Thermal properties and formation mechanism of h‐ BN nanoneedles synthesized via carbothermic reduction reaction
Source abstract
Abstract
Abstract 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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Research context
OpenAlex topics: Graphene research and applications · Boron and Carbon Nanomaterials Research · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Central Metallurgical Research and Development Institute, CMRDI Helwan Egypt
Chemistry Department Faculty of Science Helwan University Helwan Egypt
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