Hydride Metallurgy : Combustion Synthesis of Metal Hydride and Its Physical Property

熔炼法不能生产出蒸气压相差很大的纯合金。此外，熔炼法的严重问题是加氢速度很慢，反应温度仍然偏高。还需要对产物进行活化处理。为了解决这一问题，我们提出了利用固体间自传播的高放热现象进行高氢压下的燃烧合成。因此，从根本上研究了高压氢气气氛下的燃烧合成，将粉末充分混合，然后点燃样品的一端。结果，在没有任何蒸发损失的情况下，成功完成了产品的成分控制。通过改变原料条件、压力和温度，氢气的储存量和反应速率也得到了显著提高。

The melting method can not produce pure alloy with largely different vapor pressure. In addition, the serious problem of the melting method is that hydrogenation rate is very slow and reaction temperature is still on high side. The activation treatment of the product is also needed. To solve the problems, we proposed the combustion synthesis under high hydrogen pressure by using the self-propagating high exothermic phenomenon between solids. Therefore, the combustion synthesis at high-pressure hydrogen atmosphere was fundamentally studied, in which powders was well mixed, and then one end of the sample was ignited. As a result, the composition control of the product was successfully completed without any evaporation loss. The storage capacity of hydrogen and reaction rate were also considerably improved by changing operating conditions of raw material, pressure and temperature.