Purification of amorphous boron powder by using the soluble transformation of acid-insoluble boron magnesium compounds
Abstract
At present, amorphous boron powder is considered to be the best fuel for solid fuel-rich propellants due to its extremely high volume calorific value and mass calorific value. Amorphous boron powder produced by magnesium thermal reduction contains many impurities that are insoluble in acids. In addition to impurities, oversized particles, and limited chemical reactivity, these issues significantly restrict the extensive use of this material in military and aerospace sectors. In this paper, the soluble transformation mechanism of insoluble boron magnesium compounds in amorphous boron powder at calcining and a method to purify boron powder were studied. To remove insoluble boron magnesium compounds in amorphous boron powder, insoluble impurities Mg2B2O5 and MgB4 were directionally transformed into soluble MgB4O7 and MgO at calcining. The samples were subsequently subjected to water or acid leaching to convert the crude amorphous boron powder product to high purity. SEM-EDS, XRD, XPS, and other techniques were used to determine the occurrence states of impurity phases. The transformation of impurity phases after calcining water leaching and acid leaching was monitored. The results showed that the magnesium content in the amorphous boron powder was reduced to 0.96%, and the purity of boron powder was increased to 97.34%.
References
[1] V.K. Bhosale, J. Jeong, S. Kwon, Ignition of boron-based green hypergolic fuels with hydrogen peroxide, Fuel. 255 (2019) 115729. https://doi.org/10.1016/j.fuel.2019.115729.
[2] X. E, X. Zhi, Y. Zhang, C. Li, J. Zou, X. Zhang, L. Wang, Jet fuel containing ligand-protecting energetic nanoparticles: A case study of boron in JP-10, Chem Eng Sci. 129 (2015) 9–13. https://doi.org/10.1016/j.ces.2015.02.018.
[3] D. Liu, Z. Xia, L. Huang, J. Hu, Boron Particle Combustion in Solid Rocket Ramjets, J Aerosp Eng. 28 (2015) 04014112. https://doi.org/10.1061/(ASCE)AS.1943-5525.0000443.
[4] A. Jain, S. Anthonysamy, G.S. Gupta, V. Ganesan, Processing of enriched elemental boron (B-10 similar to 65 at. %), Mater Chem Phys. 140 (2013) 335–342. https://doi.org/10.1016/j.matchemphys.2013.03.046.
[5] Z. Zhang, M. Tian, L. Yang, L. Ma, M. Liu, H. Suo, Q. Wang, Systematic investigation into the effect of boron powder purified by different methods on the microstructures and superconductivity of MgB2 bulks, Supercond Sci Technol. 32 (2019) 055009. https://doi.org/10.1088/1361-6668/ab0a33.
[6] A. Seifolazadeh, S. Mohammadi, Synthesis and characterization of nanoboron powders prepared with mechanochemical reaction between B2O3 and Mg powders, Bulletin of Materials Science. 39 (2016) 479–486. https://doi.org/10.1007/s12034-016-1150-x.
[7] W.G. Shin, S. Calder, O. Ugurlu, S.L. Girshick, Production and characterization of boron nanoparticles synthesized with a thermal plasma system, Journal of Nanoparticle Research. 13 (2011) 7187–7191. https://doi.org/10.1007/s11051-011-0633-3.
[8] Z. Dou, T. Zhang, J. He, Y. Huang, Preparation of amorphous nano-boron powder with high activity by combustion synthesis, J Cent South Univ. 21 (2014) 900–903. https://doi.org/10.1007/s11771-014-2016-2.
[9] J. Wang, Y. Gu, Z. Li, W. Wang, Z. Fu, Synthesis of nano-sized amorphous boron powders through active dilution self-propagating high-temperature synthesis method, Mater Res Bull. 48 (2013) 2018–2022. https://doi.org/10.1016/j.materresbull.2013.01.053.
[10] M. Vignolo, G. Bovone, D. Matera, D. Nardelli, C. Bernini, A.S. Siri, Nano-sized boron synthesis process towards the large scale production, Chemical Engineering Journal. 256 (2014) 32–38. https://doi.org/10.1016/j.cej.2014.06.118.
[11] J. Zhou, P. Bai, A review on the methods of preparation of elemental boron, Asia-Pacific Journal of Chemical Engineering. 10 (2015) 325–338. https://doi.org/10.1002/apj.1892.
[12] D. Yang, R. Liu, W. Li, Q.L. Yan, Recent advances on the preparation and combustion performances of boron-based alloy fuels, Fuel. 342 (2023). https://doi.org/10.1016/j.fuel.2023.127855.
[13] Z. Cao, J. Wu, Purification and characterization of amorphous boron powder by microwave heating combined with acid leaching, Powder Technol. 412 (2022). https://doi.org/10.1016/j.powtec.2022.118022.
[14] J. Li, M. Guang, Y. Lu, Effect of Composition on Low-Temperature Soda Roasting of Boron-Rich Blast Furnace Slag, Journal of Sustainable Metallurgy. (2023). https://doi.org/10.1007/s40831-023-00725-x.
[15] B.U. Yoo, H.H. Nersisyan, H.Y. Ryu, J.S. Lee, J.H. Lee, Structural and thermal properties of boron nanoparticles synthesized from B2O3+ 3Mg +kNaCl mixture, Combust Flame. 161 (2014) 3222–3228. https://doi.org/10.1016/j.combustflame.2014.05.022.
[16] S.S. Sreedhara, J. Joardar, V. Ravula, N.R. Tata, Preparation and characterization of nanoboron by cryo-milling, Advanced Powder Technology. 31 (2020) 3824–3832. https://doi.org/10.1016/j.apt.2020.07.021.
[17] M. Capra, G. Bovone, F. Loria, C. Bernini, S.C. Hopkins, A. Ballarino, M. Tropeano, A. Tumino, G. Grasso, C. Ferdeghini, M. Putti, M. Vignolo, Weak acid leaching of MgB2 to purify magnesiothermic boron powder, Mater Today Commun. 26 (2021) 101731. https://doi.org/10.1016/j.mtcomm.2020.101731.
[18] H. Ge, M. Wang, Y. Yao, T. Deng, Thermodynamic Properties for Aqueous MgB4O7 Solution at 298.15 K, J Chem Eng Data. 65 (2020) 26–33. https://doi.org/10.1021/acs.jced.9b00663.
[19] E. A. Lebedeva, S. A. Astaf’eva &, T. S. Istomina, Modification of Boron Powders Used in Energy-Saturated Materials, Russian Journal of Physical Chemistry B, 16, pages316–322 (2022). https://doi.org/10.1134/S1990793122010109
[20] L. Shi, Y. Gu, L. Chen, Z. Yang, J. Ma, Y. Qian, Formation of nanocrystalline BN with a simple chemical route, Mater Lett. 58 (2004) 3301–3303. https://doi.org/10.1016/j.matlet.2004.06.022.
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