Nano Y2O3:Eu3+ fluorescence powder was prepared by thermal decomposition of the rare earth citric acid complexes.The structure,size,morphology and luminescent properties of fluorescence powder were investigated by mea...Nano Y2O3:Eu3+ fluorescence powder was prepared by thermal decomposition of the rare earth citric acid complexes.The structure,size,morphology and luminescent properties of fluorescence powder were investigated by means of XRD and TEM.The results show that the crystal structure of nano Y2O3:Eu3+fluorescence powder is cubic,and the size of the particles is between 20 nm and 60 nm.The phosphors has the maximum excitation peak at 248 nm,and the maximum emission peak at 615 nm.展开更多
金属钒具有吸氢量大、抗粉化性能好等优点 ,但是有效吸氢量较低 ,只有一半的氢能够释放出来 ,没有实用价值。在V Ti二元合金的基础上形成的三元合金V Ti M(M代表Cr,Mn ,Fe ,Ni等 )具有良好的贮氢性能。Ti/Cr比对V Ti Cr合金性能影响很大...金属钒具有吸氢量大、抗粉化性能好等优点 ,但是有效吸氢量较低 ,只有一半的氢能够释放出来 ,没有实用价值。在V Ti二元合金的基础上形成的三元合金V Ti M(M代表Cr,Mn ,Fe ,Ni等 )具有良好的贮氢性能。Ti/Cr比对V Ti Cr合金性能影响很大 ,Ti/Cr比值为 0 .75时V Ti Cr合金具有最大的贮氢量和有效吸氢量 ,同时热处理可以有效地提高V Ti Cr合金的有效吸氢量 ,并降低V的使用量。添加Mn的三元合金具有BCC和Laves相双相结构。V Ti Fe合金的贮氢量很高 ,并有希望利用便宜的钒铁做钒源。此外 ,V基固溶体合金还可以用于镍氢电池负极 ,如V Ti Ni合金具有很高的放电容量 。展开更多
文摘Nano Y2O3:Eu3+ fluorescence powder was prepared by thermal decomposition of the rare earth citric acid complexes.The structure,size,morphology and luminescent properties of fluorescence powder were investigated by means of XRD and TEM.The results show that the crystal structure of nano Y2O3:Eu3+fluorescence powder is cubic,and the size of the particles is between 20 nm and 60 nm.The phosphors has the maximum excitation peak at 248 nm,and the maximum emission peak at 615 nm.
文摘金属钒具有吸氢量大、抗粉化性能好等优点 ,但是有效吸氢量较低 ,只有一半的氢能够释放出来 ,没有实用价值。在V Ti二元合金的基础上形成的三元合金V Ti M(M代表Cr,Mn ,Fe ,Ni等 )具有良好的贮氢性能。Ti/Cr比对V Ti Cr合金性能影响很大 ,Ti/Cr比值为 0 .75时V Ti Cr合金具有最大的贮氢量和有效吸氢量 ,同时热处理可以有效地提高V Ti Cr合金的有效吸氢量 ,并降低V的使用量。添加Mn的三元合金具有BCC和Laves相双相结构。V Ti Fe合金的贮氢量很高 ,并有希望利用便宜的钒铁做钒源。此外 ,V基固溶体合金还可以用于镍氢电池负极 ,如V Ti Ni合金具有很高的放电容量 。