The determination of structural units in amorphous Si–B–N–C ceramics by means of Si, B, N and C K–XANES spectroscopy

Franke, R.; Bender, S.; Jüngermann, Hardy; Kroschel, Matthias; Jansen, Martin

doi:10.1016/s0368-2048(98)00328-4

Cited by 29 publications

(16 citation statements)

References 12 publications

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“…The B K-edge XANES spectra of Si 3 B 3 N 7 , cubic BN (c-BN), and hexagonal BN (h-BN) are shown in Figure 3 a. [38,39] While the spectrum of h-BN is dominated by a strong 1s!p* resonance at 191.8 eVand a doublet at 198 eV (1s!s* resonances), in the spectrum of c-BN, the 1s!p* Figure 3. a) B K-edge XANES spectra of Si 3 B 3 N 7 , c-BN, and h-BN.…”

Section: Short-range Ordermentioning

confidence: 99%

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The Route to the Structure Determination of Amorphous Solids: A Case Study of the Ceramic Si₃B₃N₇

2006

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Si(3)B(3)N(7) is the parent compound of a new class of amorphous ceramics containing silicon, boron, nitrogen, and carbon that display a unique spectrum of properties. It consists of a random network in which the constituent elements are linked by predominantly covalent bonds. Similarly to quartz glass, the composition of amorphous Si(3)B(3)N(7) is virtually stoichiometric. As all three of its constituent elements can serve as the objects of various structural probes, Si(3)B(3)N(7) was selected as the basis of a systematic structural investigation, in which methods for the structure determination of solids without translational symmetry could be validated and improved. However, as the complete amorphous structure cannot be deduced from experimental data, these results must be complemented by computer simulations. Thus, five classes of structure models were generated and compared to experimental results. Only the models generated by following the actual synthesis route as closely as possible agreed well with the experimental data.

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Section: Short-range Ordermentioning

confidence: 99%

“…a) B K-edge XANES spectra of Si 3 B 3 N 7 , c-BN, and h-BN. [38,39] b) Si K-edge XANES spectra of Si 3 B 3 N 7 , a-Si 3 N 4 , and b-Si 3 N 4 . [40] c) N K-edge XANES spectra of Si 3 B 3 N 7 , a-Si 3 N 4 , and h-BN.…”

Section: Short-range Ordermentioning

confidence: 99%

The Route to the Structure Determination of Amorphous Solids: A Case Study of the Ceramic Si₃B₃N₇

2006

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“…In Abbildung 3 a ist das B‐K‐XANES‐Spektrum für die Titelverbindung den entsprechenden Spektren für hexagonales (h‐BN) und kubisches Bornitrid (c‐BN) gegenübergestellt 38. 39 Während das Spektrum von h‐BN von einer starken 1s→π*‐Resonanz bei 191.8 eV und einem Dublett um 198 eV (1s→σ*‐Resonanzen) dominiert wird, fehlt die 1s→π*‐Resonanz im Spektrum von c‐BN. Bei c‐BN steht dagegen die starke B‐1s→σ*‐Resonanz bei 198 eV im Vordergrund.…”

Section: Experimentelle Ansätze Zur Bestimmung Charakteristischer unclassified

“… a) B‐K‐XANES‐Spektren von Si 3 B 3 N 7 , h‐BN und c‐BN;38, 39 b) Si‐K‐XANES‐Spektren von Si 3 B 3 N 7 , α‐Si 3 N 4 und β‐Si 3 N 4 ;40 c) N‐K‐XANES‐Spektrum von Si 3 B 3 N 7 , α‐Si 3 N 4 und h‐BN. …”

Section: Experimentelle Ansätze Zur Bestimmung Charakteristischer unclassified

Der Weg zur Struktur amorpher Festkörper – eine Studie am Beispiel der Keramik Si₃B₃N₇

