通过低能机械化学方法的氢化：MgB $_2$案例
Hydrogenation via a low energy mechanochemical approach: the MgB$_2$ case
摘要：
本工作的目的是调查的效果，在没有研磨介质的研磨过程中，粉末与壁面碰撞的能量传递需要对固-气反应。为此，选择在加压氢气气氛中由MgB $_2$合成Mg（BH $_4$）$_2$作为模型反应。MgB $_2$在广泛的一组研磨参数（即研磨时间和旋转方案）下研磨，并彻底表征所获得的产物。通过证明Mg（BH $_4$）$_2$的部分形成，该研究的结果表明，在研磨期间由粉末颗粒与腔室壁碰撞传递到粉末床的能量是不可忽略的，特别是当研磨过程长时间延长时。
英文摘要：
This work aims at investigating the effect that the energy transferred during powder-to-wall collisions in a milling process without grinding media entails on solid-gas reactions. For this purpose, the synthesis of Mg(BH$_4$)$_2$ from MgB$_2$ in a pressurized hydrogen atmosphere was chosen as a model reaction. MgB$_2$ was milled under a broad set of milling parameters (i.e. milling times and rotation regimes) and the obtained product thoroughly characterized. By proving the partial formation of Mg(BH$_4$)$_2$, the results of this investigation indicate that the energy transferred to the powder bed by the powder particles colliding with the chamber wall during milling is not negligible, in particular when the milling process is protracted for a long period.
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