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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、拉曼等观测氢化锂粉末的粒度、形貌、比表面积及其在低湿度条件(1.5%RH)下的水解过程,探索试样表面水解产物的处理技术。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为颗粒平均粒径);氢化锂粉末在低湿度下水解过程呈半线性速率行为,水解过程中先生成Li2O,后生成LiOH,试样表面水解产物为LiOH+Li2O;采用真空烧结和充氩烧结处理潮解360 min后的试样,发现真空烧结后试样表面产物为Li2O,充氩烧结后试样水解产物为LiOH+Li2O,试样水解速度略有改变。
Taking lithium hydride powder as the research object, the particle size, morphology, specific surface area and the hydrolysis process under low humidity (1.5% RH) were observed by laser particle size analyzer, optical microscope and Raman. Like surface hydrolyzate processing technology. The experimental results show that the empirical formula of specific surface area of lithium hydride powder is S = (2.4779 / ρe) 104 / d (ρe is the effective density of the particles and d is the average particle size of the particles). Lithium hydride powder is semi- Li2O and LiOH were formed after hydrolysis, and LiOH + Li2O was the hydrolysates on the surface of the sample. The sample after deliquesced for 360 min by vacuum sintering and argon-filled sintering showed that the surface of the sample after vacuum sintering was Li2O After hydrogenation, the hydrolysates of the samples were LiOH + Li2O, and the hydrolysis speed of the samples changed slightly.