TiO_(2)原位包覆提升球形纳米铝粉活性  

In-situ coating of TiO_(2) enhances the activity of spherical nano-sized aluminum powder

作　　者：李丹 佟乐乐 王飞[1] 成琦 毛健[1] LI Dan;TONG Le-le;WANG Fei;CHENG Qi;MAO Jian(College of Materials Science and Engineering,Sichuan University,Chengdu 610065,China;Sichuan Aerospace Chuannan Fireworks Technology Co.,Ltd,Luzhou 646000,China)

机构地区：[1]四川大学材料科学与工程学院,四川成都610065 [2]四川航天川南火工技术有限公司,四川泸州646000

出　　处：《化学研究与应用》2024年第3期623-627,共5页Chemical Research and Application

基　　金：2021年度四川大学泸州市人民政府战略合作项目(2021CDLZ-1)资助。

摘　　要：纳米铝(Al)粉是一种高能金属纳米粉末,但过高的表面能带来的易氧化问题显著降低其活性,限制其应用。针对该问题,本文通过液相法在去除球形纳米Al粉表面氧化层的同时原位生长TiO_(2)包覆层,通过工艺优化,获得了活性Al含量最高的Al@TiO_(2)复合粉体,包覆层厚度约为2 nm,且粉末中没有过量的TiO_(2)存在,包覆处理后的复合粉体中活性Al含量达到87.3%。Nano-aluminum(Al) powder is a high-energy metal nano-powder,but its reactivity is significantly reduced due to the issue of oxidation caused by high surface energy,which limits its applications.To address this problem,this study employed a liquidphase method to simultaneously remove the surface oxide layer of spherical nano-Al powder and grow an in-situ TiO_(2) coating.Through process optimization,the Al@TiO_(2) composite powder with the highest active Al content was obtained,with a coating thickness of approximately 2 nm.There was no excessive TiO_(2) present in the powder,and the active Al content in the coated composite powder reached 87.3%.

关 键 词：纳米Al粉 TiO_(2)包覆 活性 

分 类 号：O614.4[理学—无机化学]