摘要
借助于XRD、TG-DSC和SEM等技术研究了掺钛对氢化燃烧合成镁镍储氢合金的合成条件及合金性能的影响。结果表明:掺钛使Mg2NiH4的合成温度有一定的提高,600℃时才能大量生成Mg2NiH4;氢压的提高有利于Mg2NiH4的形成,而过高的合成温度和过长的保温时间将不利于Mg2NiH4的形成;钛的掺入使Mg2NiH4的晶胞有一定的增大;掺钛的Mg2NiH4放氢分解温度为259.8℃,比未掺钛的降低了120℃左右;掺钛试样的总放氢量为2.43%;掺钛试样在300℃、0.1MPa下的吸放氢时间为6min,活化可适当提高吸放氢量。
The effect of doping Ti on synthesis of magnesium nickel hydrogen storage alloys through XRD, TGDSC and SEM was reported. The results indicate that the synthesis temperature of the samples doped with Ti increases and a large numbers of Mg2NiH4 synthesize at 600℃. The increase of hydrogen pressure would cause the increase of Mg2NiH4. Higher synthesis temperature and longer duration time would be against the increase of Mg2NiH4. Dehydriding temperature of the samples doped with Ti is about 259.8℃ which is about 120℃ lower than that of undoped samples. For the samples doped with Ti the dehydriding content is 2.43%, and dehydriding time is commonly 5-10min at 300℃, 0. 1MPa. Activation could improve hydriding and dehydriding content.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2006年第1期95-97,101,共4页
Journal of Functional Materials
基金
四川省杰出青年基金资助项目(02ZQ026-047)
四川省重点科技资助项目(02GG009-011)
中小科技型企业科技创新基金资助项目(01c26215100907)
关键词
氢化燃烧合成
钛
MG2NIH4
镁镍储氢合金
hydriding combustion synthesis
Ti
Mg2NiH4
magnesium nickel hydrogen storage alloys
