论文部分内容阅读
在真空系统中的氘压低于 0 1MPa条件下研究了金属镱的吸氘性能 ,并对不同原子比的氘化物的物相进行了分析。在常压、3 0 0℃下 ,金属镱吸氘不明显 ;40 0℃时 ,金属镱经较长时间活化后吸附一定量的氘 ;5 0 0℃时 ,镱升华。 40 0℃时的吸氘实验结果表明 :从活化至开始吸氘直至吸附平衡需很长时间 ;氘 /镱原子比的高低与吸氘时间有关 ,饱和吸氘时的原子比最大为 2 0 0 ;金属镱为面心立方 (fcc)结构 ,a0 =0 .5 492nm。具有不同原子比的氘化镱的X射线衍射 (XRD)分析结果显示 :氘化镱有 2种结构 ,即面心立方结构 (a0 =0 .5 2 4nm)和正交结构 (a0 =0 .5 88nm、b0 =0 .3 5 8nm、c0 =0 .678nm ) ;金属镱吸氘后 ,立方结构氘化镱晶格常数及晶胞体积均发生收缩现象 ,收缩率分别约为 4%和 11%。正交结构氘化镱晶胞体积收缩约 14 %。
The deuterium absorption properties of ytterbium metal were studied under the condition that the pressure of deuterium in the vacuum system was lower than 0 1MPa, and the phase of deuteride with different atomic ratio was analyzed. At atmospheric pressure, 300 ° C, ytterbium metal deuterium absorption is not obvious; 40 0 ° C, the metal ytterbium after activation for a long time to adsorb a certain amount of deuterium; The results of deuterium absorption experiment at 40 ℃ show that it takes a long time to get deuterium until the equilibrium of adsorption. The atomic ratio of deuterium to ytterbium is related to the deuterium absorption time, and the maximum atomic ratio of saturated deuterium is 200 ; Ytterbium metal is a face centered cubic (fcc) structure, a0 = 0.5492 nm. X-ray diffraction (XRD) results of ytterbium deuteride with different atomic ratios show that ytterbium deuteride has two kinds of structures, namely, face-centered cubic structure (a0 = 0.54 4 nm) and orthogonal structure (a0 = 5 88nm, b0 = 0.385nm, c0 = 0.688nm). After the metal ytterbium absorbs deuterium, the lattice constants and unit cell volume of ytterbium deuteride shrink. The shrinkage is about 4% and 11%, respectively %. Orthogonal structure ytterbium deuteride unit cell volume contraction of about 14%.