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稀土高分子材料是通过稀土金属与高分子的复合而制备的一类兼具稀土光、电、磁等特性和高分子质轻、抗冲击和易加工等优良综合性能的功能材料。通过配位或聚合的方法将稀土离子键合到高分子链上而获得高分子稀土金属配合物是20世纪80年代才出现的一类稀土有机材料,这类兼有稀土离子的光、电、磁特性和有机高分子优良的材料性能的功能材料,因可能作为荧光、激光和磁性材料等而引起人们极大的兴趣。 相似文献
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This review focuses on the recent research progress in the multi-component assembly of luminescent rare earth hybrid materials, which is based on the luminescent rare earth compounds and two or more other building units, including the other photoactive species. It covers the multi-component luminescent rare earth hybrids which was assembled with different (a) organic-inorganic polymeric units, (b) nanoporous units, (c) nanoparticle composites or (d) other developing special units. Finally, future challenges and opportunities in this field are discussed. Herein it mainly focuses on the work of Yan's group in recent years. 相似文献
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稀土分析检测方法标准述评 总被引:2,自引:0,他引:2
从稀土矿、稀土精矿、稀土金属及其氧化物、稀土深加工产品等方面概述我国稀土分析国家标准体系.其中稀土配分、三氧化二铝、稀土总量、水分、灼减量等参数的检测,是稀土交易和萃取分离工艺过程中重要的技术指标;而钕铁硼、灯用稀土三基色荧光粉、稀土硅铁合金等分析标准,对于稀土磁性材料、稀土发光材料、稀土合金等稀土深加工产品的生产都有重要的指导意义;稀土产品及分析方法的建立,完善了稀土国家标准体系,满足了稀土生产和贸易的需要,促进了稀土行业持续健康发展. 相似文献
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稀土高分子材料是通过稀土金属与高分子的复合而制备的一类兼具稀土光、电、磁等特性和高分子质轻、抗冲击和易加工等优良综合性能的功能材料.通过配位或聚合的方法将稀土离子键合到高分子链上而获得高分子稀土金属配合物是20世纪80年代才出现的一类稀土有机材料,这类兼有稀土离子的光、电、磁特性和有机高分子优良的材料性能的功能材料,因... 相似文献
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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
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近年来,稀土氨基酸配合物因其优异的物理化学性能被广泛的应用在光学、生物工程和医学等方面。稀土氨基酸配合物在药学中的应用极大地推进医学与农业的发展和创新。医药方面,大量实验研究证明稀土氨基酸配合物能抑制癌症、肿瘤细胞的生长,可以用作癌症肿瘤病人的化疗药物;稀土氨基酸配合物可以抑制细菌、真菌的生长,治疗某些细菌真菌引起的疾病;稀土氨基酸配合物可以针对性的选择、改变DNA结构,从而治疗某些基因问题产生的疾病。农业上,稀土氨基酸配合物作为农药,既可直接提高农作物的产量,同时也能抑制真菌类的生长,间接促进农作物生长。 相似文献
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《中国稀土学报(英文版)》2019,37(11):1237-1241
The luminescent rare earth (RE) complex based multifunctional nanocomposites offer new potential applications of multimodal imaging (magnetic resonance imaging (MRI), fluorescent bioimaging, etc.) that can be associated with therapeutic activities. In this study, we report some results obtained with novel multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites that are composed of europium(III) complex with 1-(2-naphthoyl)-3,3,3-trifluoroacetone ligands (NTA) (Eu(NTA)3) and superparamagnetic Fe3O4 nanoparticles. These nanocomposites were functionalized with an amine group for biomedicine application. The multifunctional Fe3O4/Si-amine/Eu(NTA)3 nanocomposites exhibit both good magnetic behavior of Fe3O4 nanoparticles as a core and strong fluorescent property of europium(III) complex. Their characterizations were analyzed by XRD, SEM, EDX and FTIR spectra. The optical properties were studied in detail by UV-VIS spectra and luminescent emission spectra. The magnetic property was estimated by VMS. The effect of concentrations of luminescent Eu(NTA)3 complex on luminescent and magnetic properties is discussed. 相似文献
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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
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随着社会的发展,科学技术的不断提高,人们发现稀土金属在提高产品质量、增强产品性能等方面已表现出其独特的优势,但也存在稀土材料传统制备方法周期长、高端应用领域研究不够深入等问题.文中主要介绍了离子交换法、热分解法、水热/溶剂热法、共沉淀法和溶胶-凝胶法等制备稀土材料的最新进展,并着重介绍了稀土在永磁材料、发光材料、催化材... 相似文献
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ResearchandDevelopmentofRareEarthAdvancedMaterialsinChinaWangDianzuo(王淀佐),WanQun(万群),YangYuchun(杨遇春)(GeneralResearchInstitute... 相似文献
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随着稀土永磁材料应用领域的扩大及需求量的猛增,导致关键稀土元素(Pr、Nd、Dy、Tb)的过度使用,而高丰度稀土元素(La、Ce、Y)却不断积压.高丰度稀土永磁材料不仅可以降低成本,还可实现稀土资源综合平衡利用,出于国家战略安全和原材料成本角度考虑,高性价比的高丰度稀土永磁材料的研究与开发势在必行.近年来,大量学者对高丰度稀土永磁材料的高值化利用展开了广泛研究.然而,在不同成分合金中,其主相热稳定性、第二相种类、相析出行为、价态、微量元素的偏聚冶金行为等方面均与目前广泛使用的Nd基商业磁体存在较大差异.综述了高丰度稀土永磁材料的相结构、磁性能、微观结构和耐蚀性能等研究现状,并为其进一步开发与利用提出了建议. 相似文献
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Masashi Nakamoto Kenji Kubo Yohei Katayama Toshihiro Tanaka Takaiku Yamamoto 《Metallurgical and Materials Transactions B》2012,43(3):468-476
We propose a simple method for separating rare earth elements as oxides from a neodymium magnetic sludge by focusing on the affinity of oxygen for the rare earth elements (Nd, Dy, and Pr) and Fe. We have conducted separation experiments with a carbon crucible as contact material to confirm that carbon maintains the oxygen potential in the coexistence region of rare earth oxides and metallic Fe. In this work, the oxide phase of the rare earth elements and the alloy phase that primarily consists of Fe were separated clearly when the magnetic sludge in the carbon crucible was kept at 1823?K (1550?°C) under an Ar atmosphere. The purity of the rare earth oxide phase was high and only a small amount of rare earth elements were contained in the alloy phase. We found that the melting temperature of the rare earth oxides is a crucial factor for separation efficiency in our proposed method. 相似文献
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《中国稀土学报(英文版)》2007
Novel polymer-PEN [poly(arylene ether) nitriles] was used as a sort of substrate hybrid material of rare earth complex and the solution of styrene was synthesized by solution copolymerization. The composition and structure of the rare earth luminescent polymer material were characterized by IR, SEM and XRD. The thermo property was characterized by STA. The results showed that by copolymerization, copolymer of styrene-α-methacrylic acid-rare earth based on PEN was prepared. The thermal analysis indicated that the heat-stability was improved. Moreover, the fluorescence spectra proved that the copolymer had good fluorescence property, and it showed characteristic fluorescence emission of rare earth europium. 相似文献
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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