期刊论文

Microstructures and Dehydrogenation Properties of Ball-milled MgH_2-K_2Ti_6O_(13)-Ni Composite Systems

Zhang, Jian(zj4343@163.com)

中文

材料工程

1001-4381

2016

44

11

101-106

10.11868/j.issn.1001-4381.2016.11.017

国家自然科学基金资助项目(51401036) 湖南省教育厅创新平台开放基金(16K001 ) 湖南省自然科学基金资助项目(14U3086 ) 能源髙效清洁利用湖南省重点实验室开放基金资助项目(2015NGQ005 )

本校为第一且通讯机构

采用机械球磨法制备了K_2Ti_6O_(13)晶须单独掺杂、以及K_2Ti_6O_(13)晶须与Ni粉复合掺杂的MgH_2储氢复合体系,并通过XRD,SEM,DSC等检测手段对其微观结构与解氢性能进行表征。结果表明:当K_2Ti_6O_(13)晶须单独掺杂于MgH_2时,K_2Ti_6O_(13)晶须起到助磨细化MgH_2晶粒的作用,同时还抑制了MgH_2颗粒的团聚,有效降低了MgH_2基体的解氢温度,且当K_2Ti_6O_(13)与MgH_2质量配比为3∶7时,MgH_2解氢性能的改善效果尤为明显,其解氢温度较纯MgH_2球磨体系降低了近75℃;此外,当K_2Ti_6O_(13)晶须和Ni粉末复合掺杂于MgH_2时,得益于K_2Ti_6O_(13)晶须的助磨细化MgH_2晶粒以及Ni固溶于MgH_2晶格致使其结构稳定...

The K2Ti6O13 whisker separate-doped and K2Ti6O13 whisker and Ni powder multi-doped MgH2 hydrogen storage composite systems were prepared by mechanical milling method. The microstructures and dehydrogenation properties of the prepared samples were characterized by some testing methods such as X-ray diffraction (XRD), scanning electron microscope (SEM) and differential scanning calorimeter (DSC). The results show that the K2Ti6O13 whisker not only plays the roles in refining the MgH2 crystalline grain, but also inhibit the agglomeration of MgH2 p...