镁基储氢合金粉末的微包覆方法

ENCAPSULATION OF Mg-BASED HYDROGEN STORAGE ALLOY POWDER

研究出一种方法，在含Ｆ－的酸性溶液中，成功地在镁基储氢合金粉末颗粒表面包覆一层ＮｉＰ复合层，并给出了最佳包覆条件，可以容易而有效地控制包覆量。包覆层中磷的含量为３～５％。采用ｘ射线衍射、扫描电镜分析、光电子能谱分析等方法对包覆层进行了检测。

? Mg-based hydrogen storage alloy powder was microencapsulated successfully with a Ni-P composite layer in acid solution containing F- ion The weight increase of Ni-P microencapsulated layer could be controlled easily The content of P in the microencapsulated layer was 3～ 5% The x-ray diffractionanalysis (XRD) indicated that the crystal structure of Mg-based alloy was not affected in process of microencapsulating The SEM images showed that surface of coated alloy powder was encapsulated compactly by spherical particles, while the surface of uncoated alloy powder particle was smooth The XPS analysis indicated that the Ni in coated layer is of free state The encapsulated Mg-based alloy powder was of great anti-corrosion ability in the base solution