CHINESE JOURNAL OF ENERGETIC MATERIALS
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Al@TiO2/KClO4含能药剂的制备及反应性能
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1.四川航天川南火工技术有限公司, 四川 泸州646000;2.先进火工品技术创新中心, 四川 泸州646000;3.四川大学 材料科学与工程学院, 四川 成都 610064;4.火箭军装备部驻某地代表室, 四川 泸州646000

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中央高校基本科研业务费专项(2024)


Preparation and Reaction Properties Research of Al@TiO2/KClO4 Energetic Pyrotechnic Composition
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Affiliation:

1.Sichuan Aerospace Chuannan Initiating Explosive Technology Limited, Luzhou 646000, China;2.Innovation Center for Advanced Pyrotechnics Technology, Luzhou 646000, China;3.College of Materials Science and Engineering, SiChuan University, Chengdu 610065, China;4.Representative Office Stationed in a Region by Rocket Army Equipment Department, Luzhou 646000, China

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    摘要:

    为了提高Al/KClO4烟火药的反应性能,减小点火器输出压力散差,采用原位置换法制备了核壳结构Al@TiO2含能粒子,并用湿混造粒的方法制备了Al@TiO2/KClO4烟火药。分别采用扫描电镜(SEM)、X射线衍射仪(XRD)、差热-热重联用仪(TG-DSC)、量热仪研究了Al@TiO2/KClO4药剂的微观形貌、成分组成、热分解性能与燃烧性能。最后,采用密闭爆发器分别测试了Al/KClO4及Al@TiO2/KClO4药剂的输出压力,并对输出压力均值和标准差进行了对比。结果表明,采用原位置换法成功制备了核壳结构Al@TiO2复合颗粒,基于该颗粒制备的Al@TiO2/KClO4药剂表观活化能降低18%,燃烧热略低于Al/KClO4,输出压力标准差由0.28 MPa下降到0.13 MPa。TiO2壳层的存在提升了Al和KClO4的反应性能,Al@TiO2/KClO4药剂的输出压力标准差为0.13,较Al/KClO4药剂的输出压力标准差0.28显著降低。

    Abstract:

    To improve the reaction performance and reduce variations in the output pressure of Al/KClO4 pyrotechnic compositions, in-situ replacement method was applied to replace the inert layer of micron-sized aluminum with TiO2 layer. Scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry-thermogravimetry (TG-DSC) and thermal analysis were conducted to study the microstructure, composition, thermal and combustion properties of Al@TiO2 particles. The consistency of output pressure was analyzed through ignition experiments. The results show that aluminum coated with TiO2 layer is well prepared by in-situ replacement method. The explosives made with Al@TiO2 have an 18% lower in activation energy (Ea) and a slightly lower enthalpy compared to ordinary Al. The standard deviation of output pressure decreased from 0.28 MPa to 0.13 MPa. The thermal behavior of aluminum and potassium perchlorate was enhanced by the TiO2 layer, significantly improving the consistency of output pressure.

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佟乐乐,先明春,毛健,等. Al@TiO2/KClO4含能药剂的制备及反应性能[J]. 含能材料,DOI:10.11943/CJEM2024149.

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  • 收稿日期: 2024-06-13
  • 最后修改日期: 2024-09-12
  • 录用日期: 2024-09-13
  • 在线发布日期: 2024-09-13
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