Abstract

Abstract X-ray absorption near edge structure (XANES) measurements at the Si, B, N and C K-edges of amorphous Si–B–N–C ceramics were performed to study the local atomic structure. Recorded spectra of samples synthesized by a Si-organopolymer synthesis route show the presence of (SiN 4 ), (SiN x C y ), (BN 3 ), (NSi x B y ), and (C=C) structural units. The quantitative content of these units depends on the chemical constitution of the precursor molecules and the reaction conditions.

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