Synthesis of B4C powder via the carbothermal reduction and photoreduction of Cr(VI) on B4C under visible light irradiation

Köysüren, Özcan; Köysüren, Hafize Nagehan

doi:10.1007/s43207-023-00307-3

Cited by 2 publications

(1 citation statement)

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“…Various machine parts, light mass armors for body and vehicle, protective coating of electronic surfaces, p-type semiconductors, thermocouples, diode and transistor devices, and control rods and shielding for nuclear reactors as well as materials for cancer therapy by neutron capturing have been manufactured using boron carbide and its composites [ 9 – 13 ]. Due to these various applications in our daily lives, various physicochemical properties have long been investigated [ 14 – 17 ] with ongoing detailed studies on B 4 C and its composite materials [ 18 – 25 ].…”

Section: Introductionmentioning

confidence: 99%

Optimum pyrolysis conditions to prepare the most crystalline boron carbide powder from boric acid–mannitol complex ester

PEKDEMİR,

ÖNAL,

SARIKAYA

2023

Turkish Journal of Chemistry

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A weak acidic complex ester (CE) in solid form was prepared by a condensation reaction between very weak boric acid (BA: H 3 BO 3 ) and (D)-mannitol (MA: C 6 H 14 O 6 ) by the molar ratio of BA/MA = 2. A boron carbide (B 4 C) precursor was obtained from heating of the CE at 400 °C for 4 h. The precursor was pyrolyzed under argon flow in the interval of 1300–1550 °C for 4 h and at 1400 °C for 1–4 h, respectively. The materials were examined using several techniques such as X-ray diffraction analysis, thermal analysis, scanning electron microscopy, particle size distribution, and nitrogen adsorption/desorption. The optimum pyrolysis temperature and duration were 1400 °C and 4 h, respectively. The most crystalline B 4 C particles were distributed between 1 and 100 μm with a mean particle size of 20 μm. The specific surface area and specific pore volume were 13.5 m 2 g −1 and 0.09 cm 3 g −1 , respectively. The size of the pores was between 2 and 36 nm with a mean size of 14 nm.

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