共查询到20条相似文献,搜索用时 113 毫秒
1.
从汤森路透、Proquesft Dialog数据库中检索有关稀土发光材料的专利数据,并利用TDA、TI、INNOGRAPHY软件进行分析,探讨稀土发光材料的研发现状及其近年来的研发动向,分析主要国家的技术研发方向和市场布局,比较核心研发企业的专利技术布局、技术方向、竞争结构、技术强度和市场强度,从微观层面研判及预测稀土发光材料的未来技术走向。分析结果表明:中国在稀土发光材料领域申请专利数量位居全球第一;美国和日本在专利质量方面占优;全球稀土发光材料研发方向方面,中国研发方向单一,美国、日本和韩国在诸多研发方向上有较强交叉,表现在红光荧光体组合物、闪烁体组合物、β-Sialon稀土发光材料、纳米稀土发光材料和多晶稀土发光材料等方向。中国企业应该利用节能照明工程方面的政策优势,注重该领域高技术水平发展;同时应充分发挥稀土矿的优势,在涉及钇的发光材料等方向加强研发。 相似文献
2.
纳米YVO4:Ln(Ln=Eu,Tm,Dy)发光粉的研制及与相应块体发光粉的光谱对比 总被引:2,自引:0,他引:2
采用络合溶胶—凝胶法合成出3种YVO4∶Ln(Ln=Eu,Tm,Dy)纳米发光粉,并且对纳米YVO4∶Ln与自合成的块体YVO4∶Ln的红外光谱(FTIR),荧光光谱和X-射线衍射以及粒径的分布进行了对比研究。实验结果证明,当钒基稀土发光材料粒径达到纳米级以后,由于纳米粒子的一些特性,导致发光材料的光谱与块体材料相比有了较大的不同,出现了不同程度的蓝移现象。并且纳米发光材料的发光强度较块体发光材料的强度有一定程度的增强。 相似文献
3.
4.
5.
6.
对稀土的发光类型进行了简要阐述,对不同发光类型的发光原理进行了论述,并介绍了稀土发光材料在照明显示、无机离子和生命分析检测及矿物分析等领域中的应用,最后对我国稀土材料研究的未来发展提出总结与展望. 相似文献
7.
8.
9.
10.
11.
12.
以1985-2015年Web of Science(WoS)数据库中已发表的学术论文为基础,利用科学知识图谱分析软件VOSviewer和Sci2工具包对国际稀土研究领域进行可视化分析.首先,通过文献共被引分析稀土研究的知识基础;其次,通过关键词共现分析探测稀土研究前沿;最后,通过突现检测分析稀土研究趋势,并结合我国稀土研究的特点和现状,对我国稀土研究进行综述.结果表明,中国的发文量在国家/地区中居于首位,中国科学院在相关机构中发文量最多;稀土研究知识基础的重要文献形成3个聚类;稀土研究的前沿主题主要为稀土发光材料、稀土永磁材料、稀土储氢材料、稀土化合物和化学合成法5个聚类;稀土研究趋势主要的突现关键词包括稀土化合物、荧光粉等方面. 相似文献
13.
硅酸镁锶(Sr2MgSi2O7)作为目前常用的一种长余辉发光材料基质,性能稳定,耐酸碱性能良好。本文介绍了长余辉发光材料的发光原理,综述了近年来Sr2MgSi2O7长余辉发光材料的主要制备方法以及稀土掺杂Sr2MgSi2O7材料的研究进展,并对该材料的发展做出了展望。制备Sr2MgSi2O7长余辉发光材料的方法主要包括高温固相法,溶胶-凝胶法,化学沉淀法和燃烧合成法,其中最常用的为高温固相法。通过掺杂稀土离子可以形成具有不同发光特性的长余辉发光材料。稀土掺杂Sr2MgSi2O7材料作为一种储能、节能的长余辉发光材料,展现出了广阔的发展和应用前景。 相似文献
14.
15.
LB films of 4-hexadecyloxybenzoic-terbium by using the subphase containing Tb^3 were prepared. The mono-layer behavior of 4-bexadecyloxybenzoic acid (HOBA) on the subphase containing rare earth ions was studied. IR and UV spectra show that the rare earth ions were bound to carboxylic acid head groups and the coordination took place between the polar head group and the rare earth ions. The luminescence spectra show that the LB films have the fine luminescence properties, and the LB films emit strong luminescence under UV light irradiation. 相似文献
16.
17.
The europium complex, Eu3 -1,10-phenanthroline (Phen) -acrylic acid (AA) was prepared and its structural formula is Eu(Phen) (AA)3. The high luminescence rare earth polymer materials were obtained by the copolymerization of europium complex with methyl methacrylate using AIBN as an initiator. The copolymer structure and properties were characterized by FT-IR, UV-Vis, RF spectra and thermogravimetric analysis (TG). Results indicate that block copolymer is synthesized. Fluorescent property shows that Eu copolymer emits rare earth fluorescence and the emission intensity increases with the rise in Eu content and reaches a maximum value. 相似文献
18.
《中国稀土学报(英文版)》2022,40(9):1437-1444
The design and fabrication of rare earth ions incorporated into the inorganic/organic hybrid materials have attracted growing attention for seeking improved optical properties and photofunctional performances. In this paper, a novel hybrid composite based on the layered rare earth hydroxides was successfully prepared by the ion-exchange and intercalation chemical process. The rare earth elements in the composite contain gadolinium (Gd) and europium (Eu) and the molar ratio of Gd to Eu is kept constant at 1.9 : 0.1. Organic sodium dodecyl sulfonate and dye coumarin-3-carboxyllc acid are simultaneously incorporated into the layered rare earth hydroxides as supporting agent and light-harvesting antenna, respectively. The resulting hybrid layered rare earth hydroxides exhibit the enlarged interlayer distance with about 2.60 nm, and the chemical composition was confirmed through X-ray diffraction, carbon, hydrogen and nitrogen (CHN) elemental analysis, infrared spectroscopy, and thermogravimetric analysis. The layered solid compound shows the characteristic red emission corresponding to the 5D0→7F2 transition of Eu3+ ion, and the luminescence intensity of the optimized compound is greatly enhanced as compared to its corresponding nitrate and the hybrid composite without the introduction of dye molecule. The hybrid layered rare earth hydroxides can be exfoliated into bright colloidal solution, which show superior recognition capability to Cu2+ ion with the distinct luminescence quenching. The large quenching constant (1.4 × 104 L/mol) and low detection limit (0.35 μmol/L) are achieved for Cu2+ ion, implying a “turn-off” fluorescent sensor for Cu2+ detection. Moreover, a transparent film was prepared based on the colloidal solution and displays the typical red emission in folded shape. The new hybrid compound with enhanced luminescence and excellent photofunctional performances is expected to be applied in the fields of fluorescent sensing and flexible optical devices. 相似文献
19.
Based on practical situation of rare earth industrial chain,production process and rare earth materials that could produce solid wastes on batch were discussed.Formation cause,formation volume,composition analysis and comprehensive utilization of the solid wastes of rare earth hydrometallurgy slag,electrolysis slag,Fe-based rare earth permanent magnetic materials,Co-based rare earth permanent magnetic materials,rare earth hydrogen storage materials,rare earth polishing powders and rare earth catalysts were ... 相似文献