Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1624870 | Journal of Alloys and Compounds | 2008 | 4 Pages |
Abstract
The perovskite-type hydrides, MMgH3 (M = Na, K, Rb) were synthesized by ball-milling. They decomposed at the temperatures of 673-723 K in several ways depending on M. Namely, NaMgH3 decomposed in the two-step reactions, NaMgH3 â NaH + Mg + H2 and NaH â Na + (1/2)H2, whereas KMgH3 decomposed in the single-step reaction, KMgH3 â K + Mg + (3/2)H2. However, RbMgH3 decomposed in the two-step reactions, but each reaction still remained uncertain. Judging from the experimental value of ÎH for MMgH3 (M = Na, K, Rb), the phase stability was found to change in the order, RbMgH3 > KMgH3 > NaMgH3, so that NaMgH3 is the most unstable among them.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
K. Komiya, N. Morisaku, R. Rong, Y. Takahashi, Y. Shinzato, H. Yukawa, M. Morinaga,