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Preparation and characterization of high-reactivity explosive-based nano-boron microspheres

PARTICUOLOGY 2024年第10期93卷 125-136页

作者： Dong, Chen Wang, Yi Jia, Kanghui song, Dan song, xiaolan An, Chongwei North Univ China Sch Mat Sci & Engn Taiyuan 030051 Peoples R China Jinxi Grp Shanxi Jiangyang Chem Co Ltd Taiyuan 030051 Peoples R China China Ordnance Inst Sci & Technol Beijing 100089 Peoples R China North Univ China Sch Environm & Safety Engn Taiyuan 030051 Peoples R China

Boron nanoparticles, with their remarkably high gravimetric and volumetric calorific values, emerge as the most promising fuel in energetic fields. However, challenges such as susceptibility to oxidation, high ignition temperature, and low combustion efficiency have constrained their further applications. In this study, we fabricated high explosives based nano-boron microspheres with uniform size using the electrostatic spray method, in which the boron nanoparticles and high explosives (CL-20 or PETN) are closely bonded together by fluorinated polymer (F-2602) and evenly distributed. The results indicated that the microspheres exhibited high sphericity and showed an enhanced antioxidant capability. The addition of high-energy explosives not only reduced the thermal oxidation temperature of nano-boron powder within the microspheres but also significantly enhanced the pressurization rate. Additionally, the microspheres with added high-energy explosives released more energy during the combustion process. Compared to physically mixed samples, electrostatically sprayed microspheres with a uniform microstructure still exhibited higher reactivity. Therefore, the design and synthesis of microspheres with controllable structures using the electrostatic spray method show promising application prospects. (c) 2024 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Nano-boron CL-20 PETN Electrospraying Ignition and combustion NANOPARTICLES COMBUSTION

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球形纳米SiO_(2)的制备及其铝热剂的燃烧性能研究

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化工新型材料 2024年第S1期52卷 229-235页

作者：陈柏辰王毅宋小兰安崇伟中北大学材料科学与工程学院太原030051 中北大学环境与安全工程学院太原030051

采用溶胶-凝胶法,通过正交试验优化,制备平均粒径为120nm的球形纳米SiO_(2)。采用扫描电子显微镜、透射电子显微镜、X射线衍射仪、红外光谱仪及全自动比表面及孔隙度分析仪等手段对该纳米SiO_(2)进行了表征。将制得的纳米SiO_(2)与Al粉... 详细信息

采用溶胶-凝胶法,通过正交试验优化,制备平均粒径为120nm的球形纳米SiO_(2)。采用扫描电子显微镜、透射电子显微镜、X射线衍射仪、红外光谱仪及全自动比表面及孔隙度分析仪等手段对该纳米SiO_(2)进行了表征。将制得的纳米SiO_(2)与Al粉和纳米MnO_(2)混合,配制成零氧平衡的复合铝热剂,详细测试了该铝热剂的燃烧性能。结果表明:低温有利于颗粒粒径的控制和分散度的调整。溶液的介电常数对颗粒形成有较大影响。正硅酸乙酯和氨水的浓度与SiO_(2)颗粒大小成正比。BET数据表明,纳米SiO_(2)比表面积较大,为微孔和介孔的混合结构。SiO_(2)的粒度大小对铝热剂的燃烧时间与效率有很大影响。随着SiO_(2)粒径的减小,铝热剂的燃烧压力峰值及增压速率得到了显著的提升,这为纳米SiO_(2)在复合铝热剂中的应用提供了参考。

关键词：溶胶-凝胶法纳米SiO_(2) 铝热剂燃烧性能

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分子钙钛矿含能材料DAP-4对固体推进剂能量性能的影响

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化学推进剂与高分子材料 2024年第4期22卷 27-35页

作者：陈康宇宋小兰宋丹王毅安崇伟中北大学环境与安全工程学院山西太原030051 中国兵器科学技术研究院北京100089 中北大学材料科学与工程学院山西太原030051

利用NASA–CEA2软件,在标准条件下,分别计算了含DAP–4((C_(6)H_(14)N_(2))[NH_(4)(ClO_(4))_(3)])的HTPB(端羟基聚丁二烯)推进剂、GAP(聚叠氮缩水甘油醚)推进剂、CMDB(复合改性双基)推进剂和NEPE(硝酸酯增塑聚醚)推进剂的能量性能;重... 详细信息