2006

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Si3B3N7 ist die Basisverbindung einer neuen Klasse amorpher Keramiken aus Si, B, N und C mit einem einzigartigen Eigenschaftsspektrum. Es bildet ein ungeordnetes Netzwerk, in dem die konstituierenden Elemente überwiegend kovalent aneinander gebunden sind. Wie bei Quarzglas ist die Zusammensetzung von a‐Si3B3N7 nahezu stöchiometrisch. Da alle drei konstituierenden Elemente als Aufatome für strukturempfindliche Sonden fungieren können, wurde Si3B3N7 als Grundlage für systematische Strukturuntersuchungen herangezogen, wobei insbesondere die Verfahren für die Strukturbestimmung bei festen Stoffen ohne Translationssymmetrie erprobt und verbessert werden sollten. Allerdings kann aus experimentellen Ergebnissen nicht die komplette amorphe Struktur abgeleitet werden, weshalb sie durch Computersimulationen überprüft und ergänzt werden müssen. Dazu wurden fünf Familien von Strukturmodellen erzeugt und mit den experimentellen Ergebnissen verglichen. Nur solche Modelle korrelierten gut mit dem Experiment, die bei ihrer Generierung so nahe wie möglich dem tatsächlichen Syntheseweg folgten.

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“…structure in the B-C-N films. The feature centered at ϳ399.8 eV and the relatively broad feature centered at ϳ407 eV are attributable to * and * resonances,8 respectively. The broadness of the * and * features suggests the presence of various bonding environments around the N atoms in B-C-N. Ripalda et al attributed the broad feature centered at ϳ413 eV ͑marked as N 1 ) to the * resonance related to the NvC double bond 9.…”

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confidence: 98%

Electronic and bonding structures of B-C-N thin films investigated by x-ray absorption and photoemission spectroscopy

Ray

Tsai

Bao

et al. 2004

Journal of Applied Physics

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X-ray absorption near-edge structure ͑XANES͒ and valence-band photoelectron spectroscopy ͑PES͒ were used to investigate the electronic and bonding structures of B-C-N thin films. The intensities of the sp 2-bonded features in the C K-edge XANES spectra are found to generally decrease as the C concentration increases, whereas the intensities of the sp 2-bonded features in the spectra of N K-edge XANES increase with the N concentration. The decrease of the intensities of the sp 2-bonded features in the C and N K-edges XANES spectra correlates with the increase of the C/B and N/B concentration ratios and the increase of Young's modulus. Valence-band PES spectra are found to be insensitive to the variations of the B and C concentrations in B-C-N compounds

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The determination of structural units in amorphous Si–B–N–C ceramics by means of Si, B, N and C K–XANES spectroscopy

Cited by 29 publications

References 12 publications

The Route to the Structure Determination of Amorphous Solids: A Case Study of the Ceramic Si₃B₃N₇

The Route to the Structure Determination of Amorphous Solids: A Case Study of the Ceramic Si₃B₃N₇

Der Weg zur Struktur amorpher Festkörper – eine Studie am Beispiel der Keramik Si₃B₃N₇

Electronic and bonding structures of B-C-N thin films investigated by x-ray absorption and photoemission spectroscopy

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The determination of structural units in amorphous Si–B–N–C ceramics by means of Si, B, N and C K–XANES spectroscopy

Cited by 29 publications

References 12 publications

The Route to the Structure Determination of Amorphous Solids: A Case Study of the Ceramic Si3B3N7

The Route to the Structure Determination of Amorphous Solids: A Case Study of the Ceramic Si3B3N7

Der Weg zur Struktur amorpher Festkörper – eine Studie am Beispiel der Keramik Si3B3N7

Electronic and bonding structures of B-C-N thin films investigated by x-ray absorption and photoemission spectroscopy

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The Route to the Structure Determination of Amorphous Solids: A Case Study of the Ceramic Si₃B₃N₇

The Route to the Structure Determination of Amorphous Solids: A Case Study of the Ceramic Si₃B₃N₇

Der Weg zur Struktur amorpher Festkörper – eine Studie am Beispiel der Keramik Si₃B₃N₇