| 机械球磨固相化学反应制备AlH_3 |
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| 引用本文： | 阎汝煦,毛松科,罗永春,刘刚,康龙.机械球磨固相化学反应制备AlH_3[J].兰州理工大学学报,2008,34(5). |
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| 作者姓名： | 阎汝煦 毛松科 罗永春 刘刚 康龙 |
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| 作者单位： | 兰州理工大学,甘肃省有色金属新材料重点实验室,甘肃,兰州,730050 |
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| 摘 要： | 以LiAlH4和AlCl3为原料,采用机械球磨固相化学反应方法合成铝氢化合物,通过XRD、TG-DSC和MS等方法对反应产物进行分析和表征,研究不同球磨时间对球磨反应体系合成产物的转变规律和对产物热力学性能的影响.结果表明,随着球磨时间的增加,合成反应按3LiAlH4 AlCl3→4AlH3 3LiCl方向进行并形成了非晶态铝氢化合物(AlH3),球磨20 h时反应基本完全.球磨产物的放氢失重温度主要集中在100～200 ℃,对应的DSC曲线在135 ℃和165 ℃出现2个放热峰,随球磨时间的增加,失重量减少,最大失重质量分数达到3.5%～6.1%.球磨过程中形成的反应产物LiCl*H2O及少量AlH3发生分解是影响球磨反应产物最大失重量的主要因素.
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| 关 键 词： | 机械球磨 固相化学反应 热力学性能 |
Preparation of AlH_3 with mechanical ball-milling solid-phase chemical reaction |
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| YAN Ru-xu,MAO Song-ke,LUO Yong-chun,LIU Gang,KANG Long.Preparation of AlH_3 with mechanical ball-milling solid-phase chemical reaction[J].Journal of Lanzhou University of Technology,2008,34(5). |
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| Authors: | YAN Ru-xu MAO Song-ke LUO Yong-chun LIU Gang KANG Long |
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| Institution: | YAN Ru-xu,MAO Song-ke,LUO Yong-chun,LIU Gang,KANG Long(State Key Lab.of Gansu Advanced Non-ferrous Metal Materials,Lanzhou Univ.of Tech.,Lanzhou 730050,China) |
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| Abstract: | Synthesis of AlH3 with LiAlH4 and AlCl3 was conducted by using ball-milling solid-phase chemical reaction.The reaction resultant was analyzed and characterized,and the effect of milling time on the transformation pattern of the synthesized resultants of the ball-milling reaction system and thermodynamic properties of the milled composites were investigated by using X-ray diffraction(XRD),thermal analysis(TG-DSC),and mass spectrum(MS).It was found that the ball-milling reaction took the course of 3LiAlH4+AlC... |
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| Keywords: | AlH3 |
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