利用NASA–CEA2软件,在标准条件下,分别计算了含DAP–4((C_(6)H_(14)N_(2))[NH_(4)(ClO_(4))_(3)])的HTPB(端羟基聚丁二烯)推进剂、GAP(聚叠氮缩水甘油醚)推进剂、CMDB(复合改性双基)推进剂和NEPE(硝酸酯增塑聚醚)推进剂的能量性能;重点研究了以DAP–4分别替代RDX(黑索今)、HMX(奥克托今)、CL–20(六硝基六氮杂异伍兹烷)、TKX–50(5,5'–联四唑–1,1'–二氧二羟胺)后推进剂能量的变化趋势;对比了4种含DAP–4推进剂的能量性能。结果表明,当推进剂配方中添加DAP–4后,其标准比冲(I_(sp))和特征速度(C^(*))呈线性趋势增加。特别是当配方中只含DAP–4高能填料时,HTPB、GAP、CMDB、NEPE推进剂的I_(sp)分别达到了2617.5、2688.4、2679.4、2708.7N·s/kg,C^(*)分别达到了1604.1、1634.7、1639.1、1654.7m/s,高于目前已知固体推进剂的比冲和特征速度。同时给出了推进剂燃烧温度和燃烧产物平均分子量的数据,通过分析这2个参数的变化,部分解释了添加DAP–4后推进剂I_(sp)和C^(*)的变化机制,为DAP–4在固体推进剂中的应用提供参考。

关键词： DAP–4 分子钙钛矿含能材料能量性能固体推进剂

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Electrochemical behaviors of silicon wafers in silica slurry

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Journal of University of Science and Technology Beijing 2008年第4期15卷 495-499页

作者： xiaolan song Haiping Yang Xunda Shi Xi He Guanzhou Qiu Department of Inorganic Materials School of Minerals Processing and Bioengineering Central South University Changsha 410083 China Silicon Wafer Manufacture Department Grinm Semiconductor Materials Co. Ltd. Beijing 100088 China

The electrochemical behaviors of n-type silicon wafers pH value and solid content of the slurry on the corrosion of silicon in silica-based slurry were investigated, and the influences of the wafers were studied by using electrochemical DC polarization and AC impedance techniques. The results revealed that these factors affected the corrosion behaviors of silicon wafers to different degrees and had their suitable parameters that made the maximum corrosion rate of the wafers. The corrosion potential of （100） sttrface was lower than that of（111）, whereas the current density of （100） was much higher than that of（111）.

关键词： silicon wafers electrochemical behavior impedance corrosion polarization curves

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Bimetallic-organic coordination polymers to prepare N-doped hierarchical porous carbon for high performance supercapacitors

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Progress in Natural Science:Materials International 2019年第5期29卷 495-503页

作者： Danchen Fu Zeyu Chen Chuying Yu xiaolan song Wenbin Zhong School Minerals Processing and Bioengineering Central South University College of Materials Science and Engineering Hunan University

Single metal-organic coordination polymers have limited functions as precursors for porous carbon electrode *** construction of bimetallic organic coordination polymers can effectively utilize the advantages of each single metal-organic coordination polymer to improve the performance of the derived carbon ***,High performance nitrogen-doped porous carbon(BC;)have been produced by directly carbonizing bimetallic organic coordination polymers formed by 4,4’-bipyridine（BPD）reaction with Fe Cl;and NiCl;.The BC;exhibits high nitrogen content（12.66 at%）,large specific surface area(1049.51 m;g;)and hierarchical porous structure,which contributes to an excellent gravimetric specific gravity of 320.5 Fg;and 108%of specific capacitance retention after 10000 *** BC;assembled symmetrical supercapacitor shows an energy density of 18.3 Wh kg;at a power density of 350 W kg;.It is expected that the as-prepared N-doped porous carbon derived from bimetallic-organic coordination polymer is a promising electrode material for high performance energy storage devices.

关键词： Bimetallic-organic coordination polymers N-doped porous carbon High specific surface area Supercapacitors

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Synthesis of pomegranate-shaped micron ZnMn_(2)O_(4) with enhanced lithium storage capability

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Journal of Materiomics 2021年第4期7卷 699-707页

作者： Ying Zhang Pu Zhang Yue Xu xiaolan song Hui Wang Ting Ma Key Laboratory for Mineral Materials&Application of Hunan Province School of Mineral Processing and BioengineeringCentral South UniversityChangsha410083China Department of Materials Science and Engineering Stanford UniversityStanfordCA94305USA Changsha Intelligent Driving Institute Changsha410208China

As high capacity anode materials,spinel-type transition metal oxides have a bottleneck of poor cyclic *** structure and carbon loading are common modification approaches,while the high cost is unaffordable for industrial *** this study,micron scale zinc manganate was synthesized by solvothermal plus calcination *** pomegranate-shaped ZnMn_(2)O_(4)(p-ZMO)was obtained using solvent of ethylene glycol,and the microsphere-shaped ZnMn2O_(4)(m-ZMO)was obtained using *** electrochemical testing,the p-ZMO anode delivered larger charge capacity of 726 mAh g^(-1) at 0.2 Ag^(-1) than 589 mAh g^(-1) of *** over 1000 cycles at 1 Ag^(-1),the p-ZMO still maintained a reversible capacity of 506 mAh g^(-1)(much higher than 372 mAh g^(-1) of graphite anode),with a superior retention of 84%.It indicates that this work develops an effective strategy to prepare high-performance transition metal oxides for anode materials of lithium-ion batteries.

