研究了机械球磨La1.8Ca0.2Mg14Ni3+x%Ti(质量分数,下同)(x=0,5,10)合金的微结构和储氢性能.气态吸放氢研究表明,加入钛粉球磨能有效提高合金的活化性能、储氢容量和吸放氢速率.铸态合金经过6次活化后,在613K时放氢量为4.12%(质量分数,下同).加Ti球磨改性10 h后,随着x增加,合金经过2次~3次循环基本完全活化,吸放氢性能也相应提高.Ti含量在.x=0,5,10时合金在613 K的放氢量分别为4.69%,4.80%,4.83%;当x=10时合金在373 K的吸氢量达到3%以上,在600 K经过2 min就能达到4.81%(为最大吸氢量的97%).微结构分析表明,具有表面催化活性的Ti粉与合金基体表面进行复合,并使合金发生部分非晶转变,能有效改善La1.8Ca0.2Mg14Ni3合金的储氢性能.
参考文献
[1] | Li Q;Lin Q;Jiang L J et al.[J].Journal of Alloys and Compounds,2004,368:101. |
[2] | Slattery D K .[J].International Journal of Hydrogen Energy,1995,20(12):971. |
[3] | Pezat M;Darriet B;Hagenmueller P .[J].JOURNAL OF THE LESS-COMMON METALS,1980,74:427. |
[4] | Spassov T;Rangelova V;NeyKov N .[J].Journal of Alloys and Compounds,2002,334:219. |
[5] | Wang Wei;Chen Changpin;Chen Lixin et al.[J].Journal of Alloys and Compounds,2002,339:175. |
[6] | Chi Hongzhong;Chen Changpin;Chen Lixin et al.[J].Journal of Alloys and Compounds,2003,360:312. |
[7] | Chi Hongzhong;Chen Changpin;Chen Lixin et al.[J].International Journal of Hydrogen Energy,2004,29(07):737. |
[8] | Cai Guangming;Chen Changpin;Chen Yun et al.[J].International Journal of Hydrogen Energy,2003,28(05):509. |
[9] | Gao Linhui;Chen Changpin;Chen Lixin et al.[J].Journal of Alloys and Compounds,2005,399:178. |
[10] | Hempelmann R .[J].Journal of the Less-Common Metals,1984,101:69. |
[11] | Choi W K;Tanaka T;Miyauchi R .[J].Journal of Alloys and Compounds,2000,299:141. |
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