si chemical shifts lie between -73.5 and -70.1 ppm, and increasing coordination number of calcium leads to low-field 29Si shifts. The 29Si shifts in combination wi