詹 鋒2，鄭 強(qiáng)2，尉秀英2
(1. 北京科技大學(xué) 物理化學(xué)系，北京 100083；
2. 北京有色金屬研究總院，北京 100088)
摘 要: 用氫化燃燒法合成了Mg2Ni，PCT實(shí)驗(yàn)結(jié)果說明了合成的鎂基貯氫合金具有很高的活性和高貯氫量，553K時(shí)達(dá)到3.40％。對(duì)Mg-Ni系的PCT結(jié)果作了處理，得出溫度和氫平衡壓的關(guān)系式：吸氫時(shí)lg(p/0.1MPa)=-3469/T+6.639； 放氫時(shí)lg(p/0.1MPa)=-3558/T+6.612。 用ＸＲＤ方法進(jìn)行了物相分析，表明存在在Mg2Ni的氫化物。
關(guān)鍵字: 氫化燃燒；貯氫合金；Mg2Ni
hydriding combustion synthesis
ZHOU Guo-zhi1,ZHAN Feng2, ZHENG Qiang2,
WEI Xiu-ying2
（1. Department of Physic Chemistry,
University of Science and Technology Beijing,
Beijing 100083, China;
2. General Research Institute for Nonferrous Metal,
Beijing 100088, China）
Abstract:A high activity and large capacity of hydrogen storage alloy Mg2Ni produced by hydriding combustion synthesis were investigated by means of pressure-composition isotherms(PCT). The amount of hydrogen absorbed by Mg2NiH4 reached the maximum value of 3.40% at 553K, which is near the theoretical value just after synthesis without any activation process. The relationships between the equilibrium plateau pressure and the temperature were discussed for hydriding and dehydriding. Phases of hydrogen storage alloy Mg2Ni were analyzed by X-ray diffraction(XRD).
Key words: hydriding combustion; hydrogen storage alloys; Mg2Ni
