Al@TiO_(2)/KClO_(4)含能药剂的制备及反应性能  

Preparation and Reaction Properties Research of Al@TiO_(2)/KClO_(4) Energetic Pyrotechnic Composition

作　　者：佟乐乐 先明春 毛健[3] 陈茂 成琦 胡建举 周杨 TONG Le-le;XIAN Ming-chun;MAO Jian;CHEN Mao;CHENG Qi;HU Jian-ju;ZHOU Yang(Sichuan Aerospace Chuannan Initiating Explosive Technology Limited,Luzhou 646000,China;Innovation Center for Advanced Pyrotechnics Technology,Luzhou 646000,China;College of Materials Science and Engineering,SiChuan University,Chengdu 610065,China;Representative Office Stationed in a Region by Rocket Army Equipment Department,Luzhou 646000,China)

机构地区：[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

出　　处：《含能材料》2024年第10期1049-1057,共9页Chinese Journal of Energetic Materials

基　　金：中央高校基本科研业务费专项(2024)。

摘　　要：为了提高Al/KClO_(4)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@TiO_(2)含能粒子,并用湿混造粒的方法制备了Al@TiO_(2)/KClO_(4)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@TiO_(2)/KClO_(4)药剂的微观形貌、成分组成、热分解性能与燃烧性能。采用密闭爆发器分别测试了Al/KClO_(4)及Al@TiO_(2)/KClO_(4)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@TiO_(2)复合颗粒,基于该颗粒制备的Al@TiO_(2)/KClO_(4)药剂表观活化能降低18%,燃烧热略低于Al/KClO_(4),TiO_(2)壳层的存在提升了Al和KClO_(4)的反应性能,Al@TiO_(2)/KClO_(4)药剂的输出压力标准差为0.13,较Al/KClO_(4)药剂的输出压力标准差0.28显著降低。To improve the reaction performance and reduce variations in the output pressure of Al/KClO_(4) pyrotechnic composi-tions,in-situ replacement method was applied to replace the inert layer of micron-sized aluminum with TiO_(2) layer.Scanning electron microscopy(SEM),X-ray diffraction(XRD),differential scanning calorimetry-thermogravimetry(TG-DSC)and ther-mal analysis were conducted to study the microstructure,composition,thermal and combustion properties of Al@TiO_(2) particles.The consistency of output pressure was analyzed through ignition experiments.The results show that aluminum coated with TiO_(2) layer is well prepared by in-situ replacement method.The explosives made with Al@TiO_(2) have an 18% lower in activation ener-gy(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 TiO_(2) layer,signifi-cantly improving the consistency of output pressure.

关 键 词：Al@TiO_(2)含能粒子 烟火药 原位置换法 输出压力 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O64[理学—物理化学]