Synthesis of highly dispersed boron carbide from nanofibrous carbon

Krutskii, Yu. L.; Bannov, Alexander G.; Соколов, В. В.; Dyukova, K. D.; Shinkarev, V. V.; Ukhina, Arina V.; Максимовский, Е. А.; Pichugin, Andrey; Solov’ev, E. A.; Krutskaya, T. M.; Kuvshinov, G. G.

doi:10.1134/s1995078013020109

Cited by 20 publications

(5 citation statements)

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“…Another intense exothermic peak started at 800 and 750°C for LB1N and LB3N composite samples respectively, reflecting the existence of the oxidation process. The exothermic peaks formed due to the oxidation reaction of boron carbide individual phase appeared around 678°C as the literature reveals . These exothermic peaks appeared for LB1N and LB3N and are attributed to the boron carbide phase in the oxidation reaction.…”

Section: Resultsmentioning

confidence: 64%

“…The exothermic peaks formed due to the oxidation reaction of boron carbide individual phase appeared around 678°C as the literature reveals. 31 These exothermic peaks appeared for LB1N and LB3N and are attributed to the boron carbide phase in the oxidation reaction. The decreasing of oxidation temperatures from LB1N to LB3N may attribute to the crystallite size difference of the synthesized boron carbide particles.…”

Section: Resultsmentioning

confidence: 95%

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Thermal properties and formation mechanism of h‐BN nanoneedles synthesized via carbothermic reduction reaction

Ahmed

El‐Sheikh

Allah

et al. 2017

Int J Applied Ceramic Tech

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Hexagonal boron nitride (BN) was synthesized through the carbothermic reduction reaction (CRR) of boric acid using lactose as a carbon source under the nitrogen atmosphere at 1500°C for 3 hours. The boron/carbon (B/C) molar ratio was controlled during the CRR, and the produced samples were investigated by XRD diffraction pattern, FTIR analysis, and Raman spectra. Boron carbide (B 4 C) was formed in samples that have a higher carbon content, in addition to boron nitride. While boron nitride pure sample was produced from lower carbon content samples. Formation of B 4 C was found to depend on the B/C molar ratio. The morphology of the produced powder was also investigated by SEM and TEM, which revealed that the samples consist of nanoneedles of BN and hexagonal particles of B 4 C. The vapor-solid (VS) reaction mechanism was processed greatly with increasing boron amount, producing boron nitride nanoneedles, which compete with the liquid-solid (LS) reaction mechanism. The physicochemical properties of the produced samples were studied by DTA, UV, PL, and AC impedance measurements, and revealed that the samples are promising to many proper applications.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 95%

Thermal properties and formation mechanism of h‐BN nanoneedles synthesized via carbothermic reduction reaction

Ahmed

El‐Sheikh

Allah

et al. 2017

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

show abstract

“…Для определения температуры начала восстановления по реакции (1) был выполнен термодинамический анализ. Исходные для расчета данные брались из справочников [1,14]. Результаты расчетов приведены на рис.…”

Section: материалы и методы исследованияunclassified

“…Байкова протекает через образование промежуточных низших оксидов. Имеющиеся в справочнике [14] сведения о свободной энергии образования этих соединений позволяют провести расчеты для следующих промежуточных реакций:…”

Section: материалы и методы исследованияunclassified

“…В частности, полностью отсутствует информация об использовании в качестве реагента нановолокнистого углерода (НВУ), полученного при каталитическом пиролизе метана [13]. В то же время установлено, что НВУ является эффективным реагентом для синтеза высокодисперсного карбида бора [14].…”

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