关键词： ZnMn2O_(4) Micron structure Lithium-ion battery Anode material Cyclic stability

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Oligolayered Ti3C2Tx MXene towards high performance lithium/sodium storage

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Nano Research 2020年第6期13卷 1659-1667页

作者： xiaolan song Hui Wang Shengming Jin Miao Lv Ying Zhang Xiaodong Kong Hongmei Xu Ting Ma Xinyuan Luo Hengfeng Tan Dong Hu Chaoyong Deng Xinghua Chang Jianlong Xu Hunan Key Lab of Mineral Materials and Application School of Minerals Processing and BioengineeringCentral South UniversityChangsha410083China Guangdong Zhiyuan New Material Co. LTDQingyuan513055China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou215123China

Nano Research volume 13,pages1659–1667(2020)Cite this article 232 Accesses 3 Citations Metrics details Abstract 2D MXenes are highly attractive for achieving ultrafast and stable lithium/sodium storage due to their good electric conductivity and abundant redox active ***,effective strategies for scalable preparation of oligolayered MXenes are still under ***,oligolayered Ti3C2Tx MXene is successfully obtained after conventional synthesis of multilayered Ti3C2 and subsequent delamination process via an organic solvent of tetramethyl-ammonium hydroxide(TMAOH).Comprehensive electrochemical study reveals that surface-controlled redox reaction dominated the charge storage behavior of oligolayered Ti3C2Tx with fast reaction ***,the obtained oligolayered Ti3C2Tx exhibits excellent lithium/sodium storage performance,featured for a high specific capacity of 330 mAhg^−1 at 1.0 Ag^−1 after 800 cycles for lithium storage and 280 mAhg^−1 at 0.5 Ag^−1 after 500 cycles for sodium *** impressive performance will advance the development of oligolayered Ti3C2Tx based materials for lithium/sodium storage and even broaden their application into energy storage.

关键词： oligolayered Ti3C2Tx MXene delamination lithium ion battery sodium ion battery pseudocapacitance contribution

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Thoughts on the Cultivation Countermeasures of Senior Engineering Talents

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教育研究前沿（中英文版） 2014年第2期4卷 24-29页

作者： Yu Yang xiaolan song XiQing Wu Yongbin Yang Tao Jiang School of Minerals Processing and Bioengineering Central South University Key Laboratory of B iometallurgy Ministry of Education Centre of Biometallurgical Engineering 932 South Lushan Road Changsha Hunan China 410083

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Layer-by-layer fabrication of montmorillonite coating immobilizing Cu_(2)O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone

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Chinese Journal of Chemical Engineering 2024年第4期68卷 263-275页

作者： Kejin Li Jiahui Liu Dajian Li xiaolan Chen Chunhui Zhou Research Group for Advanced Materials&Sustainable Catalysis(AMSC) State Key Laboratory Breeding Base of Green Chemistry-Synthesis TechnologyCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310032China Qing Yang Institute for Industrial Minerals Qingyang 242804China Engineering Research Center of Non-metallic Minerals of Zhejiang Province Zhejiang Institute of Geology and Mineral ResourcesHangzhou 310007China

Microreactors are increasingly used for green and safe chemical processes owing to their benefits of superior mass and heat transfer,increased yield,safety,and simplicity of ***,immobilizing catalysts in microreactors remains *** this investigation,a technique for creating Cu_(2)O/montmorillonite catalyst coating,using electrostatic attraction for layer-by-layer self-assembly,was *** montmorillonite film's morphology and thickness could be efficiently regulated by adjusting the degree of exfoliation and surface charge of montmorillonite,alongside layer-by-layer coating *** Cu_(2)O nanoparticles were immobilized using the flow deposition *** resulting Cu_(2)O@montmorillonite-film-coated capillary microreactor successfully transformed glycerol into *** conversion of glycerol and product selectivity could be controlled by adjusting the molar ratio of reactants,temperature,residence time,and Cu_(2)O *** maximum glycerol conversion observed was 47.6%,with a 27%selectivity toward *** study presents a technique for immobilizing montmorillonite-based catalyst coatings in capillary tubing,which can serve as a foundation for the future application of microreactors in glycerol conversion.

关键词： Microreactor Coating Montmorillonite Glycerol Cu_(2)O

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Observations on spontaneous chiral symmetry breaking and the mass gap of QCD in finite volume

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Communications in Theoretical Physics 2024年第9期76卷 42-47页

作者： xiaolan Meng Bolun Hu Yi-Bo Yang University of Chinese Academy of Sciences School of Physical SciencesBeijing 100049China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUCASHangzhou 310024China International Centre for Theoretical Physics Asia-Pacific Beijing/HangzhouChina

We present a lattice quantum chromodynamics(QCD)simulation with 2+1+1 flavor full QCD ensembles using near-physical quark masses and different spatial sizes L,at a~0.055 *** results show that the scalar and pesudoscalar 2-point correlator with a valence pion mass of approximately 230 MeV become degenerated at L≤1.0 fm,and such an observation suggests that the spontaneous chiral symmetry breaking disappears effectively at this *** the same time,the mass gap between the nucleon and pion masses remains larger thanΛQCDin the entire L∈[0.2,0.7]fm range.

关键词： lattice QCD chiral symmetry breaking confinement

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