| Title |
Thermal Analysis of Mg Hydride by Sievert`s Type Automatic Apparatus |
| Authors |
한정섭(Jeong Seb Han); 박경덕(Kyung Duck Park) |
| DOI |
https://doi.org/10.3365/KJMM.2010.48.12.1123 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Hydrogen absorbing materials; powder processing; decomposition; thermal analysis; magnesium hydride |
| Abstract |
In order to apply the Sievert`s type automatic apparatus to thermal analysis of hydrogen absorbing materials, the dehydrogenation of the Mg-H system was investigated. As the initial wt% of hydrogen was increased to 4.4, the peak temperature of evolution rate shifted to higher temperature. However, with the initial wt% of hydrogen higher than 4.4, peak temperature of evolution rate did not change. The peak temperatures of evolution rate obtained by automatic apparatus were almost the same as those measured by a manual apparatus. As the heating rate was increased, the peak temperatures increased; the peak temperatures for heating rates 1, 2 and 3 K/min were 664, 687 and 702 K, respectively. The activation energy for the decomposition of Mg hydride was 101 kJ/mol. The Sievert`s type automatic apparatus can be successively applied to the thermal analysis of metal hydride. |