| Title |
Temperature Dependence of the Chemical Hysteresis in the LaNi5 - H System |
| Authors |
민동준(Dong Joon Min); 박충년(Choong Nyeon Park) |
| Abstract |
A chemical hysteresis and its temperature dependence in the LaNi_5-H system have been investigated by using a Sievert-type apparatus. The initial hydrogenation rate was controlled by the valve opening and the initial hydrogen pressure of a hydrogen gas reservoir. The pressure-composition isothermss in LaNi_5-H measured at 10, 30, and 50℃ varied sensitively with the hydrogenation rate and the temperature, implying an existence of a chemical hysteresis and its temperature dependence in this alloy. The chemical hysteresis decreased with increasing the temperature. By an annealing treatment of the activated LaNi_5 the temperature dependence of the chemical hysteresis decreased remarkably. |