采用机械合金化法制备了Mg2Ni-1.00%Pd(质量分数)合金粉末,用XRD及AFM等分析表征了材料吸放氢前后相和微观结构的变化,测定了Mg2Ni-1.00%Pd合金的吸放氢动力学曲线和PCT曲线.结果表明,机械合金化制备的Mg2Ni-1.00%Pd合金粉末颗粒尺寸在10～50 nm之间;添加1.00%Pd机械球磨,可显著地改善纳米Mg2Ni合金的吸/放氢动力学性能,在初始氢压为1.17 MPa、温度为423和473 K时,同熔炼法制备的合金相比,材料无需活化即可快速吸氢;PCT曲线上有明显的坪台区,而且坪宽较长,有一定的滞后效应且滞后系数随温度的升高而降低;同熔炼法制备的Mg2Ni合金相比,纳米Mg2Ni-1.00%Pd合金吸氢时的焓变值减小,放氢时焓变值增加,可逆贮氢容量为3.0% H2.
参考文献
| [1] | Zaluski L;Zaluska A;Str(o)m Olsen J O .Hydrogen absorption in nanocrystalline Mg2Ni formed by mechanical alloying[J].Journal of Alloys and Compounds,1997,217:295. |
| [2] | Janot, R;Aymard, L;Rougier, A;Nazri, GA;Tarascon, JM .Fast hydrogen sorption kinetics for ball-milled Mg2Ni alloys[J].The journal of physics and chemistry of solids,2004(2/3):529-534. |
| [3] | 袁华堂,冯艳,宋赫男,王一菁.镁基储氢合金改性的研究进展[J].化工进展,2003(05):454-458. |
| [4] | Song M Y;Park H R .Hydriding kinetics of Mg2Ni below the polymorphic transformation temperature of Mg2NiH4[J].International Journal of Hydrogen Energy,1995,20(10):805. |
| [5] | Sato T;Blomqvist H;Noréus D .Attempts to improve Mg2Ni hydrogen storage by aluminium addition[J].Journal of Alloys and Compounds,2003,356-357:494. |
| [6] | Song M Y;Pezat M;Darriet B et al.A kinetics study of the H-(Mg2Ni-2.7%Ni) system[J].Journal of the Less-Common Metals,1984,103:145. |
| [7] | Yang Huabin;Yuan Huatang;Ji Jingtao et al.Characteristics of Mg2Ni0.75M0.25(M =Ti,Cr,Mn,Fe,Co,Ni,Cu and Zn)alloys after surface treatment[J].Journal of Alloys and Compounds,2002,330-332:640. |
| [8] | 胡子龙.贮氢材料[M].北京:化学工业出版社,2002:49. |
| [9] | Gross K J;Spatz P;Züttel A et al.Mechanically milled Mg composites for hydrogen storage the transition to a steady state composition[J].Journal of Alloys and Compounds,1996,240:206. |
| [10] | Reilly J J;Wiswall R H .The reaction of hydrogen with alloys of magnesium and nickel and the formation of Mg2NiH4[J].Inorganic Chemistry,1968,7(11):2254. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%