摘要
样品在氩气氛下采用高频感应炉制备,所有样品经过均匀化热处理。在20,40和60℃下测量CeNi_(5-x)Cu_x饱和吸氢量,吸氢动力学曲线和放氢曲线。 在20和40℃,CeNi_3Cu_2压力一组成等温图中有较宽和明显的平台压力区,吸、放氢速度较快。若用Cu取代CeNi_5中部分Ni则成本可有所降低。CeNi_3Cu_2是很有发展前途的贮氢材料。CeNi_5和CeNi_4Cu在相同条件下不具有吸氢性能。CeNi_(5-x)Cu_x具有CaCu_5结构。
The samples were produced by melting the materials in an induction furnace under argon atmosphere. All samples were homogenized by heat treatment. For each of these compounds (CeNi5-xCux), the maximum hydrogen-absorption capacity, dynamic isotherms of hydrogen absorption, as well as hydrogen-desorption curves were measured in the temperature of 20, 40 and 60℃ .The pressure-composition isotherms with well-defined flat plateaux were obtained in the temperature of 20 and 40℃ for CeNi3Cu2. The velocities of absorption and des-orption are fast. Substitution of copper for nickel causes lower alloy cost. The results show that CeNi3Cu2 is a promising material for technical application in hydrogen storage. CeNi5 and CeNi4Cu haven't characteristics of hydrogen-absorption in the same experimental condition. CeNi5-xCux crystallize with CaCu5 structure.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1992年第2期129-133,共5页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金
关键词
吸氢性能
饱和吸氢量
镍合金
稀土
CeNi5-xCux
Hydrogen-absorption characteristics
Maximum hydrogen absorption capacity
Dynamic isotherms of hydrogen absorption
Hydrogen desorption isotherms
