储氢合金LaNi_(4.2)Mn_8的HD过程分析  

Analysis of HD Process of Hydrogen Storage Alloys LaNi_(4.2) Mn_8

作　　者：刘新[1] 罗永春[2] 康龙[2] 

机构地区：[1]渝州大学机械系,重庆400033 [2]甘肃工业大学材料系,兰州730050

出　　处：《渝州大学学报》2001年第1期32-36,共5页

基　　金：甘肃省自然科学基金资助项目

摘　　要：用热力学DTA的方法分析储氢合金LaNi4 .2 Mn.8的HD过程 ,并采用K值法定量计算讨论动力学因素温度、时间、压强对HD过程的影响 ,发现温度对反应的影响最大 ,当温度 5 0 0℃时 ,反应转换率为 10 .5 0 % ,而 80 0℃时转换率为 91.39%。最后制定出合理的HD实验条件 :T =70 0℃ ,t=4h ,P =2 5atm ,在此条件下 ,歧化反应转换率为 10 0 %。DTA was used to analyse the thermodynamics process of HD of hydrogen storage alloys LaNi 4.2 Mn .8 ,and the influences on HD process which were generated by the dynamics faciors such as temperature,time and pressure,were determined by the k value method.The results show that temperature played the main role in HD process.The conversion rate was 10.5% at 500℃,then 91.39% at 800℃. At last,the reasonable experimental terms were decided; P =700℃, t =4h. P =25atm. Under these terms,the conversion rate of disproportionated reaction was 100%.

关 键 词：DTA K值法 动力学因素 转换率 储氢合金 HD过程 歧化反应 

分 类 号：TG139.7[一般工业技术—材料科学与工程] TG115.25[金属学及工艺—合金]