多晶氢化锂粉末特性研究  

Properties of Polycrystalline LiH Powder

作　　者：李启寿[1] 杨维才[1] 杨勇[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900

出　　处：《稀有金属材料与工程》2013年第S2期359-362,共4页Rare Metal Materials and Engineering

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、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。Laser particle size analyzer,optical microscope and raman spectroscopy were used to determine ployscrystalline LiH powders' particle size,morphology,specific surface and hydrolysis process in low humidity(1.5%RH).Some exploratory researches about hydrolysate's treatment were also carried out.Empirical formula of LiH powders' specific surface is S=(2.4779/ρe)104/d(ρe=effective density,d=particle size.).With the LiH-H2O reaction going on,LiOH formed following Li2O,and the total amount of the reaction products shows paralinear rate behavior.The reaction products are changed after the hydrolyzed samples are treated with varied sintering techniques.Li2O is found after vacuum sintering in contrast with Li2O and LiOH after argon atmosphere sintering.In addition,the samples' reactive race is appreciably influenced by sintering treating.

关 键 词：氢化锂粉末 形貌 水解过程 

分 类 号：TB383.3[一般工业技术—材料科学与工程]