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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Direct preparation of LiBH_4 from pre-treated LiH + B mixture at high pressure
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Direct preparation of LiBH_4 from pre-treated LiH + B mixture at high pressure

机译：在高压下由预处理的LiH + B混合物直接制备LiBH_4

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摘要

LiBH_4 was prepared from LiH + B mixture at 300-500 °C with a hydrogen pressure of 35 MPa. The LiH + B mixture was pretreated by ball milling under 10 MPa hydrogen pressure for 10h. The results showed that ball-milling treatment is favorable for the formation of LiBH_4, which could reduce the reaction temperature for about 200 °C. A small quantity of LiBH_4 could be found in the pre-treated sample. The formation of LiBH_4 from LiH+B mixture is a kinetically hindered progress and a diffusion-control reaction. LiBH_4 formed at 400 °C could release 6.59 wt.% H_2 when it was heated from room temperature to 500 °C. The yield of LiBH_4 is about 59.4%.
机译：LiBH_4由LiH + B混合物在300-500°C和35 MPa的氢气压力下制备。通过在10 MPa氢气压力下球磨将LiH + B混合物预处理10h。结果表明，球磨处理有利于LiBH_4的生成，可降低反应温度约200°C。在预处理的样品中会发现少量的LiBH_4。由LiH + B混合物形成LiBH_4是动力学受阻的过程，并且是扩散控制反应。从室温加热到500°C时，在400°C形成的LiBH_4可以释放6.59 wt。％H_2。 LiBH_4的产率为约59.4％。

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