【作者】 李启寿； 杨勇； 程亮；

【Author】 LI Qi-shou;YANG Yong;CHENG Liang;Materials Institute,CAEP;

【机构】 中国工程物理研究院材料研究所；

【摘要】 以氢化锂粉末为研究对象,利用激光粒度分析仪、光学显微镜、比表面积分析仪观测试样的粒度、形貌、比表面积及压缩性能,利用称重法及拉曼光谱仪观测试样在低湿度条件(1.5%RH)下的水解过程。研究结果表明,氢化锂粉末比表面积的经验计算公式为S=(2.4779/ρe)104/d(ρe为颗粒有效密度,d为颗粒平均径);氢化锂粉末的lg M值(M=压制模量)随着粒度的减小先减小后增大,在-40目处为最小值1.554;氢化锂粉末在低湿度下水解过程呈半线性速率行为,其水解速率随着氢化锂试样粒度的降低逐渐增大,水解过程中先生成Li2O,后生成Li OH,试样表面水解产物(Li OH+Li2O)。更多还原

【Abstract】 In this paper, polycrystalline Li H powders’ particle size, morphology, specific surface, apparent density, tap density and hydrolysis process in low humidity(1.5%RH) were determined with laser particle size analyzer, optical microscope and raman spectroscopy methods. Empirical formula of Li H powders’ specific surface is S=(2.4779/ρe)104/d(ρe=effective density, d=particle size.). The lg M(M=compressive ratio) of Li H samples first decreases and then increases with the decreasing of particle size and it reached minimum when the particle size is-40 mesh. With the Li H-H2 O reaction going on, Li OH formed following Li2 O, the total amount of the reaction products showed paralinear rate behavior; and the hydrolysis rate of Li H powder increases with the decreasing of particle size.更多还原