Study on Preparation and Reaction Mechanism of Boron Carbide Fine Powders by Catalytic-free Liquid Phase Method AITranslate
Abstract AITranslate
Boron carbide(B4C) fine powders were successfully synthesized by using glycerol, boric acid and nano carbon powders as raw materials and without any catalyst.The suspension precursor was prepared by ultrasonic vibrator, and then burned at low temperature before carbothermal synthesis reaction at high temperature.The phase composition, microsturcture and chemical composition of the products were characterized by XRD,SEM,TEM and EDS.The effect of synthesis temperature on phase composition of the products was studied.The results show that when the synthesis temperature is 1 200 ℃,boron carbide is formed.Boron carbide with high crystallinity and low impurity content can be obtained by holding in va-cuum at 1 400 ℃ for 2 h, its particle size ranges from 30 nm to 30 μm, and nanoparticles exist in the form of aggregates.The components involved in the reaction are mixed at the nanometer level in the suspension, and the combustion product of the suspension still maintains the nanometer size and has high chemical activity, which can greatly reduce the synthesis reaction temperature and time.
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DOI：
Chinese Library Classification Number:TB34[一般工业技术—材料科学与工程]
Citation Information:
Boron carbide(B4C) fine powders were successfully synthesized by using glycerol, boric acid and nano carbon powders as raw materials and without any catalyst.The suspension precursor was prepared by ultrasonic vibrator, and then burned at low temperature before carbothermal synthesis reaction at high temperature.The phase composition, microsturcture and chemical composition of the products were characterized by XRD,SEM,TEM and EDS.The effect of synthesis temperature on phase composition of the products was studied.The results show that when the synthesis temperature is 1 200 ℃,boron carbide is formed.Boron carbide with high crystallinity and low impurity content can be obtained by holding in va-cuum at 1 400 ℃ for 2 h, its particle size ranges from 30 nm to 30 μm, and nanoparticles exist in the form of aggregates.The components involved in the reaction are mixed at the nanometer level in the suspension, and the combustion product of the suspension still maintains the nanometer size and has high chemical activity, which can greatly reduce the synthesis reaction temperature and time.
quote
| GB/T 7714-2015 | [1] MA Ming-liang, ZHU Zhen-biao, WANG Shu-jun, et al. Study on Preparation and Reaction Mechanism of Boron Carbide Fine Powders by Catalytic-free Liquid Phase Method[J]. Rare Metals and Cemented Carbides, 2021(3): 70-74. |
| MLA | [1] MA Ming-liang, et al., "Study on Preparation and Reaction Mechanism of Boron Carbide Fine Powders by Catalytic-free Liquid Phase Method." Rare Metals and Cemented Carbides, no. 3, 2021, pp. 70-74. |
| APA | [1] MA Ming-liang, ZHU Zhen-biao, WANG Shu-jun, YANG Xue-dong, & LIU Yin-qi. (2021). Study on Preparation and Reaction Mechanism of Boron Carbide Fine Powders by Catalytic-free Liquid Phase Method. Rare Metals and Cemented Carbides(3), 70-74. |
| IEEE | [1] MA Ming-liang, ZHU Zhen-biao, WANG Shu-jun, YANG Xue-dong, and LIU Yin-qi, "Study on Preparation and Reaction Mechanism of Boron Carbide Fine Powders by Catalytic-free Liquid Phase Method," Rare Metals and Cemented Carbides, no. 3, pp. 70-74, 2021. keywords: {boron carbide(B4C);nanoparticle;catalytic-free liquid phase method;suspension precursor;low-temperature combustion;high-temperature carbothermal synthesis;reaction mechanism} |