A Coexistence of Boron Nitride and Boric Oxide

Hubác̆ek, Milan; Satô, Tadao; Ishii, T.

doi:10.1006/jssc.1994.1117

Cited by 71 publications

(41 citation statements)

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“…There are several reports in the literature characterizing the formation and structure of h-BN by IR spectroscopy [6,7]. A typical IR spectrum of h-BN contains three main absorption peaks at B3550, B1430 and, B800 cm À1 .…”

Section: Resultsmentioning

confidence: 99%

The effect of transition metals on the structure of h-BN intercalation compounds

Budak

Bozkurt

2004

Journal of Solid State Chemistry

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Section: Resultsmentioning

confidence: 99%

The effect of transition metals on the structure of h-BN intercalation compounds

Budak

Bozkurt

2004

Journal of Solid State Chemistry

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“…The bands at 1100 and 920 cm À1 could be attributed to tetrahedral B units [17] of boron oxynitride (B-N-O) species. [18] Although the two bands become less intense with a temperature increase, the B-N-O bond at $1100 cm À1 is still observable. FTIR examinations indicate that the impurities in the as-prepared products are C, H, and O, and the first two elements can be effectively removed by increasing the CVD temperature.…”

Section: Nt204: Nearly Monodispersed Bn Particles Synthesized By a Trmentioning

confidence: 98%

Synthetic Routes and Formation Mechanisms of Spherical Boron Nitride Nanoparticles

Tang

Bando

Huang

et al. 2008

Adv Funct Materials

214

162

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A new concept is proposed to explain the formation of spherical boron nitride (BN) nanoparticles synthesized by the chemical vapor deposition (CVD) reaction of trimethoxyborane (B(OMe)3) with ammonia. The intermediate phases formed during the CVD under different reaction conditions are analyzed by X‐ray diffraction, electron microscopy, thermogravimetry, and spectroscopy techniques. The transition mechanism from an intermediate B(OMe)3–xH3–xN (x < 2) phase having single BN bonds to the BN nanoparticles is elucidated. This particularly emphasizes the CVD temperature effect governing the conversion of the NH···OB hydrogen bonds in (OMe)3B · NH3 into the NB bonds in B(OMe)3–xH3–xN. The spherical morphology strongly depends on the remnant impurity oxygen formed upon Me2O group elimination in the intermediate. Two types of spherical BN nanoparticles primarily attractive for immediate commercialization (with C and H impurities at a level less than 1 wt %) are synthesized by the adjustment of experimental parameters: high oxygen‐containing (∼6.3 wt %) BN spheres with a diameter of ∼90 nm and a specific surface area of 26.8 m2 g−1; and low oxygen‐containing (<1 wt %) BN spheres with a diameter of ∼30 nm and a surface area of 52.7 m2 g−1. Finally, the regarded synthetic techniques are fully optimized in the present work.

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“…[27][28][29] On the other hand, no indication for the presence of crystalline boric oxide with diffraction peaks at 2θ = 13.58°and 27.98°is seen in the diffraction patterns shown in Figure 3. A removal of the oxygen impurities, coinciding with the growth and ordering of the BN layers to form crystalline BN, requires temperatures above 1350°C.…”

Section: Resultsmentioning

confidence: 76%

“…The slightly higher value for the d spacing in samples containing turbostratic BN compared to well-ordered hexagonal BN is consistent with the layer disorder in these samples, and several subpolytypes of turbostratic BN have been discussed in the literature. [27] On the other hand, the two-dimensional (10) reflection can be used to calculate the width of the crystallite layer. However, in the diffraction patterns of the BN-coated MgAl 2 O 4 samples, the (10) reflection at 2θ ca.…”

Section: Resultsmentioning

confidence: 99%

Turbostratic Boron Nitride Coated on High‐Surface Area Metal Oxide Templates

et al. 2007

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Keywords: Boron nitride / Turbostratic / Metal oxide templates / Catalyst support material / Nanostructure Boron nitride coatings on high-surface area MgAl 2 O 4 and Al 2 O 3 have been synthesized and characterized by transmission electron microscopy and by X-ray powder diffraction. The metal oxide templates were coated with boron nitride using a simple nitridation in a flow of ammonia starting from ammonium borate adsorbed on MgAl 2 O 4 or γ-Al 2 O 3 .

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A Coexistence of Boron Nitride and Boric Oxide

Cited by 71 publications

References 0 publications

The effect of transition metals on the structure of h-BN intercalation compounds

The effect of transition metals on the structure of h-BN intercalation compounds

Synthetic Routes and Formation Mechanisms of Spherical Boron Nitride Nanoparticles

Turbostratic Boron Nitride Coated on High‐Surface Area Metal Oxide Templates

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