Magnesium indium solid solution and preparation method thereof

The invention discloses magnesium indium solid solution and a preparation method thereof. The preparation method comprises the following steps of: preparing a sample A in a molar ratio of magnesium powder to indium powder of (100-x):x, wherein x is more than 0 and less than 12; mixing the sample A on a ball mill to obtain mixed powder B, and then pressing and forming to obtain a green body C; introducing argon in a vacuum furnace for protecting and sintering the green body C, crushing the sintered green body C, and then performing ball-milling on the crushed green body C in an argon atmosphere to obtain the magnesium indium solid solution; and adding an appropriate amount of indium to prepare the magnesium indium solid solution. Therefore, a hydrogen adsorption and desorption reaction path of the magnesium is changed so as to achieve the effects of reducing hydrogen adsorption and desorption enthalpy change and reducing the stability of thermodynamics of magnesium hydride (MgH2). A magnesium indium alloy also has high reversibility, and the problem of irreversibility or low reversibility is solved.