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采用电弧熔炼法合成LaNi5合金,LaNi5合金破碎研磨制备粉末,然后对LaNi5合金粉末采用H2/H2O进行选择性氧化处理,制备Ni/La2O3粉末。分别对LaNi5合金粉末和Ni/La2O3粉末进行了XRD结构分析、扫描电镜形貌观察。XRD结构分析结果表明,电弧熔炼法合成了单一物相的LaNi5粉末;Ni/La2O3粉末除La2O3和Ni两相外,未见其它杂相。扫描电镜形貌观察发现LaNi5粉末与Ni/La2O3粉末形貌相同。对Ni/La2O3粉末测量XRD图谱中衍射峰的半高宽,采用Scherrer公式,计算了La2O3和Ni物相的晶粒度在10 nm~40 nm范围内。扫描电镜多点能谱分析表明,Ni/La2O3粉末元素含量分布均匀有望在催化剂材料中得到应用。
The LaNi5 alloy was synthesized by electric arc melting method, the LaNi5 alloy was crushed and ground to prepare the powder, and then the LaNi5 alloy powder was selectively oxidized with H2 / H2O to prepare the Ni / La2O3 powder. The structure of LaNi5 alloy and Ni / La2O3 powders were analyzed by XRD, and the morphologies of the samples were observed by SEM. The results of XRD showed that single phase LaNi5 powder was synthesized by arc melting method. No other heterogeneous phase was found in the Ni / La2O3 powder besides La2O3 and Ni phases. Scanning electron microscopy showed that LaNi5 powder had the same morphology as Ni / La2O3 powder. The half width of the diffraction peak in the XRD pattern of Ni / La2O3 powder was measured. The Scherrer formula was used to calculate the grain size of the La2O3 and Ni phases in the range of 10 nm to 40 nm. Scanning electron microscopy (EDS) multi-point EDS analysis showed that the uniform distribution of Ni / La2O3 powder content is expected to be applied in the catalyst materials.