Low-temperature carbothermal nitridation of boron oxide induced by networked carbon structure

Kakiage, Masaki; Shoji, Tetsuro; Kobayashi, Haruo

doi:10.2109/jcersj2.15197

Cited by 7 publications

(3 citation statements)

References 16 publications

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“…Note that the sample A, most probably, contains unreacted carbon, because it is wellknown that carbothermal reduction method provides the material strongly contaminated with unreacted charcoal (see, e.g., [24]). However, identification of carbon clusters by their diffraction pattern is not possible in this material, since the most intense peak of carbon particles ([002] -26.5°) overlaps with the [002] peak of BN (26.27°) [29][30][31]. Fig.…”

Section: Resultsmentioning

confidence: 99%

Light-emitting properties of BN synthesized by different techniques

Rudko¹,

Sartinska²,

Ісаєва³

et al. 2020

SPQEO

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Light-emitting properties of boron nitride powders of different morphology grown using various techniques have been studied. All samples were hexagonal BN (h-BN), while the content of impurity phases varied considerably. The wide photoluminescence band in the visible range has been observed. h-BN synthesized using carbothermal reduction method exhibited the highest efficiency of the photoluminescence emission. The intensity of BN emission has been interpreted in terms of interplay between the emission of intrinsic defects stabilized by carbon, carbon-related recombination centers and the centers of non-radiative recombination caused by the presence of sassolite phases in the samples.

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Section: Resultsmentioning

confidence: 99%

Light-emitting properties of BN synthesized by different techniques

Rudko¹,

Sartinska²,

Ісаєва³

et al. 2020

SPQEO

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“…Finally, the preparation of BN by the present method was compared with some reported methods in recent years. [62][63][64][65][66][67][68][69][70][71][72][73][74][75] From the Table 1, it is clear that with respect to reaction conditions and time, the present method is more suitable and superior. Most of the reported methods required high temperature and/or pressure, complicated expensive instruments, expensive and/or sensitive starting materials, long reaction times, inert atmosphere and strict operating conditions.…”

Section: Characterization Of the Bn Nanosheetsmentioning

confidence: 99%

Microwave-assisted rapid synthesis of graphene-analogue hexagonal boron nitride (h-BN) nanosheets and their application for the ultrafast and selective adsorption of cationic dyes from aqueous solutions

2017

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“…activated carbon at 1200°C for 10 h in a N 2 flow. 26) The BN formation was accelerated for the product obtained from the precursor powder, which had a finely dispersed B 2 O 3 /carbon structure. This demonstrates that the formation of the B 2 O 3 /carbon structure is effective for the lowtemperature carbothermal nitridation.…”

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confidence: 99%

Low-temperature synthesis of boride powders by controlling microstructure in precursor using organic compounds

Kakiage

2018

J. Ceram. Soc. Japan

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The carbothermal reduction of boron oxide (B 2 O 3) is an important process for the synthesis of boride powders. As a low-temperature synthesis method for boron carbide (B 4 C) powder by carbothermal reduction, we focused on an approach using a condensed product prepared from boric acid (H 3 BO 3) and an organic compound with a number of hydroxyl groups (a polyol) such as glycerin, mannitol, or poly(vinyl alcohol). A borate ester bond was formed by the dehydration condensation of H 3 BO 3 and a polyol, leading to the homogeneous dispersion of the boron and carbon sources at the molecular level. The thermal decomposition of a condensed H 3 BO 3-polyol product in air was performed to control the amount of carbon to the stoichiometric C/B 2 O 3 ratio required for carbothermal reduction. Within the thermally decomposed product consisting of B 2 O 3 and carbon components (B 4 C precursor), a B 2 O 3 /carbon structure at the nanometer scale was formed. The improved dispersibility and homogeneity of the B 2 O 3 /carbon microstructure accelerated the B 4 C formation at a lower temperature. Consequently, crystalline B 4 C powder with little free carbon was synthesized by heat treatment at a low temperature of 1200°C in an Ar flow. This low-temperature synthesis approach was applied to the lowtemperature synthesis of other boride powders, i.e., boron nitride and calcium hexaboride powders.

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Low-temperature carbothermal nitridation of boron oxide induced by networked carbon structure

Cited by 7 publications

References 16 publications

Light-emitting properties of BN synthesized by different techniques

Light-emitting properties of BN synthesized by different techniques

Microwave-assisted rapid synthesis of graphene-analogue hexagonal boron nitride (h-BN) nanosheets and their application for the ultrafast and selective adsorption of cationic dyes from aqueous solutions

Low-temperature synthesis of boride powders by controlling microstructure in precursor using organic compounds

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