Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors

Rafi-Ud-Din, .; Zahid, G. H.; Asghar, Z.; Maqbool, Muhammad Salman; Ahmad, Ejaz; Azhar, Tanvir; Subhani, Tayyab; Shahzad, M.I.

doi:10.1016/j.jascer.2014.05.011

Cited by 31 publications

(14 citation statements)

References 30 publications

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“…The use of organic precursors, for the formation of BC, facilitates the dispersibility and uniformity of boron and carbon sources. Among boron sources, boric acid enhances the esteri cation process due to the liberation of hydroxyl groups [31,36]. For the synthesis of BC, boric acid (Sigma-Aldrich) and castor oil (Indian pharmaceuticals) are used as the boron and carbon sources in the ratio of 1:4, respectively, by condensation reaction method.…”

Section: Methodsmentioning

confidence: 99%

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Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

Devi

Swapna

Sankararaman

2020

Preprint

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The development of one-dimensional nanostructures has revolutionized electronic and photonic industries because of their unique properties. The present paper reports the low-temperature green synthesis of boron carbide nanowires, of diameter 14 nm and length 750 nm, by the condensation method using castor oil as the carbon precursor. The nanowires synthesized exhibit beaded chain morphology, and bandgap energy of 2.08 eV revealed through the Tauc plot analysis. The structure of boron carbide nanowires is revealed by Fourier transform infrared spectroscopy and X-ray diffraction analyses. The photoluminescence study reveals the nanowire's blue light emission capability under ultraviolet excitation, which is substantiated by the CIE plot suggesting its potential in photonic applications.

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Section: Methodsmentioning

confidence: 99%

“…The condensation method is one of the low-temperature synthesis methods used for BC's production using inexpensive organic precursors such as glycerin, citric acid, and polyvinyl alcohol (PVA) [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

Devi

Swapna

Sankararaman

2020

Preprint

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“…Moreover, the peak at 2952 cm -1 is referred to the aliphatic vibration of the C-H bonds, which are not found in the PVBO spectra [22]. The 1287 cm -1 and 1080 cm -1 absorption peaks were ascribed to the B-O-C bonds, which are the main evidence for the formation of PVBO [26,27,31,34]. Therefore, condensation reactions were executed between the PVA and H 3 BO 3 .…”

Section: Ftir Analysismentioning

confidence: 98%

“…A conventional carbothermal reduction method is commonly used in commercial electric arc-furnace systems [24]. However, this method is extremely expensive and ineffective for the production of B 4 C owing to its high production temperature (> 2000 °C), difficult-to-control stoichiometry, free remaining carbon, necessary finishing processes (such as grinding and leaching to resolve contamination), and long processing time [2,4,[23][24][25]26]. Other synthesis methods, such as a magnesiothermic reduction and chemical vapor deposition, are not costeffective at an industrial scale.…”

Section: Introductionmentioning

confidence: 99%

Use of Partially Hydrolyzed Pva for Boron Carbide Synthesis From Polymeric Precursor

Karaahmet¹

2020

Ceramics - Silikaty

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Boron carbide (B 4 C) synthesis from a polymeric precursor is an alternative to a traditional carbothermal reduction, promising low energy consumption and production costs, particularly for a polymeric precursor such as polyvinyl borate (PVBO). The sol-gel technique is preferred in the production of polymeric precursors owing to its convenience in producing singlesource reactants for synthesizing B 4 C at low temperatures (< 1800 °C). The sol-gel parameters, such as the composition, viscosity, and pH, affect the formation of the polymeric precursor. In this study, industrial-grade partially hydrolyzed PVA and technical-grade boric acid (H 3 BO 3 ) are used to produce PVBO. We aim to specify the viscosity and pH values for different ratios of PVA:H 3 BO 3 . A sample with a weight ratio of PVA:H3BO3 of 1:1 ( PHD101) is determined to have the optimum process parameters. Calcination is performed between 500 °C and 700 °C for 1-3 h to produce a single-source reactant, which consists of boron oxide (B 2 O 3 ) and carbon. It was observed that B 2 O 3 was distributed on the nano-scale level in the carbon matrix. The reactant is heat-treated at 1400 °C for 5 h and crystalline, polyhedral, and irregular B4C particles are synthesized at low temperatures from industrial grade raw materials.

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“…Glutinous rice flour is an interesting alternative precursor for the B4C synthesis because it is an inexpensive and readily available carbon source with high content of -OH functional groups in its structure. These -OH functional groups can interact with boric acid, resulting in the formation of B-O-C bonds which facilitates the reaction between B and C species to form B4C, enhancing low temperature synthesis [7,[15][16].…”

Section: Introductionmentioning

confidence: 99%

Influence of precursor preparation on the synthesis of boron carbide from glutinous rice flour

Dateraksa

Sinchai

2021

J Met Mater Miner

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Boron carbide is a promising candidate for a variety of applications, including blasting nozzles, neutron moderators, and lightweight armor. Using of inexpensive and readily available starting materials which can react with boric acid to form B-O-C bonds, e.g., glutinous rice flour, is one of alternative means to produce high purity boron carbide powder at low temperature. In this study, boric acid and glutinous rice flour, boron and carbon sources, were used for synthesizing B4C powder by the carbothermic reduction. The mole ratios of boric acid to glutinous rice flour ranging from 1:1 to 2.5:1 were formulated and mixed by continuous stirring at 80℃ for 2 h to 8 h. The influence of reaction time during the mixing process on the phase formation of the synthesized powder was investigated. It was found that appropriate reaction time for condensation of 4 h facilitated the B4C phase formation during synthesis. The precursors were synthesized under Ar flow at 1350℃ to 1450℃ for 5 h without calcination. B4C powder with the purity of 90 wt% was successfully synthesized from this study. Chemical bonding, phase analysis, and morphology of the synthesized powder were identified by Fourier-transform infrared spectroscopy, X-ray diffraction, and scanning electron microscope, respectively. The influences of starting composition and synthesis temperature on the characteristics of the synthesized powders were also discussed.

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Ethylene glycol assisted low-temperature synthesis of boron carbide powder from borate citrate precursors

Cited by 31 publications

References 30 publications

Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

Boron Carbide Nanowires from Castor Oil for Optronic Applications: A Low-Temperature Greener Approach

Use of Partially Hydrolyzed Pva for Boron Carbide Synthesis From Polymeric Precursor

Influence of precursor preparation on the synthesis of boron carbide from glutinous rice flour

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