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Intermediate‐Range Order in Amorphous Nitridic Ceramics: Lessons from Modern Solid‐State NMR Spectroscopy
Author(s) -
van Wüllen Leo,
Müller Utz,
Jansen Martin
Publication year - 2000
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20000717)39:14<2519::aid-anie2519>3.0.co;2-g
Subject(s) - boron , amorphous solid , silicon , nuclear magnetic resonance spectroscopy , spectroscopy , solid state nuclear magnetic resonance , ceramic , materials science , homogeneous , crystallography , coordination sphere , amorphous silicon , range (aeronautics) , chemical physics , chemistry , nuclear magnetic resonance , crystalline silicon , crystal structure , physics , stereochemistry , organic chemistry , thermodynamics , metallurgy , quantum mechanics , composite material
Boron‐ and silicon‐rich islands , connected through B‐N‐Si linkages, characterize the network structure of the amorphous model ceramic Si 3 B 3 N 7 , obtained from a single‐source precursor, on an intermediate length scale (2–5 Å), as determined by double‐resonance solid‐state NMR spectroscopy. Only 1.35±0.2 silicon atoms are found in the second coordination sphere of the boron atoms, not three, as expected from an atomically homogeneous distribution.